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| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Abies bifolia | Fir, Subalpine | Pinaceae | Pine Family | Tree | Montane, Subalpine, Alpine | Woodlands | Spiraled | Simple | Entire | Long | ||||
| Abies concolor | Fir, White | Pinaceae | Pine Family | Tree | Montane | Woodlands | Spiraled | Simple | Entire | Long | ||||
| 
Abies lasciocarpa var. bifolia See: Abies bifolia  | 
Fir, Subalpine | |||||||||||||
| 
Abies lasiocarpa See: Abies bifolia  | 
Fir, Subalpine | |||||||||||||
| Abronia elliptica | Sand Verbena | Nyctaginaceae | Four O'Clock Family | Herb | White | Semi-Desert | Openings, Shrublands | Apr-Jun | Opposite | Simple | Entire | Long, Round | ||
| Acer glabrum var. glabrum | Maple, Rocky Mountain | Sapindaceae | Soapberry Family | Tree | Green, Yellow | Montane | Woodlands | Apr-Jul | Opposite | Simple | Uneven | Round | ||
| Acer grandidentatum | Maple, Big Tooth | Sapindaceae | Soapberry Family | Tree | Green, Yellow | Foothills, Montane | Woodlands | Apr-Jun | Opposite | Simple | Uneven | Round | ||
| Acer negundo | Box Elder | Sapindaceae | Soapberry Family | Tree | Green, Yellow | Semi-Desert, Foothills, Montane | Streamsides | Apr-Jun | Opposite | Compound | Uneven | Round | ||
| Achillea | Yarrow | Compositae (See Asteraceae) | ||||||||||||
| 
Achillea lanulosa See: Achillea millefolium  | 
Yarrow | |||||||||||||
| Achillea millefolium | Yarrow | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Red | Semi-Desert, Foothills, Montane, Subalpine | Openings, Woodlands, Shrublands | May-Nov | Ray | Mat | Basal, Alternate | Compound | Uneven | Long | 
| Acmispon | Pea | Leguminosae (See Fabaceae) | Pea Family | Compound | ||||||||||
| Acmispon wrightii | Vetch, Deer; Trefoil, Wright's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow, Red | Foothills, Montane | Woodlands, Openings | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| 
Acomastylis rossii See: Geum rossii var. turbinatum  | 
Avens, Alpine | |||||||||||||
| Aconitum columbianum ssp. columbianum | Monkshood | Ranunculaceae | Buttercup Family | Herb | Blue, White | Montane, Subalpine | Woodlands, Openings, Wetlands | Jun-Sep | Alternate | Simple | Uneven | Round | ||
| 
Acrolasia albicaulis See: Mentzelia albicaulis  | 
Blazingstar, Whitestem; Stickleaf, Whitestem | |||||||||||||
| Actaea rubra ssp. arguta | Baneberry, Red | Ranunculaceae | Buttercup Family | Herb | White | Montane, Subalpine | Woodlands | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| 
Adenolinum lewisii See: Linum lewisii var. lewisii  | 
Flax, Blue | |||||||||||||
| Adiantum capillus-veneris | Fern, Maidenhair | Pteridaceae | Maidenhair Fern Family | Fern | Semi-Desert, Foothills | Wetlands | Basal | Compound | Uneven | Long | ||||
| Adoxa moschatellina | Muskroot | Viburnaceae | Arrow-Wood Family | Herb | Green | Montane, Subalpine, Alpine | Wetlands, Streamsides | May-Aug | Basal, Opposite | Compound | Uneven | Round | ||
| Agastache | Mint | Labiatae (See Lamiaceae) | Mint Family | Simple | ||||||||||
| Agastache pallidiflora var. greenei | Hyssop, Giant | Lamiaceae (aka Labiatae) | Mint Family | Herb | White, Red, Blue | Foothills, Montane | Rocky, Openings | Jun-Sep | Opposite | Simple | Uneven | Long, Round | ||
| Agastache urticifolia | Hyssop, Nettleleaf Giant; Horsenettle | Lamiaceae (aka Labiatae) | Mint Family | Herb | White, Red, Blue | Montane, Subalpine | Rocky, Openings | Jun-Sep | Opposite | Simple | Uneven | Long, Round | ||
| Ageratina herbacea | Snakeroot, Fragrant | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Woodlands, Openings | Jul-Oct | Disk | Cluster | Opposite, Alternate | Simple | Entire, Uneven | Long, Round | 
| Agoseris aurantiaca | Dandelion, Orange Mountain; Agoseris, Orange | Asteraceae (aka Compositae) | Sunflower Family | Herb | Orange, Red | Foothills, Montane, Subalpine, Alpine | Openings | Jun-Sep | Ray | Single | Basal | Simple | Entire, Uneven | Long | 
| Agoseris glauca | Dandelion, Yellow Mountain; Agoseris, Yellow | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine, Alpine | Openings | May-Oct | Ray | Single | Basal | Simple | Entire, Uneven | Long | 
| Agoseris parviflora | Agoseris, Steppe | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | May-Jun | Ray | Single | Basal | Simple | Entire, Uneven | Long | 
| Alhagi maurorum | Camelthorn | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert | Openings, Shrublands | May-Aug | Alternate | Simple | Entire | Long | ||
| Aliciella formosa | Gilia, Beautiful | Polemoniaceae | Phlox Family | Herb | Red, Blue | Semi-Desert | Openings | May-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Aliciella haydenii ssp. crandallii | Gilia, Crandall's | Polemoniaceae | Phlox Family | Herb | Red, Blue | Semi-Desert, Foothills | Openings | May-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Aliciella haydenii ssp. haydenii | Gilia, Hayden's | Polemoniaceae | Phlox Family | Herb | Red, Blue | Semi-Desert, Foothills | Openings | May-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Aliciella pinnatifida | Gilia, Sticky | Polemoniaceae | Phlox Family | Herb | Blue, Red, White | Semi-Desert, Foothills, Montane, Subalpine | Openings, Disturbed, Shrublands, Woodlands, Rocky | May-Oct | Basal, Alternate | Simple, Compound | Uneven | Long | ||
| Aliciella subnuda | Gilia, Carmine | Polemoniaceae | Phlox Family | Herb | Red | Semi-Desert, Foothills | Openings | Apr-Jul | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Allionia incarnata | Windmills, Trailing; Four-o'clock, Trailing | Nyctaginaceae | Four O'Clock Family | Herb | Red | Semi-Desert | Openings | Apr-Jul | Opposite | Simple | Entire | Long | ||
| Allium | Onion | Alliaceae (See Amaryllidaceae) | Long | |||||||||||
| Allium acuminatum | Onion, Taper-tip | Amaryllidaceae | Amaryllis Family | Herb | Red | Foothills, Montane | Woodlands, Openings | Apr-Jun | Basal | Simple | Entire | Long | ||
| Allium cernuum | Onion, Nodding | Amaryllidaceae | Amaryllis Family | Herb | Red, White, Blue | Foothills, Montane | Woodlands, Openings | May-Sep | Basal | Simple | Entire | Long | ||
| Allium geyeri var. geyeri | Onion, Geyer's | Amaryllidaceae | Amaryllis Family | Herb | Red | Foothills, Montane, Subalpine, Alpine | Openings | May-Aug | Basal | Simple | Entire | Long | ||
| Allium geyeri var. tenerum | Onion, Geyer's | Amaryllidaceae | Amaryllis Family | Herb | White, Red | Montane, Subalpine | Openings, Woodlands, Shrublands | May-Aug | Basal | Simple | Entire | Long | ||
| Allium macropetalum | Onion, Large-petaled; Onion, San Juan | Amaryllidaceae | Amaryllis Family | Herb | White, Red | Semi-Desert, Foothills | Openings | Mar-May | Basal | Simple | Entire | Long | ||
| Allium nevadense | Onion, Nevada | Amaryllidaceae | Amaryllis Family | Herb | White, Red | Semi-Desert | Openings | Mar-Jun | Basal | Simple | Entire | Long | ||
| Allium textile | Onion, Textile | Amaryllidaceae | Amaryllis Family | Herb | White, Red | Semi-Desert | Openings | Mar-Jun | Basal | Simple | Entire | Long | ||
| Alloberberis fremontii | Barberry, Fremont's | Berberidaceae | Barberry Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Mar-Jun | Alternate | Simple | Uneven | Long | ||
| Alnus incana ssp. tenuifolia | Alder, Thinleaf | Betulaceae | Birch Family | Tree | Green, Brown | Montane, Subalpine | Streamsides | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| 
Alsinanthe macrantha See: Sabulina macrantha  | 
Sandwort, Large-flower | |||||||||||||
| Alyssum | Wild Alysum | Cruciferae (See Brassicaceae) | Long | |||||||||||
| 
Alyssum parviflorum See: Alyssum simplex  | 
Alyssum, Wild; Madwort | |||||||||||||
| Alyssum simplex | Alyssum, Wild; Madwort | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Foothills | Disturbed, Openings | Apr-Jun | Alternate | Simple | Entire | Long | ||
| Amaranthus powellii | Amaranthus, Powell's | Amaranthaceae | Amaranth Family | Herb | Green, Red, White | Foothills | Openings, Disturbed, Shrublands | Jun-Oct | Alternate | Simple | Entire, Uneven | Long | ||
| 
Amauriopsis dissecta See: Hymenothrix dissecta  | 
Bahia | |||||||||||||
| Amelanchier alnifolia | Serviceberry; Shadbush; Saskatoon | Rosaceae | Rose Family | Shrub | White | Foothills, Montane | Woodlands, Shrublands | May-Jul | Alternate | Simple | Uneven | Long | ||
| Amelanchier utahensis | Serviceberry, Utah | Rosaceae | Rose Family | Shrub | White | Semi-Desert, Foothills, Montane | Woodlands, Shrublands | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| 
Amerosedum lanceolatum See: Sedum lanceolatum  | 
Stonecrop, Yellow | |||||||||||||
| Amsonia eastwoodiana | Bluestar, Eastwood's | Apocynaceae | Dogbane Family | Herb | Blue, White | Semi-Desert | Openings | Mar-May | Alternate, Whorled | Simple | Entire | Long | ||
| 
Amsonia tomentosa See: Amsonia eastwoodiana  | 
Bluestar, Eastwood's | |||||||||||||
| Anaphalis margaritacea | Pearly Everlasting | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Yellow | Montane, Subalpine | Openings, Woodlands | Jun-Oct | Disk | Mat | Alternate | Simple | Entire | Long | 
| Androsace septentrionalis | Candelabra, Northern Fairy; Rockjasmine | Primulaceae | Primrose Family | Herb | White | Foothills, Montane, Subalpine | Woodlands, Openings | May-Aug | Basal | Simple | Entire, Uneven | Long | ||
| Androstephium | Lily | Liliacae (See Asparagaceae) | Asparagus Family | Long | ||||||||||
| Androstephium | Lily | Themidaecae (See Asparagaceae) | Asparagus Family | Long | ||||||||||
| Androstephium breviflorum | Lily, Sand; Lily, Funnel | Asparagaceae | Asparagus Family | Herb | White | Semi-Desert | Openings | Mar-May | Basal | Simple | Entire | Long | ||
| Anemone multifida var. multifida | Windflower; Anemone, Cutleaf | Ranunculaceae | Buttercup Family | Herb | Red, Yellow, Blue, White | Montane, Subalpine, Alpine | Woodlands, Openings, Rocky | May-Aug | Basal, Whorled | Compound | Uneven | Long, Round | ||
| 
Anemone patens See: Pulsatilla nuttalliana  | 
Pasqueflower | |||||||||||||
| Angelica | Parsley | Umbelliferae (See Apiaceae) | Parsley Family | Long | ||||||||||
| Angelica ampla | Angelica, Giant | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Green, White, Yellow | Montane, Subalpine | Wetlands, Woodlands, Openings, Rocky | Jul-Aug | Alternate | Compound | Uneven | Long, Round | ||
| Angelica grayi | Angelica, Gray's | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Green, White, Yellow | Montane, Subalpine, Alpine | Openings, Woodlands, Rocky | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| Angelica pinnata | Angelica, Pinnate | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White, Yellow | Montane | Streamsides, Openings | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| 
Anotites menziesii See: Silene menziesii  | 
Catchfly, Menzies' | |||||||||||||
| Antennaria anaphaloides | Pearly Pussytoes | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane, Subalpine, Alpine | Openings, Shrublands, Woodlands | Jun-Aug | Disk | Single | Basal, Alternate | Simple | Entire | Long | 
| Antennaria corymbosa | Pussytoes, Flat-top | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane, Subalpine | Openings | Jun-Aug | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Antennaria dimorpha | Pussytoes, Cushion | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Openings, Woodlands | Apr-Jun | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Antennaria marginata | Pussytoes, White-margined | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Woodlands | May-Aug | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Antennaria media | Pussytoes, Rocky Mountain | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Alpine, Subalpine | Rocky, Openings | Jun-Sep | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Antennaria parvifolia | Pussytoes, Small-leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Openings, Shrublands, Woodlands | May-Jul | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Antennaria pulcherrima | Handsome Pussytoes | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Montane, Subalpine | Openings, Wetlands, Streamsides | Jun-Sep | Disk | Single | Basal, Alternate | Simple | Entire | Long | 
| 
Antennaria pulcherrima var. anaphaloides See: Antennaria anaphaloides  | 
Pearly Pussytoes | |||||||||||||
| Antennaria rosea | Pussytoes, Red | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White | Foothills, Montane, Subalpine | Openings, Woodlands | May-Aug | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Anticlea elegans | Camas, Mountain Death | Melanthiaceae | False Hellebore Family | Herb | White | Montane, Subalpine, Alpine | Openings, Streamsides | Jun-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Aphyllon arizonicum | Broomrape, Arizona | Orobanchaceae | Broomrape Family | Herb | Blue, Red, White | Semi-Desert, Foothills | Openings, Shrublands, Woodlands | Mar-Aug | Reduced To Appressed Scales | N/A | N/A | N/A | ||
| Aphyllon fasciculatum | Broomrape, Bundled | Orobanchaceae | Broomrape Family | Herb | Red, Yellow, Blue | Foothills, Montane | Openings, Shrublands, Woodlands | Apr-Jul | Reduced To Appressed Scales | N/A | N/A | N/A | ||
| Aphyllon uniflorum | Broomrape, Single-flower | Orobanchaceae | Broomrape Family | Herb | Red, Blue, White, Yellow | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | Apr-Jul | Reduced To Appressed Scales | N/A | N/A | N/A | ||
| Apocynum androsaemifolium | Dogbane, Spreading | Apocynaceae | Dogbane Family | Herb | White, Red | Semi-Desert, Foothills, Montane | Openings, Woodlands, Disturbed | May-Aug | Opposite | Simple | Entire | Long, Round | ||
| Apocynum cannabinum | Dogbane; Hemp, Indian | Apocynaceae | Dogbane Family | Herb | White | Foothills, Montane | Openings, Woodlands, Disturbed | May-Aug | Opposite | Simple | Entire | Long, Round | ||
| Aquilegia coerulea var. coerulea | Columbine, Colorado | Ranunculaceae | Buttercup Family | Herb | Blue, White | Montane, Subalpine, Alpine | Openings, Woodlands, Rocky | Jun-Sep | Basal | Compound | Uneven | Round | ||
| Aquilegia coerulea var. coerulea forma daileyae | Columbine, Spurless | Ranunculaceae | Buttercup Family | Herb | Blue | Montane, Subalpine | Woodlands, Rocky, Openings | Jun-Aug | Basal | Compound | Uneven | Round | ||
| 
Aquilegia coerulea var. daileyae See: Aquilegia coerulea var. coerulea forma daileyae  | 
Columbine, Spurless | |||||||||||||
| Aquilegia coerulea x elegantula | Columbine, Hybrid | Ranunculaceae | Buttercup Family | Herb | Red | Montane, Subalpine | Woodlands, Rocky, Openings | Jun-Aug | Basal | Compound | Uneven | Round | ||
| Aquilegia elegantula | Columbine, Shooting Star | Ranunculaceae | Buttercup Family | Herb | Red | Foothills, Montane, Subalpine | Woodlands, Rocky, Openings | May-Aug | Basal | Compound | Uneven | Round | ||
| Aquilegia micrantha var. micrantha | Columbine, Alcove | Ranunculaceae | Buttercup Family | Herb | White, Yellow, Red | Semi-Desert | Wetlands, Rocky, Openings | Apr-Jul | Basal | Compound | Uneven | Round | ||
| 
Arabis fendleri See: Boechera perennans ssp. fendleri  | 
Rockcress, Fendler's | |||||||||||||
| 
Arabis glabra See: Turritis glabra  | 
Tower Mustard | |||||||||||||
| Arceuthobium vaginatum ssp. cryptopodum | Mistletoe, Dwarf | Santalaceae | Sandalwood Family | Herb | Yellow | Montane | Woodlands | May-Jul | Opposite, Absent | Simple | Entire | Round | ||
| Arctostaphylos patula | Manzanita, Greenleaf | Ericaceae | Heath Family | Shrub | Red | Semi-Desert, Foothills | Woodlands, Shrublands | Mar-Jun | Alternate | Simple | Entire | Round | ||
| Arctostaphylos uva-ursi | Kinnikinnick; Bearberry | Ericaceae | Heath Family | Herb, Vine | Red | Montane, Subalpine | Woodlands, Openings | May-Aug | Alternate | Simple | Entire | Round | ||
| 
Arenaria fendleri variety eastwoodiae See: Eremogone eastwoodiae var. adenophora  | 
Sandwort, Eastwood's | |||||||||||||
| Arenaria lanuginosa ssp. saxosa | Chickweed, Woolly; Sandwort, Spreading | Caryophyllaceae | Pink Family | Herb | White | Foothills, Montane, Subalpine, Alpine | Woodlands | Jun-Sep | Opposite, Whorled | Simple | Entire | Long | ||
| 
Arenaria macrantha See: Sabulina macrantha  | 
Sandwort, Large-flower | |||||||||||||
| 
Arenaria macrophylla See: Moehringia macrophylla  | 
Sandwort, Bigleaf | |||||||||||||
| 
Arenaria rubella See: Sabulina rubella  | 
Sandwort, Red | |||||||||||||
| 
Argemone albiflora See: Argemone polyanthemos  | 
Poppy, Crested Prickly | |||||||||||||
| Argemone corymbosa var. arenicola | Poppy, Mojave Prickly | Papaveraceae | Poppy Family | Herb | White | Semi-Desert | Openings | Apr-Nov | Alternate | Simple | Uneven | Long | ||
| 
Argemone intermedia See: Argemone polyanthemos  | 
Poppy, Crested Prickly | |||||||||||||
| Argemone polyanthemos | Poppy, Crested Prickly | Papaveraceae | Poppy Family | Herb | White | Semi-Desert, Foothills, Montane | Openings, Disturbed | Jun-Sep | Alternate | Simple | Uneven | Long | ||
| Argyrochosma limitanea | Fern, Cloak | Pteridaceae | Maidenhair Fern Family | Fern | Semi-Desert | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| Arnica chamissonis | Arnica, Chamisso's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings, Woodlands, Wetlands | Jun-Sep | Both | Single, Cluster | Basal, Opposite | Simple | Entire, Uneven | Long | 
| Arnica cordifolia | Arnica, Heartleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Woodlands, Openings | Jun-Oct | Both | Mat, Single | Opposite, Basal | Simple | Entire, Uneven | Round | 
| Arnica latifolia | Arnica, Broadleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Woodlands, Openings, Rocky | Jun-Aug | Both | Mat, Single | Opposite | Simple | Entire, Uneven | Long, Round | 
| Arnica mollis | Arnica, Soft | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Woodlands, Openings, Rocky | Jul-Sep | Both | Mat, Single | Opposite | Simple | Entire | Long | 
| Arnica parryi | Arnica, Parry's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Woodlands, Openings | Jun-Sep | Disk | Single | Opposite | Simple | Entire | Long | 
| Arnica rydbergii | Arnica, Rydberg's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Sep | Both | Single | Opposite | Simple | Entire | Long | 
| Artemisia bigelovii | Sagebrush, Bigelow's | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Semi-Desert, Foothills | Rocky, Openings | Jul-Oct | Both | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| Artemisia borealis | Sagewort, Northern; Sagewort, Field; Wormwood, Field | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Sep | Disk | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| Artemisia carruthii | Sagewort, Carruth's; Wormwood, Carruth's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Shrublands, Openings, Woodlands | Jun-Sep | Disk | Mat | Alternate | Simple, Compound | Uneven, Entire | Long | 
| Artemisia dracunculus | Tarragon, Wild | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Rocky, Openings, Disturbed | Jun-Oct | Disk | Mat | Alternate | Simple | Uneven, Entire | Long | 
| Artemisia filifolia | Sagebrush, Sand | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands, Openings | Jul-Oct | Disk | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| Artemisia franserioides | Sagebrush, Ragweed; Mugwort, Bursage | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Rocky, Woodlands, Openings | Jul-Oct | Disk | Mat | Alternate | Simple | Uneven | Long | 
| Artemisia frigida | Sagewort, Fringed; Sagebrush, Fringed; Sagewort, Prairie | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings, Shrublands | Jun-Sep | Disk | Mat | Alternate | Simple | Uneven, Entire | Long | 
| Artemisia ludoviciana | Sagewort, Silvery; Wormwood, Louisiana | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings, Woodlands | Jun-Oct | Disk | Mat | Alternate | Simple, Compound | Uneven, Entire | Long | 
| Artemisia nova | Sagebrush, Black | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Foothills, Montane | Shrublands | Jun-Oct | Disk | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| Artemisia scopulorum | Sagewort, Alpine | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Rocky, Openings | Jul-Sep | Disk | Single | Alternate | Simple, Compound | Uneven, Entire | Long | 
| Artemisia spinescens | Sagebrush, Spiny; Budsage | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert | Openings | Apr-Jun | Disk | Cluster | Alternate | Compound | Uneven | Round, Long | 
| Artemisia tridentata subspecies tridentata | Sagebrush, Big; Chamiso | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Semi-Desert, Foothills, Montane | Wetlands, Openings, Shrublands | Jun-Nov | Disk | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| Asclepias | Milkweed | Asclepiadaceae (see Apocynaceae) | Dogbane Family | Long | ||||||||||
| Asclepias asperula | Milkweed, Antelope-horn | Apocynaceae | Dogbane Family | Herb | Green, Yellow | Semi-Desert, Foothills | Openings | Apr-Jul | Alternate | Simple | Entire | Round | ||
| Asclepias cryptoceras | Milkweed, Pallid | Apocynaceae | Dogbane Family | Herb | Yellow, Red | Semi-Desert, Foothills | Shrublands, Openings, Woodlands | Apr-Jun | Opposite | Simple | Entire | Round | ||
| Asclepias cutleri | Milkweed, Cutler's | Apocynaceae | Dogbane Family | Herb | White, Red | Semi-Desert | Openings | Apr-Jun | Alternate | Simple | Entire | Round | ||
| Asclepias involucrata | Milkweed, Dwarf | Apocynaceae | Dogbane Family | Herb | White | Semi-Desert, Foothills | Shrublands, Openings, Woodlands | Apr-Jun | Opposite | Simple | Entire | Round | ||
| Asclepias macrosperma | Milkweed, Big Seed; Milkweed, Eastwood's | Apocynaceae | Dogbane Family | Herb | Yellow | Semi-Desert | Shrublands, Openings, Woodlands | Apr-Jun | Opposite | Simple | Entire | Round | ||
| Asclepias speciosa | Milkweed, Showy | Apocynaceae | Dogbane Family | Herb | Red | Semi-Desert, Foothills, Montane | Wetlands, Disturbed, Openings | May-Aug | Opposite | Simple | Entire | Round | ||
| Asclepias subverticillata | Milkweed, Horsetail; Milkweed, Whorled | Apocynaceae | Dogbane Family | Herb | White | Semi-Desert, Foothills, Montane | Openings, Woodlands, Disturbed, Shrublands | Jun-Sep | Whorled | Simple | Entire | Long | ||
| Asclepias tuberosa ssp. interior | Milkweed, Butterfly | Apocynaceae | Dogbane Family | Herb | Orange, Yellow, Red | Semi-Desert, Foothills | Rocky, Disturbed, Openings, Woodlands, Shrublands | May-Aug | Alternate | Simple | Entire | Long | ||
| Asplenium septentrionale | Fern, Grass; Spleenwort, Forked | Aspleniaceae | Spleenwort Family | Fern | Foothills, Montane | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| Asplenium trichomanes ssp. trichomanes | Spleenwort, Maidenhair | Aspleniaceae | Spleenwort Family | Fern | Montane | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| 
Aster ascendens See: Symphyotrichum ascendens  | 
Aster, Western | |||||||||||||
| 
Aster engelmannii See: Eucephalus engelmannii  | 
Aster, Engelmann's | |||||||||||||
| 
Aster ericoides See: Symphyotrichum ericoides var. ericoides  | 
Aster, Heather | |||||||||||||
| 
Aster falcatus See: Symphyotrichum falcatum var. falcatum  | 
Aster, Sickle; Aster, White Prairie | |||||||||||||
| 
Aster foliaceus See: Symphyotrichum foliaceum var. apricum  | 
Aster, Leafy | |||||||||||||
| 
Aster foliaceus See: Symphyotrichum foliaceum var. canbyi  | 
Aster, Leafy | |||||||||||||
| 
Aster foliaceus See: Symphyotrichum foliaceum var. parryi  | 
Aster, Leafy | |||||||||||||
| 
Aster glaucus See: Herrickia glauca var. glauca  | 
Aster, Waxy; Aster, Gray | |||||||||||||
| 
Aster lanceolatus See: Symphyotrichum lanceolatum subspecies hesperium  | 
Aster, White Panicled | |||||||||||||
| 
Aster spathulatus See: Symphyotrichum spathulatum var. spathulatum  | 
Aster, Spatula; Aster, Western Mountain | |||||||||||||
| Astragalus agrestis | Milkvetch, Field | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Foothills, Montane | Openings, Streamsides, Woodlands | May-Sep | Alternate | Compound | Uneven | Long | ||
| Astragalus alpinus var. alpinus | Milkvetch, Alpine | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Montane, Subalpine | Openings | May-Aug | Alternate | Compound | Uneven | Long | ||
| Astragalus amphioxys | Milkvetch, Crescent | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert, Foothills, Montane | Openings | Mar-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus bisulcatus var. haydenianus | Milkvetch, Hayden's | Fabaceae (aka Leguminosae) | Pea Family | Herb | White, Yellow | Foothills, Montane | Openings | May-Aug | Alternate | Compound | Uneven | Long | ||
| Astragalus calycosus | Milkvetch, Torrey's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Semi-Desert, Foothills | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus ceramicus var. ceramicus | Milkvetch, Painted | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue, Red | Semi-Desert | Openings, Shrublands, Woodlands | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus chamaeleuce | Milkvetch, Cicada | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Openings | Apr-Jul | Alternate | Compound | Uneven | Long | ||
| Astragalus cicer | Milkvetch, Chickpea | Fabaceae (aka Leguminosae) | Pea Family | Herb | White, Yellow | Foothills, Montane | Openings, Disturbed | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| Astragalus coltonii var. moabensis | Milkvetch, Colton's; Milkvetch, Moab | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert, Foothills | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| 
Astragalus cottamii See: Astragalus monumentalis var. cottamii  | 
Milkvetch, Monument Valley; Milkvetch, Cottam's | |||||||||||||
| Astragalus cronquistii | Milkvetch, Cronquist's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus desperatus | Milkvetch, Rimrock | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus deterior | Milkvetch, Cliff Palace | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow, Blue, Red | Foothills | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus eastwoodiae | Milkvetch, Eastwood's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Woodlands, Shrublands, Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus flavus | Milkvetch, Yellow | Fabaceae (aka Leguminosae) | Pea Family | Herb | White | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| 
Astragalus haydenianus See: Astragalus bisulcatus var. haydenianus  | 
Milkvetch, Hayden's | |||||||||||||
| Astragalus humillimus | Milkvetch, Mancos | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Openings | May-Jul | Alternate | Compound | Uneven | Long | ||
| Astragalus lentiginosus var. palans | Milkvetch, Freckled | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Openings | Mar-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus lonchocarpus | Milkvetch, Long-pod | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | May-Jul | Alternate | Compound | Uneven | Long | ||
| Astragalus missouriensis | Milkvetch, Missouri | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert, Foothills | Openings | Mar-Jul | Alternate | Compound | Uneven | Long | ||
| Astragalus mollissimus var. thompsoniae | Milkvetch, Woolly; Locoweed | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Mar-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus monumentalis var. cottamii | Milkvetch, Monument Valley; Milkvetch, Cottam's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus multiflorus | Milkvetch, Multi-flowered | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Foothills, Montane | Shrublands, Woodlands, Openings | May-Aug | Alternate | Compound | Uneven | Long | ||
| Astragalus naturitensis | Milkvetch, Naturita | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Woodlands, Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus newberryi var. newberryi | Milkvetch, Newberry's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert, Foothills | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus nuttallianus var. micranthiformis | Milkvetch, Nuttall's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Blue | Semi-Desert | Woodlands, Shrublands, Openings | Mar-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus pattersonii | Milkvetch, Patterson's | Fabaceae (aka Leguminosae) | Pea Family | Herb | White | Semi-Desert, Foothills | Openings | Apr-Aug | Alternate | Compound | Uneven | Long | ||
| Astragalus praelongus | Milkvetch, Stinking | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow, White | Semi-Desert | Shrublands, Openings | Apr-Jul | Alternate | Compound | Uneven | Long | ||
| Astragalus preussii | Milkvetch, Preuss' | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert | Openings | Mar-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus proximus | Milkvetch, Aztec | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert, Foothills | Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus schmolliae | Milkvetch, Schmoll's; Milkvetch, Chapin Mesa | Fabaceae (aka Leguminosae) | Pea Family | Herb | White, Yellow | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | May-Jun | Alternate | Compound | Uneven | Long | ||
| Astragalus scopulorum | Milkvetch, Rocky Mountain | Fabaceae (aka Leguminosae) | Pea Family | Herb | White, Yellow | Foothills, Montane | Shrublands, Woodlands, Openings | May-Aug | Alternate | Compound | Uneven | Long | ||
| 
Astragalus tenellus See: Astragalus multiflorus  | 
Milkvetch, Multi-flowered | |||||||||||||
| Astragalus wingatanus | Milkvetch, Wingate's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue, Red | Semi-Desert | Shrublands, Woodlands, Openings | May-Jul | Alternate | Compound | Uneven | Long | ||
| 
Atragene occidentalis See: Clematis occidentalis var. grosseserrata  | 
Clematis, Western | |||||||||||||
| Atriplex | Saltbush | Chenopodiaceae (See Amaranthaceae) | Long | |||||||||||
| 
Atriplex brandegeei See: Grayia brandegeei  | 
Siltbush | |||||||||||||
| Atriplex canescens var. canescens | Saltbush, Four-Winged; Chamiso | Amaranthaceae | Amaranth Family | Shrub | Yellow | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Mar-Jun | Alternate | Simple | Entire | Long | ||
| Atriplex confertifolia | Shadscale | Amaranthaceae | Amaranth Family | Shrub | Yellow | Semi-Desert, Foothills | Shrublands, Openings | Apr-Sep | Alternate | Simple | Entire | Round | ||
| Atriplex corrugata | Saltbush, Matted | Amaranthaceae | Amaranth Family | Shrub | Yellow | Semi-Desert | Shrublands, Openings | Mar-May | Alternate, Opposite | Simple | Entire | Long | ||
| Atriplex cuneata ssp. cuneata | Saltbush, Gardner's | Amaranthaceae | Amaranth Family | Shrub | Yellow | Semi-Desert | Shrublands, Openings | Mar-May | Alternate, Opposite | Simple | Entire | Long | ||
| 
Atriplex gardneri var. cuneata See: Atriplex cuneata ssp. cuneata  | 
Saltbush, Gardner's | |||||||||||||
| 
Atriplex grayi See: Grayia spinosa  | 
Hopsage, Spiny | |||||||||||||
| 
Atriplex pleiantha See: Proatriplex pleiantha  | 
Shadscale, Mancos; Orach, Four Corners | |||||||||||||
| 
Aulospermum purpureum See: Cymopterus purpureus  | 
Biscuitroot, Purple; Parsley, Purple Spring | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
Bahia dissecta See: Hymenothrix dissecta  | 
Bahia | |||||||||||||
| 
Bahia neomexicana See: Picradeniopsis multiflora  | 
Threadleaf | |||||||||||||
| Balsamorhiza sagittata | Balsamroot, Arrowleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Woodlands, Openings, Shrublands | Apr-Jun | Both | Single | Basal, Alternate, Opposite | Simple | Entire | Long, Round | 
| Barbarea vulgaris | Rocket, Yellow | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Foothills, Montane, Subalpine | Distrubed, Openings, Woodlands, Wetlands | Apr-Aug | Alternate | Compound, Simple | Entire, Uneven | Long | ||
| Bassia scoparia | Kochia, Mexican Fireweed, Burning Bush, Summer Cypress | Amaranthaceae | Amaranth Family | Herb, Shrub | Green, Yellow | Semi-Desert, Foothills | Shrublands, Openings, Disturbed | May-Oct | Alternate | Simple | Entire | Long | ||
| 
Bassia sieversiana See: Bassia scoparia  | 
Kochia, Mexican Fireweed, Burning Bush, Summer Cypress | |||||||||||||
| 
Batrachium aquatile See: Ranunculus longirostris  | 
Crowfoot, Water | |||||||||||||
| 
Batrachium circinatum See: Ranunculus longirostris  | 
Crowfoot, Water | |||||||||||||
| 
Batrachium longirostre See: Ranunculus longirostris  | 
Crowfoot, Water | |||||||||||||
| Berberis fendleri | Barberry, Fendler's | Berberidaceae | Barberry Family | Shrub | Yellow | Foothills, Montane | Woodlands | Apr-Jul | Alternate | Simple | Entire | Long | ||
| 
Berberis repens See: Mahonia repens  | 
Oregon Grape | |||||||||||||
| 
Besseya alpina See: Veronica besseya  | 
Kitten Tails, Alpine; Coral Drops, Alpine | |||||||||||||
| 
Besseya plantaginea See: Veronica plantaginea  | 
Coral Drops, White River; Kitten Tails, White River | |||||||||||||
| 
Besseya ritteriana See: Veronica ritteriana  | 
Kitten Tails, Ritters'; Coral Drops, Ritters' | |||||||||||||
| 
Betula fontinalis See: Betula occidentalis  | 
Birch, Water | |||||||||||||
| Betula occidentalis | Birch, Water | Betulaceae | Birch Family | Tree | Green, Brown | Semi-Desert, Foothills, Montane | Streamsides | May-Jul | Alternate | Simple | Uneven | Long | ||
| Bidens cernua | Bur-Marigold, Nodding; Beggar-ticks, Nodding | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Disturbed, Wetlands | Jul-Oct | Both, Disk | Single | Opposite | Simple | Uneven | Long | 
| Bistorta bistortoides | Bistort, American | Polygonaceae | Buckwheat Family | Herb | White | Subalpine, Alpine | Openings, Wetlands | Jun-Sep | Basal, Alternate | Simple | Entire | Long | ||
| Bistorta vivipara | Bistort, Alpine | Polygonaceae | Buckwheat Family | Herb | White | Subalpine, Alpine | Openings, Rocky | Jun-Sep | Basal, Alternate | Simple | Entire | Long | ||
| Blitum nuttallianum | Poverty Weed, Nuttall's | Amaranthaceae | Amaranth Family | Herb | Red, Yellow | Semi-Desert, Foothills, Montane | Shrublands, Openings | Mar-Jun | Alternate | Simple | Uneven, Entire | Long | ||
| 
Boechera drummondii See: Boechera stricta  | 
Rockcress, Drummond's | |||||||||||||
| 
Boechera duchesnensis See: Boechera quadrangulensis  | 
Rockcress, Desert | |||||||||||||
| 
Boechera fendleri See: Boechera perennans ssp. fendleri  | 
Rockcress, Fendler's | |||||||||||||
| Boechera formosa | Rockcress, Beautiful | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Red, Blue | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Mar-Jun | Basal, Alternate | Simple | Entire | Long | ||
| 
Boechera holboellii var. fendleri See: Boechera perennans ssp. fendleri  | 
Rockcress, Fendler's | |||||||||||||
| Boechera lemmonii | Rockcress, Lemmon's | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Red | Alpine | Openings, Rocky | Jun-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Boechera perennans ssp. fendleri | Rockcress, Fendler's | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Blue | Semi-Desert, Foothills, Montane | Shrublands, Woodlands | Apr-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| 
Boechera pulchra See: Boechera formosa  | 
Rockcress, Beautiful | |||||||||||||
| 
Boechera pulchra var. duchesnensis See: Boechera quadrangulensis  | 
Rockcress, Desert | |||||||||||||
| Boechera quadrangulensis | Rockcress, Desert | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Red, Blue | Semi-Desert | Shrublands, Openings, Woodlands | Mar-May | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Boechera sp. | Rockcress | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Shrublands, Woodlands | Mar-Aug | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Boechera stricta | Rockcress, Drummond's | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Red, Blue | Foothills, Montane, Subalpine, Alpine | Woodlands | May-Aug | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Botrychium echo | Moonwort, Echo | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| Botrychium furculatum | Moomwort, Forked | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| Botrychium hesperium | Moonwort, Western | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| Botrychium lanceolatum | Moonwort, Lance-leaf | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| 
Botrychium lunaria See: Botrychium neolunaria  | 
Moonwort, New Moon | |||||||||||||
| Botrychium minganense | Moonwort, Mingan | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| Botrychium neolunaria | Moonwort, New Moon | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| 
Botrychium neolunaria See: Botrychium tunux  | 
Moosewort | |||||||||||||
| 
Botrychium pallidum See: Botrychium furculatum  | 
Moomwort, Forked | |||||||||||||
| Botrychium pinnatum | Moonwort, Pinnate | Ophioglossaceae | Adder's Tongue Family | Fern | Montane, Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| 
Botrychium redbank See: Botrychium furculatum  | 
Moomwort, Forked | |||||||||||||
| Botrychium tunux | Moosewort | Ophioglossaceae | Adder's Tongue Family | Fern | Subalpine, Alpine | Openings, Disturbed | Basal | Compound | Uneven | Long | ||||
| 
Breea arvensis See: Cirsium arvense  | 
Thistle, Canada; Thistle, Creeping | |||||||||||||
| Brickellia californica | Brickellbush, California | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow, White, Red | Foothills, Montane | Openings, Rocky, Shrublands, Woodlands | Jul-Oct | Disk | Cluster | Alternate | Simple | Uneven | Long, Round | 
| Brickellia grandiflora | Brickellbush, Large-flowered; Tasselflower | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow, White | Foothills, Montane, Subalpine | Rocky, Openings | Jul-Oct | Disk | Cluster | Alternate, Opposite | Simple | Uneven | Long, Round | 
| Brickellia microphylla var. scabra | Brickellbush, Small-leaf | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | White, Yellow | Semi-Desert, Foothills | Rocky, Shrublands, Woodlands, Openings | Jun-Oct | Disk | Cluster | Alternate | Simple | Uneven | Long, Round | 
| Brickellia oblongifolia var. linifolia | Brickellbush, Narrowleaf; Brickellbush, Mojave | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow, White, Red, Green, Blue | Semi-Desert, Foothills | Rocky, Openings | May-Jul | Disk | Cluster | Alternate | Simple | Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Calochortus | Sego Lilly | Calochortaceae (See Liliaceae) | Long | |||||||||||
| Calochortus flexuosus | Lily, Winding Sego; Lily, Winding Mariposa | Liliaceae | Lily Family | Herb | White, Red | Semi-Desert | Shrublands | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Calochortus gunnisonii var. gunnisonii | Lily, Gunnison's Sego; Lily, Gunnison's Mariposa | Liliaceae | Lily Family | Herb | White | Foothills, Montane, Subalpine | Openings | Jun-Aug | Basal | Simple | Entire | Long | ||
| Calochortus nuttallii | Lily, Nuttall's Sego; Lily, Nuttall's Mariposa | Liliaceae | Lily Family | Herb | White | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Caltha chionophila | Marigold, Marsh | Ranunculaceae | Buttercup Family | Herb | White | Subalpine, Alpine | Wetlands, Openings | May-Aug | Basal | Simple | Entire, Uneven | Long, Round | ||
| 
Caltha leptosepala See: Caltha chionophila  | 
Marigold, Marsh | |||||||||||||
| 
Calylophus lavandulifolius See: Oenothera lavandulifolia  | 
Sundrops | |||||||||||||
| Calypso bulbosa var. americana | Orchid, Fairy-Slipper; Orchid, Calypso | Orchidaceae | Orchid Family | Herb | Red | Foothills, Montane, Subalpine | Woodlands | May-Jul | Basal | Simple | Entire | Long | ||
| Camelina microcarpa | Camelina; Flax, Littlepod | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow, White | Semi-Desert, Foothills, Montane | Openings, Disturbed | Apr-Jul | Alternate | Simple | Entire | Long | ||
| 
Camissonia scapoidea ssp. scapoidea See: Chylismia scapoidea ssp. scapoidea  | 
Bee Blossom, Leafless; Suncups, Leafless | |||||||||||||
| 
Camissonia walkeri ssp. walkeri See: Chylismia walkeri ssp. walkeri  | 
Bee Blossom, Walker's; Suncups, Walker's | |||||||||||||
| Campanula parryi var. parryi | Harebells, Parry's; Bellflowers, Parry's | Campanulaceae | Bellflower Family | Herb | Blue | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Sep | Basal, Alternate | Simple | Entire, Uneven | Long, Round | ||
| Campanula rotundifolia | Harebells; Bluebells of Scotland | Campanulaceae | Bellflower Family | Herb | Blue | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Oct | Basal, Alternate | Simple | Entire, Uneven | Long, Round | ||
| Capsella bursa-pastoris | Shepherd's Purse | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Foothills, Montane | Openings, Disturbed | Apr-Sep | Alternate, Basal | Simple | Entire, Uneven | Long | ||
| Cardamine cordifolia | Bittercress, Heartleaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Montane, Subalpine, Alpine | Streamsides | Jun-Oct | Alternate, Basal | Simple | Uneven | Long | ||
| 
Cardaria chalepensis See: Lepidium chalepense  | 
Pepperwort, Lens Pod | |||||||||||||
| 
Cardaria draba See: Lepidium chalepense  | 
Pepperwort, Lens Pod | |||||||||||||
| 
Cardaria draba See: Lepidium draba  | 
Whitetop | |||||||||||||
| 
Cardaria latifolia See: Lepidium latifolium  | 
Pepperweed, Broad-leaf; Pepperwort, Broad-leaf | |||||||||||||
| Carduus nutans | Thistle, Musk; Thistle, Nodding | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Semi-Desert, Foothills, Montane, Subalpine | Openings, Disturbed | Jun-Oct | Disk | Single | Alternate | Simple | Uneven | Long | 
| Castilleja | Paintbrush | Scrophulariaceae (Also see Orobanchaceae Family) | Broomrape Family | Long | ||||||||||
| Castilleja chromosa | Paintbrush, Desert | Orobanchaceae | Broomrape Family | Herb | Red, Orange, Green | Semi-Desert, Foothills | Woodlands, Shrublands, Rocky, Openings | Mar-Jun | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja haydenii | Paintbrush, Hayden's | Orobanchaceae | Broomrape Family | Herb | Red, Green | Alpine | Openings, Rocky | Jul-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja integra | Paintbrush, Whole-leaf | Orobanchaceae | Broomrape Family | Herb | Red, Green | Semi-Desert, Foothills, Montane | Shrublands, Woodlands | Apr-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja linariifolia | Paintbrush, Wyoming | Orobanchaceae | Broomrape Family | Herb | Red, Green | Semi-Desert, Foothills, Montane | Shrublands, Woodlands | Jun-Oct | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja lineata | Paintbrush, Lineated | Orobanchaceae | Broomrape Family | Herb | Yellow, Green | Montane | Openings | Jun-Aug | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja miniata var. miniata | Paintbrush, Red | Orobanchaceae | Broomrape Family | Herb | Red, Orange, Green | Montane, Subalpine | Openings | Jun-Oct | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja occidentalis | Paintbrush, Western Yellow | Orobanchaceae | Broomrape Family | Herb | Yellow, White, Green | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja rhexiifolia | Paintbrush, Rose | Orobanchaceae | Broomrape Family | Herb | Red, Green | Subalpine, Alpine | Openings | Jun-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja scabrida | Paintbrush, Eastwood's | Orobanchaceae | Broomrape Family | Herb | Red, Green | Semi-Desert, Foothills | Openings | Mar-Jun | Alternate | Simple | Entire, Uneven | Long | ||
| Castilleja septentrionalis | Paintbrush, Northern Yellow | Orobanchaceae | Broomrape Family | Herb | Yellow, White, Green | Montane, Subalpine, Alpine | Openings | Jun-Aug | Alternate | Simple | Entire, Uneven | Long | ||
| 
Castilleja sulphurea See: Castilleja septentrionalis  | 
Paintbrush, Northern Yellow | |||||||||||||
| Castilleja versicolor sp. nov. | Paintbrush, Varied | Orobanchaceae | Broomrape Family | Herb | Green, White, Red, Yellow | Subalpine, Alpine | Openings | Jun-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Ceanothus fendleri | Buckthorn, Fendler's; Ceanothus, Fendler's; Buckbrush, Fendler's | Rhamnaceae | Buckthorn Family | Shrub | White | Montane | Woodlands | Jun-Aug | Alternate | Simple | Entire, Uneven | Long | ||
| 
Ceanothus franklinii See: Ceanothus pauciflorus  | 
Buckthorn, Desert; Buckbrush, Desert | |||||||||||||
| 
Ceanothus greggii See: Ceanothus pauciflorus  | 
Buckthorn, Desert; Buckbrush, Desert | |||||||||||||
| 
Ceanothus greggii var. franklinii See: Ceanothus pauciflorus  | 
Buckthorn, Desert; Buckbrush, Desert | |||||||||||||
| Ceanothus pauciflorus | Buckthorn, Desert; Buckbrush, Desert | Rhamnaceae | Buckthorn Family | Shrub | Blue, White | Semi-Desert | Openings, Rocky | Apr-May | Opposite | Simple | Entire, Uneven | Long | ||
| Celtis reticulata | Hackberry | Cannabaceae | Hemp Family | Tree | Semi-Desert, Foothills | Rocky, Woodlands, Wetlands, Streamsides | Apr-Jun | Alternate | Simple | Entire, Uneven | Long | |||
| 
Centaurea repens See: Rhaponticum repens  | 
Knapweed, Russian | |||||||||||||
| Cerastium arvense ssp. strictum | Chickweed, Mouse-ear | Caryophyllaceae | Pink Family | Herb | White | Montane, Subalpine | Openings | May-Sep | Opposite | Simple | Entire | Long | ||
| Cerastium beeringianum | Chickweed, Beering's | Caryophyllaceae | Pink Family | Herb | White | Subalpine, Alpine | Openings | May-Sep | Opposite | Simple | Entire | Long | ||
| 
Cerastium strictum See: Cerastium arvense ssp. strictum  | 
Chickweed, Mouse-ear | |||||||||||||
| 
Ceratocephala orthoceras See: Ceratocephala testiculata  | 
Hornhead; Buttercup Bur | |||||||||||||
| Ceratocephala testiculata | Hornhead; Buttercup Bur | Ranunculaceae | Buttercup Family | Herb | Yellow | Semi-Desert, Foothills | Openings, Woodlands, Shrublands, Disturbed | Mar-May | Basal | Compound | Uneven | Long, Round | ||
| Cercocarpus intricatus | Mahogany, Narrow-leaf Mountain | Rosaceae | Rose Family | Shrub | Red, Yellow | Semi-Desert, Foothills | Shrublands, Openings | Apr-Jun | Alternate | Simple | Entire | Long | ||
| Cercocarpus ledifolius | Mahogany, Curl-leaf Mountain | Rosaceae | Rose Family | Shrub, Tree | Red, Yellow | Semi-Desert, Foothills | Woodlands, Openings | May-Jun | Alternate | Simple | Entire | Long | ||
| 
Cercocarpus ledifolius var. intricatus See: Cercocarpus intricatus  | 
Mahogany, Narrow-leaf Mountain | |||||||||||||
| Cercocarpus montanus | Mahogany, Mountain | Rosaceae | Rose Family | Shrub | Red, Yellow | Semi-Desert, Foothills, Montane | Shrublands, Woodlands | May-Jul | Alternate | Simple | Uneven | Long, Round | ||
| 
Chaenactis alpina See: Chaenactis douglasii var. alpina  | 
Chaenactis, Alpine; Dusty-Maiden, Alpine; Pincushion, Alpine | |||||||||||||
| Chaenactis douglasii var. alpina | Chaenactis, Alpine; Dusty-Maiden, Alpine; Pincushion, Alpine | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Red | Subalpine, Alpine | Openings, Rocky | Jun-Sep | Disk | Mat | Alternate | Compound | Uneven | Long | 
| Chaenactis douglasii var. douglasii | Chaenactis, Douglas'; Dusty-Maiden, Douglas'; Pincushion, Douglas' | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow, White | Foothills | Woodlands, Openings | May-Aug | Disk | Single | Alternate | Compound | Uneven | Long | 
| Chaenactis stevioides | Chaenactis, Esteve's; Dusty-Maiden, Esteve's; Pincushion, Esteve's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert | Shrublands, Openings | Mar-Jun | Disk | Single | Alternate | Compound | Uneven | Long | 
| Chaetopappa ericoides | Aster, Sand; Heath, Rose | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills | Shrublands, Openings | Mar-Jun | Both | Cluster | Alternate | Simple | Entire | Long | 
| Chamaechaenactis scaposa | Fullstem | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills | Woodlands, Openings | May-Jul | Disk | Mat | Basal, Alternate | Simple | Entire, Uneven | Round | 
| Chamaenerion angustifolium ssp. circumvagum | Fireweed | Onagraceae | Evening Primrose Family | Herb | Red | Montane, Subalpine | Openings, Disturbed | Jun-Sep | Alternate, Whorled | Simple | Entire | Long | ||
| Chamaenerion latifolium | Fireweed, Alpine | Onagraceae | Evening Primrose Family | Herb | Red | Subalpine, Alpine | Streamsides, Rocky, Openings | Jun-Aug | Alternate, Whorled | Simple | Entire | Long | ||
| 
Chamaesyce fendleri See: Euphorbia fendleri  | 
Spurge, Fendler's; Sandmat, Fendler's | |||||||||||||
| 
Chamaesyce glyptosperma See: Euphorbia glyptosperma  | 
Spurge, Carved Seed | |||||||||||||
| 
Chamaesyce serpyllifolia See: Euphorbia serpillifolia var. serpillifolia  | 
Spurge, Thyme-leaf | |||||||||||||
| 
Chamerion angustifolium See: Chamaenerion angustifolium ssp. circumvagum  | 
Fireweed | |||||||||||||
| 
Chamerion danielsii See: Chamaenerion angustifolium ssp. circumvagum  | 
Fireweed | |||||||||||||
| 
Chamerion latifolium See: Chamaenerion latifolium  | 
Fireweed, Alpine | |||||||||||||
| 
Chamerion subdentatum See: Chamaenerion latifolium  | 
Fireweed, Alpine | |||||||||||||
| 
Cheilanthes feei See: Myriopteris gracilis  | 
Fern, Slender Lip | |||||||||||||
| 
Cheilanthes limitanea See: Argyrochosma limitanea  | 
Fern, Cloak | |||||||||||||
| Chenopodium | Goosefoot | Chenopodiaceae (See Amaranthaceae) | Long, Round | |||||||||||
| Chenopodium album | Lamb's Quarters | Amaranthaceae | Amaranth Family | Herb | Green | Semi-Desert, Foothills, Montane | Openings, Shrublands, Disturbed | Jun-Oct | Alternate | Simple | Uneven, Entire | Long, Round | ||
| Chenopodium atrovirens | Goosefoot, Pinyon | Amaranthaceae | Amaranth Family | Herb | White, Green | Semi-Desert, Foothills, Montane | Openings, Wetlands, Disturbed | May-Sep | Alternate | Simple | Uneven, Entire | Long, Round | ||
| 
Chenopodium desiccatum See: Chenopodium pratericola  | 
Goosefoot, Desert | |||||||||||||
| 
Chenopodium leptophyllum See: Chenopodium pratericola  | 
Goosefoot, Desert | |||||||||||||
| Chenopodium pratericola | Goosefoot, Desert | Amaranthaceae | Amaranth Family | Herb | Green | Semi-Desert, Foothills, Montane | Openings, Shrublands, Disturbed | Jun-Sep | Alternate | Simple | Uneven, Entire | Long, Round | ||
| Cherleria obtusiloba | Sandwort, Alpine; Stitchwort, Alpine | Caryophyllaceae | Pink Family | Herb | White | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Chionophila jamesii | Snowlover | Plantaginaceae | Plantain Family | Herb | White | Alpine | Openings, Rocky | Jul-Sep | Basal, Opposite | Simple | Entire | Long | ||
| 
Chlorocrepis fendleri See: Hieracium fendleri  | 
Hawkweed, Fendler's | |||||||||||||
| 
Chlorocrepis tristis See: Hieracium triste  | 
Hawkweed, Woolly | |||||||||||||
| 
Chondrophylla prostrata See: Gentiana prostrata  | 
Gentian, Siberian; Gentian, Moss; Gentian, Pygmy | |||||||||||||
| Chorispora tenella | Mustard, Purple | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Blue, Red | Semi-Desert, Foothills | Woodlands, Openings | Mar-Jun | Alternate | Simple | Uneven | Long | ||
| 
Chrysanthemum leucanthemum See: Leucanthemum vulgare  | 
Daisy, Ox-eye | |||||||||||||
| Chrysothamnus depressus | Rabbitbrush, Low | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Semi-Desert, Foothills, Montane | Shrublands, Disturbed | Aug-Oct | Disk | Cluster | Alternate | Simple | Entire | Long | 
| Chrysothamnus greenei | Rabbitbrush, Greene's | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Jul-Oct | Disk | Cluster | Alternate | Simple | Entire | Long | 
| 
Chrysothamnus nauseosus See: Ericameria nauseosa variety graveolens  | 
Rabbitbrush; Rabbitbrush, Rubber; Rabbitbrush, Golden; Chamisa | |||||||||||||
| 
Chrysothamnus parryi See: Ericameria parryi  | 
Rabbitbrush, Parry's | |||||||||||||
| Chrysothamnus viscidiflorus | Rabbitbrush, Sticky | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Foothills, Montane | Openings, Disturbed, Shrublands | Jun-Oct | Disk | Cluster | Alternate | Simple | Entire | Long | 
| Chylismia scapoidea ssp. scapoidea | Bee Blossom, Leafless; Suncups, Leafless | Onagraceae | Evening Primrose Family | Herb | Yellow | Semi-Desert | Shrublands, Woodlands, Rocky, Openings | May-Jul | Basal | Simple | Entire, Uneven | Long | ||
| Chylismia walkeri ssp. walkeri | Bee Blossom, Walker's; Suncups, Walker's | Onagraceae | Evening Primrose Family | Herb | Yellow | Semi-Desert | Shrublands, Woodlands, Rocky | Apr-Jun | Basal | Simple | Uneven | Long | ||
| Cichorium intybus | Chicory | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Foothills, Montane | Openings, Disturbed | May-Oct | Ray | Single | Alternate | Simple | Entire, Uneven | Long | 
| 
Cicuta douglasii See: Cicuta maculata  | 
Hemlock, Water | |||||||||||||
| Cicuta maculata | Hemlock, Water | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Foothills, Montane | Wetlands, Streamsides | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| 
Cilaria austromontana See: Saxifraga austromontana  | 
Saxifrage, Spotted | |||||||||||||
| Cirsium arizonicum var. bipinnatum | Thistle, Arizona | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Foothills, Montane | Woodlands, Openings | May-Sep | Disk | Single | Basal, Alternate | Simple | Uneven | Long | 
| Cirsium arvense | Thistle, Canada; Thistle, Creeping | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Foothills, Montane | Openings, Disturbed | Jun-Oct | Disk | Single | Alternate | Simple | Uneven | Long | 
| 
Cirsium calcareum See: Cirsium arizonicum var. bipinnatum  | 
Thistle, Arizona | |||||||||||||
| Cirsium clavatum var. americanum | Thistle, Fish Lake | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Red | Foothills, Montane, Subalpine | Woodlands, Openings | Jun-Sep | Disk | Single | Alternate | Simple | Uneven | Long | 
| 
Cirsium coloradense See: Cirsium scariosum var. coloradense  | 
Thistle, Meadow; Thistle, Elk | |||||||||||||
| 
Cirsium eatoni var. hesperium See: Cirsium scopulorum  | 
Thistle, Alpine | |||||||||||||
| Cirsium eatonii | Thistle, Eaton's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Red | Montane, Subalpine, Alpine | Openings, Rocky | Jun-Aug | Disk | Single | Alternate | Simple | Uneven | Long | 
| 
Cirsium eatonii See: Cirsium tukuhnikivatzicum  | 
La Sal Thistle | |||||||||||||
| 
Cirsium eriocephalum See: Cirsium scopulorum  | 
Thistle, Alpine | |||||||||||||
| 
Cirsium griseum See: Cirsium clavatum var. americanum  | 
Thistle, Fish Lake | |||||||||||||
| 
Cirsium hesperium See: Cirsium scopulorum  | 
Thistle, Alpine | |||||||||||||
| Cirsium neomexicanum | Thistle, New Mexico | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Yellow | Semi-Desert, Foothills | Openings | Apr-Jul | Disk | Single | Basal, Alternate | Simple | Uneven | Long | 
| Cirsium parryi | Thistle, Parry's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Woodlands, Openings | Jul-Oct | Disk | Single | Alternate | Simple | Uneven | Long | 
| Cirsium scariosum var. coloradense | Thistle, Meadow; Thistle, Elk | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Openings | Jun-Sep | Disk | Single | Basal, Alternate | Simple | Uneven | Long | 
| Cirsium scopulorum | Thistle, Alpine | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White, Blue | Montane, Subalpine, Alpine | Openings | Jul-Sep | Disk | Single | Alternate | Simple | Uneven | Long | 
| 
Cirsium scopulorum See: Cirsium tukuhnikivatzicum  | 
La Sal Thistle | |||||||||||||
| Cirsium tracyi | Thistle, Tracy's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills, Montane | Woodlands, Openings | May-Jul | Disk | Single | Basal, Alternate | Simple | Uneven | Long | 
| Cirsium tukuhnikivatzicum | La Sal Thistle | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Pink | Montane, Subalpine, Alpine | Openings, Woodlands, Shrublands | Jul-Sep | Disk | Single | Basal, Alternate | Simple | Uneven | Long | 
| 
Cirsium undulatum var. trayci See: Cirsium tracyi  | 
Thistle, Tracy's | |||||||||||||
| Cirsium vulgare | Thistle, Bull | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, Blue | Semi-Desert, Foothills | Disturbed | Jun-Sep | Disk | Single | Alternate | Simple | Uneven | Long | 
| Claytonia | Spring Beauty | Portulacaceae (SeeMontiaceae) | Miner's Lettuce Family | Long | ||||||||||
| Claytonia lanceolata | Spring Beauty | Montiaceae | Miner's Lettuce Family | Herb | White, Red, Blue | Foothills, Montane, Subalpine, Alpine | Woodlands, Openings | Apr-Jul | Basal, Opposite | Simple | Entire | Long | ||
| Claytonia megarhiza | Spring Beauty, Alpine | Montiaceae | Miner's Lettuce Family | Herb | White, Red | Alpine | Rocky, Openings | Jun-Aug | Basal, Opposite | Simple | Entire | Long, Round | ||
| 
Clematis columbiana See: Clematis occidentalis var. grosseserrata  | 
Clematis, Western | |||||||||||||
| Clematis hirsutissima var. hirsutissima | Sugarbowls | Ranunculaceae | Buttercup Family | Herb | Blue | Foothills, Montane, Subalpine | Openings, Woodlands | Apr-Jul | Opposite | Compound | Uneven | Long | ||
| Clematis ligusticifolia | Clematis, Virgin's Bower | Ranunculaceae | Buttercup Family | Vine, Herb | White | Foothills, Montane | Streamsides | Jun-Aug | Opposite | Compound | Uneven | Long | ||
| Clematis occidentalis var. grosseserrata | Clematis, Western | Ranunculaceae | Buttercup Family | Vine, Herb | Blue | Foothills, Montane | Woodlands | May-Jul | Opposite | Compound | Uneven | Long | ||
| 
Clementsia rhodantha See: Rhodiola rhodantha  | 
Queen's Crown; Rose Root; Rose Crown | |||||||||||||
| 
Cleome lutea See: Cleomella lutea  | 
Bee Plant, Yellow | |||||||||||||
| 
Cleome serrulata See: Cleomella serrulata  | 
Bee Plant, Rocky Mountain | |||||||||||||
| Cleomella | Bee Plant | Capparaceae (See Cleomaceae) | Round | |||||||||||
| Cleomella lutea | Bee Plant, Yellow | Cleomaceae | Cleome Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Shrublands, Openings, Disturbed | May-Jul | Alternate | Compound | Uneven | Round | ||
| Cleomella palmeriana | Bee Plant, Palmer's; Stinkweed, Rocky Mountain | Cleomaceae | Cleome Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands, Openings, Disturbed | Apr-Jun | Alternate | Compound | Uneven | Round | ||
| 
Cleomella palmeriana var. goodrichii See: Cleomella palmeriana  | 
Bee Plant, Palmer's; Stinkweed, Rocky Mountain | |||||||||||||
| Cleomella serrulata | Bee Plant, Rocky Mountain | Cleomaceae | Cleome Family | Herb | Red, Blue | Semi-Desert, Foothills, Montane | Openings, Streamsides, Disturbed, Woodlands | May-Sep | Alternate | Compound | Uneven | Round | ||
| Clinopodium vulgare | Basil, Wild | Lamiaceae (aka Labiatae) | Mint Family | Herb | Red | Montane | Openings, Rocky | Aug-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| 
Coeloglossum viride See: Dactylorhiza viridis  | 
Orchid, Long-bracted | |||||||||||||
| Coleogyne ramosissima | Blackbrush | Rosaceae | Rose Family | Shrub | Yellow | Semi-Desert | Shrublands, Woodlands | Apr-Jun | Opposite | Simple | Entire | Long | ||
| Collinsia parviflora | Blue-Eyed Mary | Plantaginaceae | Plantain Family | Herb | Blue | Foothills, Montane | Woodlands, Openings | Apr-Jul | Opposite, Whorled | Simple | Entire | Long, Round | ||
| Collomia grandiflora | Collomia, Large-flowered | Polemoniaceae | Phlox Family | Herb | White, Yellow | Foothills, Montane | Woodlands, Openings | Apr-Jul | Alternate | Simple | Entire | Long | ||
| Collomia linearis | Collomia, Linear-leaf | Polemoniaceae | Phlox Family | Herb | Red, Blue, White | Foothills, Montane | Openings, Woodlands | May-Aug | Alternate | Simple | Entire | Long | ||
| Comandra umbellata ssp. pallida | Toadflax, Bastard | Santalaceae | Sandalwood Family | Herb | White, Red | Semi-Desert, Foothills, Montane | Openings, Rocky, Woodlands, Shrublands | Apr-Jul | Alternate | Simple | Entire | Long | ||
| Comastoma tenellum | Samiland Gentian | Gentianaceae | Gentian Family | Herb | White, Blue | Montane, Subalpine, Alpine | Wetlands, Openings | Jul-Oct | Basal, Opposite | Simple | Entire | Long | ||
| Commelina dianthifolia | Dayflower | Commelinaceae | Spiderwort Family | Herb | Blue | Foothills, Montane | Rocky, Openings | Jul-Sep | Alternate | Simple | Entire | Long | ||
| Conioselinum scopulorum | Parsley, Hemlock; Lovage, Rock; Hemlock, Parsely | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Montane, Subalpine | Wetlands | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| Convolvulus arvensis | Bindweed | Convolvulaceae | Morning Glory Family | Vine, Herb | White, Red | Foothills, Montane | Openings, Disturbed, Woodlands | Apr-Oct | Alternate | Simple | Entire, Uneven | Long | ||
| 
Conyza schiedeana See: Laennecia schiedeana  | 
Woolwort, Pineland | |||||||||||||
| Corallorhiza maculata var. maculata | Coralroot, Spotted | Orchidaceae | Orchid Family | Herb | White, Yellow, Red | Foothills, Montane, Subalpine | Woodlands | May-Aug | Absent Or Reduced To Small Bracts | N/A | N/A | N/A | ||
| Corallorhiza maculata yellow variety | Coralroot, Spotted | Orchidaceae | Orchid Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands | May-Aug | Absent Or Reduced To Small Bracts | N/A | N/A | N/A | ||
| Corallorhiza striata | Coralroot, Striped | Orchidaceae | Orchid Family | Herb | White, Yellow, Blue | Foothills, Montane | Woodlands | May-Aug | Absent Or Reduced To Small Bracts | N/A | N/A | N/A | ||
| Corallorhiza wisteriana | Coralroot, Wister's | Orchidaceae | Orchid Family | Herb | White | Foothills, Montane | Woodlands | May-Jun | Absent Or Reduced To Small Bracts | N/A | N/A | N/A | ||
| Cordylanthus wrightii ssp. wrightii | Club Flower; Bird's Beak | Orobanchaceae | Broomrape Family | Herb | Yellow, Red | Semi-Desert, Foothills | Openings, Woodlands | Jul-Oct | Alternate | Simple, Compound | Entire | Long | ||
| 
Coriflora hirsutissima See: Clematis hirsutissima var. hirsutissima  | 
Sugarbowls | |||||||||||||
| Cornus alba ssp. stolonifera | Dogwood, Red-Osier | Cornaceae | Dogwood Family | Shrub | White | Foothills, Montane, Subalpine | Wetlands | May-Aug | Opposite | Simple | Entire | Long | ||
| 
Cornus stolonifera See: Cornus alba ssp. stolonifera  | 
Dogwood, Red-Osier | |||||||||||||
| Corydalis aurea ssp. aurea | Corydalis, Golden; Golden Smoke, Fumewort | Papaveraceae | Poppy Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | Apr-Aug | Alternate | Compound | Uneven | Long | ||
| Corydalis aurea ssp. occidentalis | Corydalis, Curvepod; Fumewort | Papaveraceae | Poppy Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Woodlands, Openings | Mar-Jul | Alternate | Compound | Uneven | Long | ||
| Corydalis caseana ssp. brandegeei | Corydalis, Case's | Papaveraceae | Poppy Family | Herb | White, Red | Montane, Subalpine | Wetlands, Openings, Woodlands | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| 
Corydalis curvisiliqua See: Corydalis aurea ssp. occidentalis  | 
Corydalis, Curvepod; Fumewort | |||||||||||||
| 
Coryphantha missouriensis See: Escobaria missouriensis  | 
Cactus, Missouri Pincushion | |||||||||||||
| 
Coryphantha vivipara See: Escobaria vivipara var. vivipara  | 
Cactus, Pincushion; Spinystar | |||||||||||||
| 
Crataegus douglasii var. rivularis See: Crataegus rivularis  | 
Hawthorn, River | |||||||||||||
| Crataegus rivularis | Hawthorn, River | Rosaceae | Rose Family | Tree | White | Foothills, Montane | Woodlands | May-Jul | Alternate | Simple | Uneven | Long | ||
| Crataegus sp | Hawthorn | Rosaceae | Rose Family | Tree | White | Foothills, Montane | Woodlands | May-Jul | Alternate | Simple | Uneven | Long | ||
| Crepis acuminata | Hawksbeard, Long-leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | May-Aug | Ray | Cluster | Basal, Alternate | Simple | Uneven | Long | 
| Crepis intermedia | Hawksbeard, Limestone | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | May-Aug | Ray | Cluster | Basal, Alternate | Simple | Uneven | Long | 
| Crepis occidentalis | Hawksbeard, Western | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | May-Jul | Ray | Mat | Basal | Simple | Uneven | Long | 
| Crepis runcinata | Hawksbeard, Fiddle-leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine, Alpine | Wetlands, Openings | May-Aug | Ray | Single | Basal | Simple | Uneven | Long | 
| 
Cryptantha cinerea See: Oreocarya suffruticosa  | 
Cat's Eye, Shrubby | |||||||||||||
| Cryptantha crassisepala var. elachantha | Cat's Eye, Thick-sepal | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Shrublands, Woodlands, Openings | Apr-Jun | Alternate | Simple | Entire | Long | ||
| 
Cryptantha flava See: Oreocarya flava  | 
Cryptantha, Yellow | |||||||||||||
| 
Cryptantha flavoculata See: Oreocarya flavoculata  | 
Cat's Eye, Little Yellow | |||||||||||||
| 
Cryptantha fulvocanescens See: Oreocarya fulvocanescens  | 
Cat's Eye, Gray | |||||||||||||
| 
Cryptantha gypsophila See: Oreocarya revealii  | 
Cat's Eye, Reveal's | |||||||||||||
| 
Cryptantha humilis See: Oreocarya humilis  | 
Cat's Eye, Humble | |||||||||||||
| Cryptantha minima | Cat's Eye, Little | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Woodlands, Shrublands, Openings | Apr-Jun | Alternate | Simple | Entire | Long | ||
| 
Cryptantha paradoxa See: Oreocarya paradoxa  | 
Cat's Eye, Paradox | |||||||||||||
| Cryptantha pterocarya | Cat's Eye, Winged-nut | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Woodlands, Shrublands, Openings | Apr-Jun | Alternate | Simple | Entire | Long | ||
| 
Cryptantha tenuis See: Oreocarya tenuis  | 
Cat's Eye, Slender | |||||||||||||
| Cryptogramma acrostichoides | Rock Brake | Pteridaceae | Maidenhair Fern Family | Fern | Foothills, Montane, Subalpine, Alpine | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| Cryptogramma stelleri | Rock Brake, Steller's | Pteridaceae | Maidenhair Fern Family | Fern | Montane, Subalpine | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| Cylindropuntia imbricata | Cholla, Cane; Cholla, Tree | Cactaceae | Cactus Family | Cactus, Herb | Red, Blue | Semi-Desert | Rocky, Openings, Shrublands | May-Jul | Modified To Spines | N/A | N/A | N/A | ||
| Cylindropuntia whipplei var. whipplei | Cholla, Whipple's | Cactaceae | Cactus Family | Cactus, Herb | Yellow, Green | Semi-Desert, Foothills | Openings, Shrublands, Woodlands | May-Jul | Modified To Spines | N/A | N/A | N/A | ||
| 
Cymopterus acaulis var. fendleri See: Cymopterus glomeratus var. fendleri  | 
Biscuitroot, Fendler's; Parsley, Fendler's Spring | |||||||||||||
| 
Cymopterus bulbosus See: Vesper bulbosus  | 
Biscuitroot, Spring; Parsley, Bulbous Spring | |||||||||||||
| 
Cymopterus constancei See: Vesper constancei  | 
Biscuitroot, Wide-winged; Parsley, Constance's Spring | |||||||||||||
| 
Cymopterus fendleri See: Cymopterus glomeratus var. fendleri  | 
Biscuitroot, Fendler's; Parsley, Fendler's Spring | |||||||||||||
| Cymopterus glomeratus var. fendleri | Biscuitroot, Fendler's; Parsley, Fendler's Spring | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Apr-Jun | Basal | Compound | Uneven | Long | ||
| Cymopterus lemmonii | Parsley, Mountain; Parsley, Lemmon's | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | May-Oct | Basal | Compound | Uneven | Long | ||
| Cymopterus newberryi | Biscuitroot, Newberry's; Parsley, Newberry's Spring | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert | Openings | Apr-Jun | Basal | Compound | Uneven | Long | ||
| Cymopterus purpureus | Biscuitroot, Purple; Parsley, Purple Spring | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Shrublands, Woodlands, Openings | Apr-Jun | Basal | Compound | Uneven | Long | ||
| Cymopterus terebinthinus var. albiflorus | Biscuitroot, Turpentine; Parsley, Rock Spring | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Jun | Basal | Compound | Uneven | Long | ||
| Cynoglossum officinale | Hound's Tongue | Boraginaceae | Forget-Me-Not Family | Herb | Blue, Red | Foothills, Montane | Disturbed, Openings | May-Jul | Alternate | Simple | Entire | Long | ||
| 
Cypripedium calceolus See: Cypripedium parviflorum var. pubescens  | 
Orchid, Lady's Slipper | |||||||||||||
| Cypripedium parviflorum var. pubescens | Orchid, Lady's Slipper | Orchidaceae | Orchid Family | Herb | Yellow | Foothills, Montane | Wetlands, Openings | May-Jul | Alternate | Simple | Entire | Long | ||
| 
Cyrtorhyncha cymbalaria See: Halerpestus cymbalaria  | 
Buttercup, Alkali; Buttercup, Marsh | |||||||||||||
| Cystopteris fragilis | Fern, Brittle | Cystopteridaceae | Wood Fern Family | Fern | Foothills, Montane, Subalpine | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| Cystopteris reevesiana | Fern, Reeves' Brittle; Fern, Reeves' Brittle Bladder | Cystopteridaceae | Wood Fern Family | Fern | Foothills, Montane, Subalpine | Rocky, Openings | Basal | Compound | Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dactylorhiza viridis | Orchid, Long-bracted | Orchidaceae | Orchid Family | Herb | Green | Montane | Woodlands | May-Aug | Alternate | Simple | Entire | Long | ||
| Dalea candida var. oligophylla | Clover, Western Prairie; Dalea, Silvery | Fabaceae (aka Leguminosae) | Pea Family | Shrub, Herb | White | Semi-Desert, Foothills | Openings | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| 
Dalea occidentalis See: Dalea candida var. oligophylla  | 
Clover, Western Prairie; Dalea, Silvery | |||||||||||||
| Dasiphora fruticosa ssp. floribunda | Cinquefoil, Shrubby | Rosaceae | Rose Family | Shrub | Yellow | Montane, Subalpine, Alpine | Openings | Jun-Oct | Alternate | Compound | Uneven | Long | ||
| Datura wrightii | Datura, Sacred; Jimsonweed; Indianapple | Solanaceae | Nightshade Family | Herb | White | Semi-Desert, Foothills | Openings, Disturbed | May-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| 
Delphinium andersonii See: Delphinium scaposum var. scaposum  | 
Larkspur, Desert; Larkspur, Bare-stem; Larkspur, Tall Mountain | |||||||||||||
| Delphinium barbeyi | Larkspur, Subalpine; Larkspur, Barbey's | Ranunculaceae | Buttercup Family | Herb | Blue, White | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Sep | Alternate | Simple | Uneven | Round | ||
| 
Delphinium nelsonii See: Delphinium nuttallianum  | 
Larkspur, Dwarf; Larkspur, Nuttall's | |||||||||||||
| Delphinium nuttallianum | Larkspur, Dwarf; Larkspur, Nuttall's | Ranunculaceae | Buttercup Family | Herb | Blue | Foothills, Montane | Woodlands, Openings | Apr-Jul | Basal, Alternate | Simple | Uneven | Round | ||
| Delphinium robustum | Larkspur, Robust | Ranunculaceae | Buttercup Family | Herb | Blue | Montane, Subalpine | Woodlands, Openings | Jun-Aug | Alternate | Simple | Uneven | Round | ||
| Delphinium scaposum var. scaposum | Larkspur, Desert; Larkspur, Bare-stem; Larkspur, Tall Mountain | Ranunculaceae | Buttercup Family | Herb | Blue, White | Semi-Desert, Foothills | Woodlands, Openings | Apr-Jun | Basal | Simple | Uneven | Round | ||
| Descurainia incana | Tansy Mustard | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Montane, Subalpine | Disturbed, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| 
Descurainia incana var. incisa See: Descurainia incisa  | 
Tansy Mustard | |||||||||||||
| Descurainia incisa | Tansy Mustard | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert, Foothills, Montane, Subalpine, Alpine | Disturbed, Openings, Woodlands, Shrublands | May-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Descurainia obtusa | Tansy Mustard | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Descurainia sophia | Flixweed | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Woodlands, Shrublands, Openings | Mar-Sep | Basal, Alternate | Compound | Uneven | Long | ||
| Dieteria bigelovii var. bigelovii | Aster, Bigelow's Tansy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red | Semi-Desert, Foothills, Montane, Subalpine | Disturbed, Openings | May-Nov | Both | Single | Alternate | Simple | Uneven, Entire | Long | 
| Dieteria canescens | Aster, Gray Tansy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red | Semi-Desert, Foothills, Montane, Subalpine | Disturbed, Openings | May-Nov | Both | Single | Basal, Alternate | Simple | Uneven, Entire | Long | 
| Dimorphocarpa wislizeni | Spectacle Pod | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert | Disturbed, Openings | Mar-Jun | Alternate | Simple | Uneven | Long | ||
| 
Disporum trachycarpum See: Prosartes trachycarpa  | 
Fairybells | |||||||||||||
| 
Distegia involucrata See: Lonicera involucrata  | 
Twinberry | |||||||||||||
| 
Dithyrea wislizeni See: Dimorphocarpa wislizeni  | 
Spectacle Pod | |||||||||||||
| 
Dodecatheon pulchellum See: Primula pauciflora  | 
Shooting Star | |||||||||||||
| Draba aurea | Draba, Golden | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| 
Draba breweri See: Draba cana  | 
Draba, Brewer's; Whitlow Grass, Hoary | |||||||||||||
| Draba cana | Draba, Brewer's; Whitlow Grass, Hoary | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Aug | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Draba crassa | Draba, Thick-leaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Alpine | Openings, Rocky | Jun-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Draba crassifolia | Draba, Snowbed | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Subalpine, Alpine | Woodlands, Openings, Rocky | Jun-Sep | Basal | Simple | Entire | Long | ||
| 
Draba cuneifolia See: Tomostima cuneifolia  | 
Stonecress, Wedge-leaf | |||||||||||||
| Draba fladnizensis var. pattersonii | Draba, Fladnitz; Draba, Austrian | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Yellow | Alpine | Rocky, Openings | Jun-Aug | Basal | Simple | Entire, Uneven | Long | ||
| Draba graminea | Draba, Grass-like; Whitlow Grass, Rocky Mountain | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Alpine | Rocky, Openings | Jun-Aug | Basal | Simple | Entire | Long | ||
| 
Draba reptans See: Tomostima reptans  | 
Whitlow Grass, Carolina; Stonecress, Carolina | |||||||||||||
| Draba spectabilis | Draba, Showy | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Draba streptobrachia | Draba, Twisted; Whitlow Grass, Alpine | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Alpine | Openings, Rocky | Jul-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Dracocephalum parviflorum | Dragonhead | Lamiaceae (aka Labiatae) | Mint Family | Herb | Red | Foothills, Montane | Shrublands, Woodlands, Openings | May-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| 
Drymocallis arguta See: Drymocallis convallaria  | 
Woodbeauty, Cream | |||||||||||||
| Drymocallis convallaria | Woodbeauty, Cream | Rosaceae | Rose Family | Herb | White, Yellow | Foothills, Montane, Subalpine | Openings, Woodlands | May-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Dryopteris filix-mas ssp. filix-mas | Fern, Male | Dryopteridaceae | Wood Fern Family | Fern | Montane, Subalpine | Rocky, Wetlands | Basal | Compound | Uneven | Long | ||||
| 
Dugaldia hoopesii See: Hymenoxys hoopesii  | 
Sneezeweed, Orange | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Echinocereus fendleri var. fendleri | Cactus, Fendler's Hedgehog | Cactaceae | Cactus Family | Cactus, Herb | Red, Blue | Semi-Desert | Woodlands, Shrublands, Openings | Apr-Jun | Modified To Spines | N/A | N/A | N/A | ||
| Echinocereus mojavensis | Cactus, Claret Cup; Cactus, Hedgehog; Cactus, Kingcup | Cactaceae | Cactus Family | Cactus, Herb | Red | Semi-Desert, Foothills | Woodlands, Openings | Apr-Jun | Modified To Spines | N/A | N/A | N/A | ||
| 
Ehinocereus triglochidiatus var. mojavensis See: Echinocereus mojavensis  | 
Cactus, Claret Cup; Cactus, Hedgehog; Cactus, Kingcup | |||||||||||||
| Elaeagnus angustifolia | Olive, Russian | Elaeagnaceae | Oleaster Family | Tree | Yellow | Semi-Desert, Foothills, Montane | Streamsides, Disturbed | Alternate | Compound | Uneven | Long | |||
| 
Encelia frutescens See: Encelia resinifera  | 
Brittlebush, Sticky | |||||||||||||
| Encelia resinifera | Brittlebush, Sticky | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert | Openings, Woodlands, Shrublands | May-Jul | Both | Cluster | Alternate | Simple | Entire | Long, Round | 
| Enceliopsis nudicaulis | Nakedstem Sunray | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Openings, Woodlands, Shrublands | Apr-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long, Round | 
| 
Endotropis smithii See: Rhamnus smithii  | 
Buckthorn, Smith's | |||||||||||||
| Ephedra cutleri | Mormon Tea, Cutler's; Joint-fir, Cutler's | Ephedraceae | Ephedra Family | Shrub | Yellow | Semi-Desert | Openings | Opposite, Absent | Simple | Entire | Long | |||
| Ephedra torreyana | Mormon Tea, Torrey's; Joint-fir, Torrey's | Ephedraceae | Ephedra Family | Shrub | Yellow | Semi-Desert, Foothills | Woodlands, Shrublands | Whorled, Absent | Simple | Entire | Long | |||
| Ephedra viridis | Mormon Tea, Green; Joint-fir, Green | Ephedraceae | Ephedra Family | Shrub | Yellow | Semi-Desert, Foothills | Woodlands, Shrublands | Opposite, Absent | Simple | Entire | Long | |||
| 
Ephedra viridis var. viscida See: Ephedra cutleri  | 
Mormon Tea, Cutler's; Joint-fir, Cutler's | |||||||||||||
| 
Epilobium alpinum See: Epilobium anagallidifolium  | 
Willowherb, Alpine | |||||||||||||
| Epilobium anagallidifolium | Willowherb, Alpine | Onagraceae | Evening Primrose Family | Herb | Red, White, Blue | Montane, Subalpine, Alpine | Rocky, Wetlands, Openings | Jun-Sep | Opposite, Alternate | Simple | Entire | Long | ||
| Epilobium brachycarpum | Willowherb, Short Fruit | Onagraceae | Evening Primrose Family | Herb | Red, White, Blue | Foothills, Montane | Disturbed, Woodlands, Openings | Jun-Aug | Opposite, Alternate | Simple | Entire, Uneven | Long | ||
| Epilobium ciliatum | Willowherb, Fringed | Onagraceae | Evening Primrose Family | Herb | Red, White, Blue | Foothills, Montane, Subalpine, Alpine | Disturbed, Openings, Wetlands, Streamsides | May-Oct | Opposite, Alternate | Simple | Entire | Long | ||
| Epilobium hornemannii ssp. hornemannii | Willowherb, Hornemann's | Onagraceae | Evening Primrose Family | Herb | Red, White, Blue | Foothills, Montane, Subalpine, Alpine | Openings, Streamsides | Jun-Sep | Opposite, Alternate | Simple | Entire | Long | ||
| 
Epilobium paniculatum See: Epilobium brachycarpum  | 
Willowherb, Short Fruit | |||||||||||||
| Epipactis gigantea | Helleborine, Giant | Orchidaceae | Orchid Family | Herb | Red, Orange, Yellow | Semi-Desert, Foothills | Wetlands | Apr-Aug | Alternate | Simple | Entire | Long | ||
| Equisetum arvense | Horsetails, Field | Equisetaceae | Horsetail Family | Fern | Foothills, Montane, Subalpine | Streamsides, Wetlands | Whorled, Absent | Simple | Uneven | Long | ||||
| 
Equisetum hyemale See: Equisetum praealtum  | 
Rush, Scouring | |||||||||||||
| Equisetum laevigatum | Rush, Smooth Scouring | Equisetaceae | Horsetail Family | Fern | Foothills, Montane | Streamsides, Wetlands | Whorled, Absent | Simple | Uneven | Long | ||||
| Equisetum praealtum | Rush, Scouring | Equisetaceae | Horsetail Family | Fern | Foothills, Montane, Subalpine | Streamsides, Wetlands | Whorled, Absent | Simple | Uneven | Long | ||||
| Eremocrinum | Lily | Agavaceae (See Asparagaceae) | Asparagus Family | Long | ||||||||||
| Eremocrinum albomarginatum | Lily, Sand | Asparagaceae | Asparagus Family | Herb | White | Semi-Desert | Shrublands, Openings | Apr-Jun | Basal | Simple | Entire | Long | ||
| Eremogone congesta var. congesta | Sandwort, Ball Head | Caryophyllaceae | Pink Family | Herb | White | Foothills, Montane, Subalpine | Woodlands, Openings, Rocky | May-Aug | Basal, Opposite | Simple | Entire | Long | ||
| Eremogone eastwoodiae var. adenophora | Sandwort, Eastwood's | Caryophyllaceae | Pink Family | Herb | White, Yellow | Semi-Desert, Foothills | Shrublands, Openings | Apr-Jul | Basal, Opposite | Simple | Entire | Long | ||
| Eremogone fendleri | Sandwort, Fendler's | Caryophyllaceae | Pink Family | Herb | White | Montane, Subalpine, Alpine | Woodlands, Openings, Rocky | Jun-Sep | Basal, Opposite | Simple | Entire | Long | ||
| 
Eremogone kingii See: Eremogone eastwoodiae var. adenophora  | 
Sandwort, Eastwood's | |||||||||||||
| Eriastrum sparsiflorum | Starflower, Sparse | Polemoniaceae | Phlox Family | Herb | Blue, White | Semi-Desert | Shrublands | Apr-Jun | Alternate | Simple | Entire | Long | ||
| Ericameria nauseosa variety graveolens | Rabbitbrush; Rabbitbrush, Rubber; Rabbitbrush, Golden; Chamisa | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Semi-Desert, Foothills | Openings, Woodlands, Shrublands | Jun-Nov | Disk | Cluster | Alternate | Simple | Entire | Long | 
| Ericameria parryi | Rabbitbrush, Parry's | Asteraceae (aka Compositae) | Sunflower Family | Shrub | Yellow | Foothills, Montane | Openings, Woodlands, Shrublands | Aug-Oct | Disk | Cluster | Alternate | Simple | Entire | Long | 
| Erigeron abajoensis | Fleabane, Abajo; Daisy, Abajo | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White | Montane, Subalpine | Rocky, Openings | Jun-Sep | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron aphanactis var. aphanactis | Fleabane, Rayless; Daisy, Rayless | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Openings, Woodlands, Shrublands | May-Sep | Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron argentatus | Fleabane, Silvery; Daisy, Silvery | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Semi-Desert, Foothills | Openings, Shrublands | May-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron bellidiastrum | Fleabane, Pretty; Daisy, Pretty | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills | Shrublands, Woodlands | May-Sep | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Erigeron canus | Fleabane, Gray; Daisy, Gray; Fleabane, Hoary | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Yellow | Foothills, Montane | Shrublands, Openings | May-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| 
Erigeron colomexicanus See: Erigeron tracyi  | 
Fleabane, Tracy's; Daisy, Tracy's | |||||||||||||
| Erigeron compositus | Fleabane, Composite; Daisy, Composite; Daisy, Cutleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White | Montane, Subalpine, Alpine | Openings | May-Aug | Both | Mat | Basal, Alternate | Simple | Uneven | Long | 
| Erigeron concinnus | Fleabane, Hairy; Daisy, Hairy; Fleabane, Navajo | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills | Shrublands, Openings | Apr-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron coulteri | Fleabane, Coulter's; Daisy, Coulter's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Oct | Both | Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Erigeron divergens | Fleabane, Spreading; Daisy, Spreading | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Foothills, Montane | Openings, Disturbed | Apr-Nov | Both | Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Erigeron eatonii | Daisy, Eaton's; Fleabane, Eaton's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Openings, Woodlands | May-Aug | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Erigeron elatior | Fleabane, Tall; Daisy, Tall | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Montane, Subalpine, Alpine | Openings | Jul-Sep | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Erigeron eximius | Fleabane, Splendid; Daisy, Splendid | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White | Montane, Subalpine | Woodlands | Jul-Oct | Both | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Erigeron flagellaris | Fleabane, Whiplash; Daisy, Whiplash; Fleabane, Trailing | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Foothills, Montane, Subalpine | Openings | Apr-Nov | Both | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Erigeron formosissimus | Fleabane, Beautiful; Daisy, Beautiful | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red | Montane, Subalpine | Openings | Jun-Oct | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron glacialis var. glacialis | Fleabane, Glacier; Daisy, Glacier | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Subalpine, Alpine | Woodlands, Openings | Jun-Oct | Both | Mat, Single | Basal, Alternate | Simple | Entire | Long | 
| Erigeron grandiflorus | Daisy, Rocky Mountain Alpine; Daisy, Large-flowered | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Subalpine, Alpine | Rocky, Openings | Jun-Sep | Both | Mat, Single | Basal, Alternate | Simple | Entire | Long | 
| Erigeron leiomerus | Fleabane, Rockslide; Daisy, Rockslide | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Montane, Subalpine, Alpine | Rocky, Openings | Jun-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron lonchophyllus | Fleabane, Lance-leaf; Daisy, Lance-leaf; Fleabane, Short-ray | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane, Subalpine | Rocky, Openings | Jun-Sep | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Erigeron melanocephalus | Fleabane, Blackheaded; Daisy, Blackheaded | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Subalpine, Alpine | Rocky, Openings | Jul-Sep | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| 
Erigeron peregrinus See: Erigeron glacialis var. glacialis  | 
Fleabane, Glacier; Daisy, Glacier | |||||||||||||
| Erigeron pinnatisectus | Fleabane, Cutleaf; Fleabane, Featherleaf; Daisy, Cutleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, White, Red | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron pulcherrimus | Fleabane, Beautiful; Daisy, Beautiful; Daisy, Basin | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert | Openings | May-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| 
Erigeron pumilus See: Erigeron concinnus  | 
Fleabane, Hairy; Daisy, Hairy; Fleabane, Navajo | |||||||||||||
| Erigeron sivinskii | Fleabane, Sivinski's; Daisy, Sivinski's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert | Openings, Woodlands, Shrublands | Apr-Jun | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron speciosus | Fleabane, Showy; Daisy, Showy; Daisy, Aspen | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red | Montane, Subalpine | Openings | Jun-Oct | Both | Mat, Cluster | Basal, Alternate | Simple | Entire | Long | 
| Erigeron subtrinervis | Fleabane, Three-nerved; Daisy, Three-nerved | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red | Montane, Subalpine | Openings | Jun-Oct | Both | Mat, Cluster | Basal, Alternate | Simple | Entire | Long | 
| Erigeron tracyi | Fleabane, Tracy's; Daisy, Tracy's | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills | Woodlands, Openings | Apr-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron ursinus | Fleabane, Bear River; Daisy, Bear River | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, Blue, White | Montane, Subalpine, Alpine | Woodlands, Openings | Jul-Sep | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron utahensis | Fleabane, Utah; Daisy, Utah | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Semi-Desert | Shrublands, Woodlands, Rocky, Openings | Apr-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Erigeron vetensis | Fleabane, Early Bluetop; Daisy, Early Bluetop | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red, White | Montane, Subalpine, Alpine | Woodlands, Rocky, Openings | May-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Eriogonum alatum | Buckwheat, Winged | Polygonaceae | Buckwheat Family | Herb | Yellow, Green | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | May-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Eriogonum arcuatum var. arcuatum | Buckwheat, Curved | Polygonaceae | Buckwheat Family | Herb | Yellow | Foothills, Montane | Shrublands, Openings, Woodlands | Jun-Sep | Basal | Simple | Entire | Long | ||
| Eriogonum cernuum | Buckwheat, Nodding | Polygonaceae | Buckwheat Family | Herb | White | Semi-Desert, Foothills | Shrublands, Woodlands | May-Oct | Basal, Alternate | Simple | Entire | Round, Long | ||
| Eriogonum corymbosum var. orbiculatum | Buckwheat, Fremont's Rimrock | Polygonaceae | Buckwheat Family | Shrub, Herb | White | Semi-Desert, Foothills | Shrublands, Woodlands, Rocky, Openings | Jul-Oct | Basal, Alternate | Simple | Uneven | Round | ||
| Eriogonum corymbosum var. velutinum | Buckwheat, Fremont's Velvet | Polygonaceae | Buckwheat Family | Shrub, Herb | White | Semi-Desert | Shrublands, Woodlands, Rocky, Openings | Jul-Oct | Basal, Alternate | Simple | Entire | Long | ||
| 
Eriogonum flexum See: Stenogonum flexum  | 
Buckwheat, Flexible | |||||||||||||
| Eriogonum hookeri | Buckwheat, Hooker's | Polygonaceae | Buckwheat Family | Herb | Yellow, Red | Semi-Desert, Foothills | Shrublands, Woodlands, Rocky, Openings | Jun-Oct | Basal | Simple | Entire | Long | ||
| Eriogonum inflatum | Trumpets, Desert | Polygonaceae | Buckwheat Family | Herb | Yellow | Semi-Desert | Openings, Shrublands | Apr-Oct | Basal | Simple | Entire | Round, Long | ||
| Eriogonum jamesii | Buckwheat, James' | Polygonaceae | Buckwheat Family | Herb | Yellow, White, Red | Semi-Desert, Foothills, Montane | Shrublands, Openings, Woodlands | Jun-Oct | Basal | Simple | Entire | Long | ||
| Eriogonum leptocladon | Buckwheat, Eastwood's | Polygonaceae | Buckwheat Family | Herb | White, Red | Semi-Desert | Shrublands, Openings, Woodlands | Jun-Oct | Basal, Alternate | Simple | Entire | Long | ||
| Eriogonum leptophyllum | Buckwheat, Slenderleaf | Polygonaceae | Buckwheat Family | Herb | White, Red | Foothills, Montane | Shrublands, Openings | Jun-Oct | Alternate | Simple | Entire | Long | ||
| Eriogonum lonchophyllum | Buckwheat, Lanceleaf | Polygonaceae | Buckwheat Family | Herb | White, Red | Foothills, Montane | Shrublands, Openings | Jun-Oct | Basal, Alternate | Simple | Entire | Long | ||
| Eriogonum microthecum | Buckwheat, Slender | Polygonaceae | Buckwheat Family | Shrub, Herb | White, Red | Semi-Desert, Foothills | Shrublands, Openings | Jun-Nov | Alternate | Simple | Entire | Long | ||
| Eriogonum ovalifolium | Buckwheat, Cushion | Polygonaceae | Buckwheat Family | Herb | White, Red | Semi-Desert, Foothills | Woodlands, Openings | Apr-Aug | Basal | Simple | Entire | Long, Round | ||
| Eriogonum palmerianum | Buckwheat, Palmer's | Polygonaceae | Buckwheat Family | Herb | White, Red | Semi-Desert | Shrublands, Woodlands | Mar-Oct | Basal | Simple | Entire | Long, Round | ||
| Eriogonum racemosum | Buckwheat, Red Root | Polygonaceae | Buckwheat Family | Herb | White, Red | Foothills, Montane, Subalpine | Openings, Woodlands, Shrublands | Jun-Oct | Basal | Simple | Entire | Long, Round | ||
| 
Eriogonum salsuginosum See: Stenogonum salsuginosum  | 
Buckwheat, Salty | |||||||||||||
| Eriogonum subalpinum | Buckwheat, Subalpine | Polygonaceae | Buckwheat Family | Herb | White | Montane, Subalpine, Alpine | Woodlands, Openings, Shrublands | Jun-Sep | Basal | Simple | Entire | Long, Round | ||
| Eriogonum umbellatum | Sulfur Flower | Polygonaceae | Buckwheat Family | Herb | Yellow, Red | Semi-Desert, Foothills, Montane, Subalpine | Openings | May-Oct | Basal | Simple | Entire | Long, Round | ||
| 
Eriogonum umbellatum var. majus See: Eriogonum subalpinum  | 
Buckwheat, Subalpine | |||||||||||||
| Erodium cicutarium | Filaree; Storksbill | Geraniaceae | Geranium Family | Herb | Red | Semi-Desert, Foothills, Montane | Openings, Shrublands, Disturbed | Mar-Nov | Basal | Compound | Uneven | Long | ||
| Erysimum capitatum | Wallflower, Western | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow, Blue, Red, Orange | Semi-Desert, Foothills, Montane, Alpine | Woodlands, Openings | Apr-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Erythranthe eastwoodiae | Monkeyflower, Eastwood's | Phrymaceae | Lopseed Family | Herb | Red | Semi-Desert | Wetlands | May-Oct | Opposite | Simple | Uneven | Long | ||
| Erythranthe guttata | Monkeyflower, Yellow | Phrymaceae | Lopseed Family | Herb | Yellow | Montane, Subalpine | Streamsides | May-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| 
Erythranthe minor See: Erythranthe guttata  | 
Monkeyflower, Yellow | |||||||||||||
| Erythranthe rubella | Monkey Flower, Red Stem | Phrymaceae | Lopseed Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | Apr-Aug | Opposite | Simple | Entire | Long | ||
| Erythranthe suksdorfii | Monkey Flower, Suksdorf's | Phrymaceae | Lopseed Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | Apr-Aug | Opposite | Simple | Entire | Long | ||
| Erythranthe tilingii | Monkey Flower, Tiling's; Monkeyflower, Subalpine | Phrymaceae | Lopseed Family | Herb | Yellow | Montane, Subalpine, Alpine | Streamsides | Jun-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| 
Erythrocoma triflora See: Geum triflorum  | 
Prairie Smoke; Old-Man's-Whiskers | |||||||||||||
| Erythronium grandiflorum | Lily, Glacier; Violet, Dogtooth | Liliaceae | Lily Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings | Apr-Jul | Basal | Simple | Entire | Long | ||
| Escobaria missouriensis | Cactus, Missouri Pincushion | Cactaceae | Cactus Family | Cactus, Herb | Yellow, Red | Semi-Desert, Foothills | Openings | Apr-Jun | Modified To Spines | N/A | N/A | N/A | ||
| Escobaria vivipara var. vivipara | Cactus, Pincushion; Spinystar | Cactaceae | Cactus Family | Cactus, Herb | Red | Semi-Desert, Foothills | Openings | Apr-Jul | Modified To Spines | N/A | N/A | N/A | ||
| Eucephalus engelmannii | Aster, Engelmann's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Montane, Subalpine | Openings, Woodlands | Jul-Sep | Both | Single | Alternate | Simple | Entire | Long | 
| 
Eucephalus glaucus See: Herrickia glauca var. glauca  | 
Aster, Waxy; Aster, Gray | |||||||||||||
| Euphorbia brachycera | Spurge, Shorthorn | Euphorbiaceae | Spurge Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Woodlands | May-Aug | Alternate, Whorled | Simple | Entire | Round, Long | ||
| Euphorbia fendleri | Spurge, Fendler's; Sandmat, Fendler's | Euphorbiaceae | Spurge Family | Herb | White | Semi-Desert, Foothills | Openings | May-Sep | Opposite | Simple | Entire | Round, Long | ||
| Euphorbia glyptosperma | Spurge, Carved Seed | Euphorbiaceae | Spurge Family | Herb | White | Semi-Desert, Foothills | Openings | Jun-Sep | Opposite | Simple | Uneven | Long | ||
| Euphorbia serpillifolia var. serpillifolia | Spurge, Thyme-leaf | Euphorbiaceae | Spurge Family | Herb | White | Semi-Desert, Foothills | Shrublands, Woodlands, Disturbed | May-Aug | Opposite | Simple | Uneven | Long | ||
| Euphrosyne acerosa | Copperweed | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Rocky, Openings | Aug-Sep | Disk | Single | Alternate | Simple | Entire, Uneven | Long | 
| 
Eurybia glauca See: Herrickia glauca var. glauca  | 
Aster, Waxy; Aster, Gray | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fallugia paradoxa | Apache Plume | Rosaceae | Rose Family | Shrub | White | Semi-Desert, Foothills | Shrublands, Openings | May-Sep | Alternate | Compound | Uneven | Long | ||
| Fendlera rupicola | Fendlerbush; Cliff Fendlerbush | Hydrangeaceae | Hydrangea Family | Shrub | White | Semi-Desert, Foothills, Montane | Woodlands, Shrublands, Rocky, Openings | May-Jun | Opposite | Simple | Entire | Long | ||
| Forestiera pubescens | Olive, Desert; Privet, New Mexico; Coyote Bush | Oleaceae | Olive Family | Tree | Yellow | Semi-Desert | Woodlands, Shrublands | Apr-Jun | Opposite | Simple | Entire, Uneven | Long | ||
| 
Forsellesia meionandra See: Glossopetalon spinescens var. meionandrum  | 
Greasebush | |||||||||||||
| Fragaria vesca ssp. bracteata | Strawberry, Little | Rosaceae | Rose Family | Herb | White | Montane, Subalpine | Openings | May-Aug | Basal | Compound | Uneven | Round | ||
| Fragaria virginiana ssp. glauca | Strawberry, Virginia | Rosaceae | Rose Family | Herb | White | Montane, Subalpine | Openings | Apr-Aug | Basal | Compound | Uneven | Round | ||
| 
Frangula betulifolia ssp. obovata See: Frangula obovata  | 
Buckthorn, Pearleaf | |||||||||||||
| Frangula obovata | Buckthorn, Pearleaf | Rhamnaceae | Buckthorn Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Rocky, Openings | May-Jun | Alternate | Simple | Entire | Long | ||
| Frankenia jamesii | Frankenia; Seaheath | Frankeniaceae | Frankenia Family | Shrub, Herb | White | Semi-Desert, Foothills | Openings, Rocky | May-Jul | Opposite | Simple | Entire | Long | ||
| Frasera albomarginata | Frasera, White-margined | Gentianaceae | Gentian Family | Herb | Green | Semi-Desert | Openings, Shrublands, Woodlands | Apr-Jun | Basal, Opposite | Simple | Entire | Long | ||
| Frasera paniculata | Frasera, Utah; Swertia, Utah | Gentianaceae | Gentian Family | Herb | Green | Semi-Desert, Foothills | Openings, Shrublands | May-Sep | Basal, Opposite | Simple | Entire | Long | ||
| Frasera speciosa | Monument Plant; Elkweed; Gentian, Green | Gentianaceae | Gentian Family | Herb | Green, White | Foothills, Montane, Subalpine, Alpine | Openings | Jun-Aug | Basal, Whorled | Simple | Entire | Long | ||
| 
Frasera utahensis See: Frasera paniculata  | 
Frasera, Utah; Swertia, Utah | |||||||||||||
| Fraxinus anomala var. anomala | Ash, Single Leaf | Oleaceae | Olive Family | Tree | Yellow | Semi-Desert | Woodlands, Openings | Mar-May | Opposite | Simple | Entire | Long, Round | ||
| Fritillaria atropurpurea | Lily, Chocolate | Liliaceae | Lily Family | Herb | Green | Foothills, Montane | Woodlands, Openings | May-Jul | Whorled, Alternate, Opposite | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gaillardia aristata | Blanketflower | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow, Blue | Semi-Desert, Foothills, Montane | Openings | May-Nov | Both | Single, Cluster | Alternate, Basal | Simple | Entire, Uneven | Long | 
| Gaillardia pinnatifida | Blanketflower, Cut-leaf; Blanketflower, Hopi | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow, Red | Semi-Desert, Foothills | Openings | Apr-Jul | Both | Single, Cluster | Alternate | Simple | Entire, Uneven | Long | 
| Galium boreale | Bedstraw, Northern | Rubiaceae | Madder Family | Herb | White | Montane, Subalpine | Woodlands, Openings | May-Aug | Whorled | Simple | Entire | Long | ||
| Galium coloradoense | Bedstraw, Colorado; Bedstraw, Shrubby | Rubiaceae | Madder Family | Herb | Yellow, White, Green | Semi-Desert, Foothills | Shrublands, Woodlands | May-Jul | Whorled | Simple | Entire | Long | ||
| 
Galium multiflorum var. coloradoense See: Galium coloradoense  | 
Bedstraw, Colorado; Bedstraw, Shrubby | |||||||||||||
| 
Galium septentrionale See: Galium boreale  | 
Bedstraw, Northern | |||||||||||||
| Galium triflorum | Bedstraw, Fragrant | Rubiaceae | Madder Family | Herb | White, Green | Montane, Subalpine | Woodlands | May-Aug | Whorled | Simple | Entire | Long | ||
| 
Gastrolychnis drummondii See: Silene drummondii  | 
Catchfly, Drummond's | |||||||||||||
| 
Gaura mollis See: Oenothera curtiflora  | 
Velvetweed | |||||||||||||
| 
Gaura parviflora See: Oenothera curtiflora  | 
Velvetweed | |||||||||||||
| Gayophytum diffusum ssp. parviflorum | Groundsmoke, Spreading | Onagraceae | Evening Primrose Family | Herb | White | Foothills, Montane, Subalpine | Openings, Woodlands, Shrublands | Jun-Sep | Alternate | Simple | Entire | Long | ||
| Gentiana affinis | Gentian, Bottle; Gentian, Rocky Mountain | Gentianaceae | Gentian Family | Herb | Blue | Montane, Subalpine | Wetlands, Openings | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Gentiana algida | Gentian, Arctic | Gentianaceae | Gentian Family | Herb | White | Subalpine, Alpine | Openings, Streamsides | Jul-Sep | Opposite, Basal | Simple | Entire | Long | ||
| 
Gentiana barbellata See: Gentianopsis barbellata  | 
Gentian, Little Fringed | |||||||||||||
| Gentiana parryi | Gentian, Parry's; Gentian, Bottle | Gentianaceae | Gentian Family | Herb | Blue | Montane, Subalpine, Alpine | Openings | Jul-Oct | Opposite | Simple | Entire | Long | ||
| Gentiana prostrata | Gentian, Siberian; Gentian, Moss; Gentian, Pygmy | Gentianaceae | Gentian Family | Herb | Blue | Alpine | Rocky, Openings | Jun-Aug | Opposite, Basal | Simple | Entire | Long | ||
| 
Gentiana thermalis See: Gentianopsis thermalis  | 
Gentian, Fringed | |||||||||||||
| 
Gentianella acuta See: Gentianella amarella ssp. acuta  | 
Gentian, Little; Felwort | |||||||||||||
| Gentianella amarella ssp. acuta | Gentian, Little; Felwort | Gentianaceae | Gentian Family | Herb | Blue, Red, White | Montane, Subalpine, Alpine | Woodlands, Openings | Jun-Sep | Opposite, Basal | Simple | Entire | Long | ||
| Gentianella amarella ssp. heterosepala | Gentian, Little; Felwort | Gentianaceae | Gentian Family | Herb | Blue, Red, White | Montane, Subalpine, Alpine | Woodlands, Openings | Jun-Sep | Opposite, Basal | Simple | Entire | Long | ||
| 
Gentianella heterosepala See: Gentianella amarella ssp. heterosepala  | 
Gentian, Little; Felwort | |||||||||||||
| 
Gentianella tenella See: Comastoma tenellum  | 
Samiland Gentian | |||||||||||||
| 
Gentianodes algida See: Gentiana algida  | 
Gentian, Arctic | |||||||||||||
| Gentianopsis barbellata | Gentian, Little Fringed | Gentianaceae | Gentian Family | Herb | Blue | Montane, Subalpine, Alpine | Openings | Jul-Oct | Opposite, Basal | Simple | Entire | Long | ||
| 
Gentianopsis detonsa See: Gentianopsis thermalis  | 
Gentian, Fringed | |||||||||||||
| Gentianopsis thermalis | Gentian, Fringed | Gentianaceae | Gentian Family | Herb | Blue | Montane, Subalpine | Openings, Wetlands | Jul-Sep | Opposite, Basal | Simple | Entire | Long | ||
| Geranium caespitosum | Geranium, Purple; Cranesbill, Purple | Geraniaceae | Geranium Family | Herb | Red | Foothills, Montane, Subalpine | Woodlands | Jun-Sep | Basal, Opposite | Simple | Uneven | Round | ||
| Geranium richardsonii | Geranium, White; Cranesbill, White | Geraniaceae | Geranium Family | Herb | White, Red | Foothills, Montane, Subalpine | Woodlands | Jun-Sep | Opposite | Simple | Uneven | Round | ||
| Geranium viscosissimum | Geranium, Sticky; Cranesbill, Sticky | Geraniaceae | Geranium Family | Herb | Red | Foothills, Montane | Woodlands | Jun-Aug | Basal, Opposite | Simple | Uneven | Round | ||
| Geum aleppicum | Avens, Yellow | Rosaceae | Rose Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings | Jun-Sep | Basal, Alternate | Compound | Uneven | Long | ||
| Geum macrophyllum | Avens, Large Leaf | Rosaceae | Rose Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings | May-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Geum rossii var. turbinatum | Avens, Alpine | Rosaceae | Rose Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Oct | Basal, Alternate | Compound | Uneven | Long | ||
| Geum triflorum | Prairie Smoke; Old-Man's-Whiskers | Rosaceae | Rose Family | Herb | Red | Montane, Subalpine | Openings | May-Aug | Basal, Opposite | Compound | Uneven | Long | ||
| 
Gilia aggregata See: Ipomopsis aggregata  | 
Gilia, Scarlet | |||||||||||||
| 
Gilia clokeyi See: Gilia ophthalmoides  | 
Gilia, Eyed | |||||||||||||
| 
Gilia congesta. See: Ipomopsis congesta ssp. matthewii  | 
Skyrocket, Ball-head | |||||||||||||
| 
Gilia formosa See: Aliciella formosa  | 
Gilia, Beautiful | |||||||||||||
| 
Gilia gunnisonii See: Ipomopsis gunnisonii  | 
Skyrocket, Gunnison's | |||||||||||||
| 
Gilia haydenii See: Aliciella haydenii ssp. crandallii  | 
Gilia, Crandall's | |||||||||||||
| 
Gilia haydenii See: Aliciella haydenii ssp. haydenii  | 
Gilia, Hayden's | |||||||||||||
| 
Gilia inconspicua See: Gilia ophthalmoides  | 
Gilia, Eyed | |||||||||||||
| 
Gilia longiflora See: Ipomopsis longiflora  | 
Skyrocket, Long-flowered | |||||||||||||
| Gilia ophthalmoides | Gilia, Eyed | Polemoniaceae | Phlox Family | Herb | White, Blue, Red | Semi-Desert, Foothills | Shrublands, Openings, Woodlands | Apr-Jul | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| 
Gilia ophthalmoides subspecies clokeyi See: Gilia ophthalmoides  | 
Gilia, Eyed | |||||||||||||
| 
Gilia pinnatifida See: Aliciella pinnatifida  | 
Gilia, Sticky | |||||||||||||
| 
Gilia polycladon See: Ipomopsis polycladon  | 
Skyrocket, Spreading | |||||||||||||
| 
Gilia pumila See: Ipomopsis pumila  | 
Skyrocket, Dwarf | |||||||||||||
| 
Gilia roseata See: Ipomopsis roseata  | 
Skyrocket, Rosy | |||||||||||||
| 
Gilia sinistra See: Navarretia sinistra  | 
Gilia, Alva Day's | |||||||||||||
| 
Gilia subnuda See: Aliciella subnuda  | 
Gilia, Carmine | |||||||||||||
| 
Gilia tenuituba See: Ipomopsis tenuituba  | 
Skyrocket, Slender-tube | |||||||||||||
| 
Glandularia bipinnatifida See: Glandularia wrightii  | 
Wright's Vervain | |||||||||||||
| Glandularia wrightii | Wright's Vervain | Verbenaceae | Verbena Family | Herb | Red | Semi-Desert, Foothills, Montane | Openings | Mar-Sep | Opposite | Simple, Compound | Uneven | Long | ||
| Glossopetalon spinescens var. meionandrum | Greasebush | Crossosomataceae | Crossosoma Family | Shrub | White | Semi-Desert | Rocky, Openings | Mar-May | Alternate, Opposite | Simple | Entire | Long | ||
| Glycyrrhiza lepidota | Licorice, Wild | Fabaceae (aka Leguminosae) | Pea Family | Herb | White | Foothills, Montane | Wetlands | May-Aug | Alternate | Compound | Uneven | Long | ||
| Goodyera oblongifolia | Orchid, Rattlesnake Plantain | Orchidaceae | Orchid Family | Herb | White, Yellow | Foothills, Montane, Subalpine | Woodlands | Jul-Sep | Basal | Simple | Entire | Long | ||
| Goodyera repens | Orchid, Dwarf Rattlesnake Plantain | Orchidaceae | Orchid Family | Herb | White | Foothills, Montane, Subalpine | Woodlands | Jul-Sep | Basal, Alternate | Simple | Entire | Long | ||
| Grayia brandegeei | Siltbush | Amaranthaceae | Amaranth Family | Shrub | Green, Yellow | Semi-Desert, Foothills | Openings, Shrublands | May-Jul | Alternate | Simple | Uneven, Entire | Long, Round | ||
| Grayia spinosa | Hopsage, Spiny | Amaranthaceae | Amaranth Family | Shrub | Green, Yellow | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Alternate | Simple | Entire | Long | ||
| 
Grindelia aphanactis See: Grindelia nuda  | 
Gumweed, Rayless | |||||||||||||
| Grindelia arizonica | Gumweed, Arizona | Asteraceae (aka Compositae) | Sunflower Family | Herb, Shrub | Yellow | Foothills, Montane | Openings, Disturbed, Shrublands, Woodlands | Jun-Oct | Both | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| 
Grindelia fastigiata See: Grindelia hirsutula  | 
Gumweed, Hairy | |||||||||||||
| Grindelia hirsutula | Gumweed, Hairy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Openings, Disturbed, Shrublands, Woodlands | Jun-Oct | Both | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| Grindelia nuda | Gumweed, Rayless | Asteraceae (aka Compositae) | Sunflower Family | Herb, Shrub | Yellow | Semi-Desert, Foothills | Openings, Disturbed, Shrublands, Woodlands | Jul-Sep | Disk | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| Grindelia squarrosa | Gumweed, Curly | Asteraceae (aka Compositae) | Sunflower Family | Herb, Shrub | Yellow | Foothills, Montane | Openings, Disturbed, Shrublands, Woodlands | Jun-Nov | Both | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| 
Grindelia squarrosa See: Grindelia nuda  | 
Gumweed, Rayless | |||||||||||||
| Gutierrezia elegans | Snakeweed, Lone Mesa | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Foothills | Openings | Jun-Sep | Both | Cluster | Alternate | Simple | Entire | Long | 
| Gutierrezia microcephala | Snakeweed, Small Head | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Openings, Disturbed | Jun-Oct | Both | Cluster | Alternate | Simple | Entire | Long | 
| Gutierrezia sarothrae | Snakeweed, Broom | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Openings, Disturbed | Jun-Oct | Both | Cluster | Alternate | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
H. discolor var. dumosus See: Holodiscus dumosus  | 
Mountain Spray; Spirea, Rock | |||||||||||||
| 
Habenaria huronensis See: Platanthera huronensis  | 
Orchid, Huron Bog | |||||||||||||
| 
Habenaria hyperborea See: Platanthera aquilonis  | 
Orchid, Northern Bog | |||||||||||||
| 
Habenaria hyperborea See: Platanthera huronensis  | 
Orchid, Huron Bog | |||||||||||||
| 
Habenaria viridis See: Dactylorhiza viridis  | 
Orchid, Long-bracted | |||||||||||||
| Hackelia floribunda | Stickseed, Many-flowered | Boraginaceae | Forget-Me-Not Family | Herb | Blue | Montane | Openings, Disturbed | Jun-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Halerpestus cymbalaria | Buttercup, Alkali; Buttercup, Marsh | Ranunculaceae | Buttercup Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Wetlands, Streamsides, Ponds, Openings | May-Aug | Basal | Simple | Entire, Uneven | Round, Long | ||
| 
Haplopappus lanceolatus See: Pyrrocoma uniflora var. uniflora  | 
Goldenweed, Plantain | |||||||||||||
| 
Haplopappus spinulosus See: Xanthisma spinulosum var. paradoxum  | 
Goldenweed, Woolly | |||||||||||||
| 
Haplopappus spinulosus See: Xanthisma spinulosum var. spinulosum  | 
Goldenweed, Woolly | |||||||||||||
| 
Haplopappus uniflorus See: Pyrrocoma uniflora var. uniflora  | 
Goldenweed, Plantain | |||||||||||||
| Hedeoma drummondii | Pennyroyal, Drummond's | Lamiaceae (aka Labiatae) | Mint Family | Herb | Blue, Red | Semi-Desert, Foothills | Rocky, Openings | May-Aug | Opposite | Simple | Entire | Long | ||
| Hedysarum boreale var. boreale | Chainpod, Northern; Sweetvetch, Utah | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | May-Aug | Alternate | Compound | Uneven | Long | ||
| Hedysarum occidentale var. occidentale | Chainpod, Western; Sweetvetch, Western | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, White | Montane, Subalpine | Openings, Shrublands, Woodlands | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| Helianthella microcephala | Sunflower, Small Head | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow, Blue | Foothills, Montane | Openings | Jun-Sep | Both, Disk | Single | Basal, Alternate, Opposite | Simple | Entire | Long | 
| Helianthella parryi | Sunflower, Parry's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane | Woodlands, Openings | Jun-Sep | Both | Single | Basal, Alternate, Opposite | Simple | Entire | Long | 
| Helianthella quinquenervis | Sunflower, Five-nerved; Sunflower, Little | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Woodlands, Streamsides | Jun-Sep | Both | Single | Basal, Alternate, Opposite | Simple | Entire | Long | 
| Helianthus annuus | Sunflower, Common | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Disturbed, Openings | May-Oct | Both | Single | Opposite, Alternate | Simple | Entire, Uneven | Long, Round | 
| Helianthus pauciflorus ssp. subrhomboideus | Sunflower, Stiff | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothill, Montane | Woodlands, Openings | Jun-Sep | Both | Single | Opposite | Simple | Entire | Long | 
| 
Helianthus rigidus See: Helianthus pauciflorus ssp. subrhomboideus  | 
Sunflower, Stiff | |||||||||||||
| Heliomeris multiflora var. multiflora | Goldeneye, Showy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Disturbed, Openings | May-Oct | Both | Single | Alternate, Opposite | Simple | Entire, Uneven | Long | 
| Heracleum maximum | Parsnip, Cow | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Montane, Subalpine | Woodlands, Openings, Streamsides | Jun-Aug | Alternate | Compound | Uneven | Round | ||
| 
Heracleum sphondylium See: Heracleum maximum  | 
Parsnip, Cow | |||||||||||||
| Herrickia glauca var. glauca | Aster, Waxy; Aster, Gray | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Foothills | Rocky, Woodlands, Openings | Jul-Sep | Both | Single | Alternate | Simple | Entire | Long | 
| 
Heterotheca pumila See: Heterotheca schneideri  | 
Aster, Schneider's Golden | |||||||||||||
| Heterotheca schneideri | Aster, Schneider's Golden | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Oct | Both | Mat | Alternate | Simple | Entire | Long | 
| Heterotheca villosa | Aster, Hairy Golden | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Disturbed | May-Nov | Both | Mat | Alternate | Simple | Entire | Long | 
| Heterotheca zionensis | Aster, Zion Golden | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Shrublands, Woodlands | Jun-Oct | Both | Mat | Alternate | Simple | Entire | Long | 
| Heuchera parvifolia | Alumroot, Littleleaf | Saxifragaceae | Saxifrage Family | Herb | Yellow, White | Montane, Subalpine, Alpine | Rocky, Woodlands, Shrublands, Openings | May-Aug | Basal | Simple | Uneven | Round | ||
| 
Hieracium aurantiacum See: Pilosella aurantiaca  | 
Orange Hawkweed | |||||||||||||
| Hieracium fendleri | Hawkweed, Fendler's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Woodlands | May-Aug | Ray | Single | Basal, Alternate | Simple | Entire | Long | 
| Hieracium triste | Hawkweed, Woolly | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine, Alpine | Woodlands, Openings, Shrublands | Jul-Sep | Ray | Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| 
Hippochaete hyemalis See: Equisetum praealtum  | 
Rush, Scouring | |||||||||||||
| Hippuris vulgaris | Mare's Tail | Plantaginaceae | Plantain Family | Herb | Green | Foothills, Montane | Streamsides, Ponds | May-Sep | Whorled | Simple | Entire | Long | ||
| 
Hirculus platysepalus See: Saxifraga flagellaris ssp. crandallii  | 
Saxifrage, Whiplash | |||||||||||||
| 
Hirculus serpyllifolius ssp. chrysanthus See: Saxifraga chrysantha  | 
Saxifrage, Golden | |||||||||||||
| 
Holodiscus discolor See: Holodiscus dumosus  | 
Mountain Spray; Spirea, Rock | |||||||||||||
| Holodiscus dumosus | Mountain Spray; Spirea, Rock | Rosaceae | Rose Family | Shrub | White, Red | Montane, Subalpine | Rocky, Woodlands, Shrublands, Openings | Jun-Sep | Alternate | Simple | Uneven | Round, Long | ||
| Hydrophyllum fendleri var. fendleri | Waterleaf, Fendler's | Hydrophyllaceae | Waterleaf Family | Herb | White | Foothills, Montane | Woodlands | May-Aug | Alternate | Compound | Uneven | Long | ||
| Hymenopappus filifolius | Sunflower, Threadleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Woodlands, Openings | May-Aug | Disk | Mat, Single | Basal, Alternate | Compound | Uneven | Long | 
| Hymenopappus newberryi | Cosmos, Wild | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Openings | Jun-Sep | Both | Mat, Single | Basal | Compound | Uneven | Long | 
| Hymenothrix dissecta | Bahia | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Disturbed, Openings | Jul-Oct | Both | Single | Alternate | Compound | Uneven | Long | 
| Hymenoxys grandiflora | Old Man of the Mountain | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Alpine | Rocky, Openings | Jun-Oct | Both | Single | Basal, Alternate | Compound | Uneven | Long | 
| Hymenoxys hoopesii | Sneezeweed, Orange | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow, Orange | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Oct | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Hymenoxys richardsonii | Rubberplant, Colorado | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Openings, Shrublands, Woodlands | May-Sep | Both | Single | Basal, Alternate | Simple, Compound | Entire | Long | 
| 
Hypericum formosum See: Hypericum scouleri  | 
St. Johnswort | |||||||||||||
| Hypericum scouleri | St. Johnswort | Hypericaceae | St. Johnswort Family | Herb | Yellow | Montane, Subalpine | Wetlands | Jun-Sep | Opposite | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Iliamna angulata | Hollyhock, Wild | Malvaceae | Mallow Family | Herb | White, Red | Foothills, Montane | Wetlands, Woodlands, Openings, Rocky | Jun-Aug | Alternate | Simple | Uneven | Round, Long | ||
| 
Iliamna grandiflora See: Iliamna angulata  | 
Hollyhock, Wild | |||||||||||||
| Ipomopsis aggregata | Gilia, Scarlet | Polemoniaceae | Phlox Family | Herb | Red | Semi-Desert, Foothills, Montane | Shrublands, Openings, Woodlands | May-Oct | Basal, Alternate | Compound | Uneven | Long | ||
| 
Ipomopsis aggregata variety macrosiphon See: Ipomopsis tenuituba  | 
Skyrocket, Slender-tube | |||||||||||||
| Ipomopsis congesta ssp. matthewii | Skyrocket, Ball-head | Polemoniaceae | Phlox Family | Herb | White | Semi-Desert, Montane | Openings | May-Sep | Basal, Alternate | Compound, Simple | Uneven | Long | ||
| Ipomopsis gunnisonii | Skyrocket, Gunnison's | Polemoniaceae | Phlox Family | Herb | White, Blue | Semi-Desert, Foothills | Openings, Shrublands, Woodlands | Apr-Oct | Basal, Alternate | Simple | Entire | Long | ||
| Ipomopsis longiflora | Skyrocket, Long-flowered | Polemoniaceae | Phlox Family | Herb | White, Blue | Semi-Desert | Openings, Shrublands | May-Sep | Alternate | Simple | Uneven | Long | ||
| Ipomopsis polyantha | Skyrocket, Pagosa | Polemoniaceae | Phlox Family | Herb | Blue, White | Foothills | Openings, Disturbed | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| Ipomopsis polycladon | Skyrocket, Spreading | Polemoniaceae | Phlox Family | Herb | White | Semi-Desert | Openings, Shrublands | Mar-Jun | Alternate | Simple | Uneven | Long | ||
| Ipomopsis pumila | Skyrocket, Dwarf | Polemoniaceae | Phlox Family | Herb | Blue, Red | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Alternate | Simple | Entire, Uneven | Long | ||
| Ipomopsis ramosa | Ipomopsis, Coral | Polemoniaceae | Phlox Family | Herb | Red, White, Orange | Montane | Openings, Woodlands | Jun-Oct | Alternate | Compound | Uneven | Long | ||
| Ipomopsis roseata | Skyrocket, Rosy | Polemoniaceae | Phlox Family | Herb | White | Semi-Desert | Openings, Rocky | May-Jul | Alternate | Compound, Simple | Uneven, Entire | Long | ||
| Ipomopsis tenuituba | Skyrocket, Slender-tube | Polemoniaceae | Phlox Family | Herb | Red, Blue, White | Montane, Subalpine | Openings, Woodlands | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| Iris missouriensis | Iris, Wild | Iridaceae | Iris Family | Herb | Blue, White | Foothills, Montane, Subalpine | Wetlands, Openings | May-Jul | Basal | Simple | Entire | Long | ||
| Isocoma pluriflora | Jimmyweed, Many-flowered; Goldenbush, Many-flowered | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert | Shrublands | Jul-Oct | Disk | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| Isocoma rusbyi | Jimmyweed, Rusby's; Goldenbush, Rusby's | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert | Shrublands, Woodlands, Disturbed | Jul-Sep | Disk | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| Ivesia gordonii var. gordonii | Ivesia | Rosaceae | Rose Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings, Rocky | May-Aug | Basal | Compound | Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Juniperus communis | Juniper, Common | Cupressaceae | Cypress Family | Shrub | Montane, Subalpine | Woodlands, Openings | Whorled | Simple | Entire | Long | ||||
| Juniperus deppeana | Juniper, Alligator | Cupressaceae | Cypress Family | Tree | Semi-Desert, Foothills | Woodlands | Opposite | Simple | Entire | Long | ||||
| Juniperus monosperma | Juniper, One-seed | Cupressaceae | Cypress Family | Tree | Semi-Desert | Shrublands, Woodlands | Opposite, Whorled | Simple | Entire | Long | ||||
| Juniperus osteosperma | Juniper, Utah | Cupressaceae | Cypress Family | Tree | Semi-Desert, Foothills | Woodlands | Opposite, Whorled | Simple | Entire | Long | ||||
| Juniperus scopulorum | Juniper, Rocky Mountain | Cupressaceae | Cypress Family | Tree | Foothills, Montane | Woodlands | Opposite, Whorled | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kallstroemia parviflora | Caltrop | Zygophyllaceae | Caltrop Family | Herb | Yellow | Semi-Desert, Foothills | Openings | Jul-Oct | Opposite | Compound | Uneven | Long | ||
| 
Kochia scoparia See: Bassia scoparia  | 
Kochia, Mexican Fireweed, Burning Bush, Summer Cypress | |||||||||||||
| Krascheninnikovia ceratoides ssp. lanata | Winterfat | Amaranthaceae | Amaranth Family | Shrub | White | Semi-Desert, Foothills, Montane | Openings, Shrublands | Jun-Aug | Alternate | Simple | Entire | Long | ||
| 
Krascheninnikovia lanata See: Krascheninnikovia ceratoides ssp. lanata  | 
Winterfat | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lactuca pulchella | Blue Lettuce | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Foothills, Montane | Woodlands, Openings, Disturbed | Jun-Sep | Ray | Single | Alternate | Simple | Even | Long | 
| Lactuca serriola | Prickly Lettuce | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Openings, Disturbed, Shrublands, Woodlands | Jul-Sep | Ray | Single, Cluster | Basal, Alternate | Simple | Uneven | Long | 
| 
Laennecia coulteri See: Laennecia schiedeana  | 
Woolwort, Pineland | |||||||||||||
| Laennecia schiedeana | Woolwort, Pineland | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow, White | Foothills, Montane | Openings, Disturbed, Woodlands | Jul-Sep | Both | Mat | Alternate | Simple | Entire, Uneven | Long | 
| 
Lappula marginata See: Lappula occidentalis  | 
Stickseed | |||||||||||||
| Lappula occidentalis | Stickseed | Boraginaceae | Forget-Me-Not Family | Herb | Blue, White | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | Mar-Jul | Alternate | Simple | Entire | Long | ||
| 
Lappula redowskii See: Lappula occidentalis  | 
Stickseed | |||||||||||||
| Lathyrus lanszwertii var. leucanthus | Sweetpea, Lanszwert's | Fabaceae (aka Leguminosae) | Pea Family | Herb | White | Montane, Subalpine | Woodlands | May-Aug | Opposite | Compound | Uneven | Long | ||
| 
Lathyrus leucanthus See: Lathyrus lanszwertii var. leucanthus  | 
Sweetpea, Lanszwert's | |||||||||||||
| Lathyrus pauciflorus | Sweetpea, Utah | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert, Foothills, Montane | Woodlands, Openings | Apr-Jul | Alternate | Compound | Uneven | Long | ||
| Lepidium chalepense | Pepperwort, Lens Pod | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White, Yellow | Foothills | Openings, Disturbed | Apr-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Lepidium draba | Whitetop | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Foothills | Openings, Disturbed | Apr-Jul | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Lepidium lasiocarpum var. lasiocarpum | Pepperwort, Hairy Pod | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert | Shrublands, Openings | Mar-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Lepidium latifolium | Pepperweed, Broad-leaf; Pepperwort, Broad-leaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert, Foothills | Disturbed, Woodlands, Shrublands, Openings | Jun-Oct | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Lepidium montanum | Peppergrass, Western; Pepperwort, Mountain | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert, Foothills, Montane | Disturbed, Openings | Apr-Nov | Basal, Alternate | Simple, Compound | Entire, Uneven | Long | ||
| 
Lepidotheca suaveolens See: Matricaria discoidea  | 
Pineapple Weed | |||||||||||||
| 
Leptodactylon pungens See: Linanthus pungens ssp. pungens  | 
Phlox, Prickly | |||||||||||||
| Leptosiphon nuttallii ssp. nuttallii | Phlox, Slender-tubed | Polemoniaceae | Phlox Family | Shrub, Herb | White | Foothills, Montane, Subalpine | Openings, Woodlands, Rocky | Jun-Sep | Opposite | Compound | Uneven | Long, Round | ||
| 
Lesquerella fendleri See: Physaria fendleri  | 
Bladderpod, Fendler's | |||||||||||||
| 
Lesquerella rectipes See: Physaria rectipes  | 
Bladderpod, Straight | |||||||||||||
| Leucanthemum vulgare | Daisy, Ox-eye | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane, Subalpine | Openings, Disturbed | Jun-Oct | Both | Single, Mat | Alternate, Basal | Simple | Entire, Uneven | Long | 
| Lewisia nevadensis | Bitterroot, Nevada | Montiaceae | Miner's Lettuce Family | Herb | White, Red | Montane | Openings, Wetlands, Woodlands | Apr-Jul | Basal | Simple | Entire | Long | ||
| Lewisia pygmaea | Bitterroot, Pygmy | Montiaceae | Miner's Lettuce Family | Herb | Red | Montane, Subalpine, Alpine | Woodlands, Openings, Rocky | May-Aug | Basal | Simple | Entire | Long | ||
| 
Lidia obtusiloba See: Cherleria obtusiloba  | 
Sandwort, Alpine; Stitchwort, Alpine | |||||||||||||
| 
Ligularia amplectens See: Senecio amplectens var. amplectens  | 
Ragwort, Showy | |||||||||||||
| 
Ligularia bigelovii See: Senecio bigelovii var. hallii  | 
Ragwort, Nodding | |||||||||||||
| 
Ligularia holmii See: Senecio amplectens var. holmii  | 
Ragwort, Holm's | |||||||||||||
| 
Ligularia soldanella See: Senecio soldanella  | 
Ragwort, Colorado | |||||||||||||
| Ligusticum porteri | Loveroot; Lovage, Porter's; Osha | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Foothills, Montane, Subalpine, Alpine | Woodlands, Openings | Jun-Sep | Basal, Alternate | Compound | Uneven | Round, Long | ||
| 
Ligusticum scopulorum See: Conioselinum scopulorum  | 
Parsley, Hemlock; Lovage, Rock; Hemlock, Parsely | |||||||||||||
| Lilium philadelphicum var. andinum | Lily, Wood | Liliaceae | Lily Family | Herb | Orange | Montane | Wetlands | Jun-Aug | Whorled, Alternate | Simple | Entire | Long | ||
| 
Limnorchis aquilonis See: Platanthera aquilonis  | 
Orchid, Northern Bog | |||||||||||||
| 
Limnorchis huronensis See: Platanthera huronensis  | 
Orchid, Huron Bog | |||||||||||||
| 
Linanthastrum nuttallii See: Leptosiphon nuttallii ssp. nuttallii  | 
Phlox, Slender-tubed | |||||||||||||
| 
Linanthus nuttallii See: Leptosiphon nuttallii ssp. nuttallii  | 
Phlox, Slender-tubed | |||||||||||||
| Linanthus pungens ssp. pungens | Phlox, Prickly | Polemoniaceae | Phlox Family | Herb | White | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | May-Aug | Alternate, Opposite | Compound | Uneven | Long | ||
| Linaria dalmatica | Butter and Eggs; Toadflax, Dalmatian | Plantaginaceae | Plantain Family | Herb | Yellow, Orange | Foothills, Montane | Disturbed, Openings | May-Sep | Alternate, Opposite, Whorled | Simple | Entire | Long | ||
| 
Linaria genistifolia See: Linaria dalmatica  | 
Butter and Eggs; Toadflax, Dalmatian | |||||||||||||
| Linaria vulgaris | Butter and Eggs, Common; Toadflax | Plantaginaceae | Plantain Family | Herb | Yellow, Orange | Foothills, Montane, Subalpine | Disturbed, Openings | May-Sep | Alternate, Opposite, Whorled | Simple | Entire | Long | ||
| Linnaea borealis ssp. americana | Twinflower, Linnaeus' | Caprifoliaceae | Honeysuckle Family | Herb, Vine | Red, White | Montane, Subalpine | Woodlands | Jun-Sep | Opposite | Simple | Entire, Uneven | Round | ||
| Linum aristatum | Flax, Yellow Bristle | Linaceae | Flax Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Oct | Alternate | Simple | Entire | Long | ||
| Linum lewisii var. lewisii | Flax, Blue | Linaceae | Flax Family | Herb | Blue | Semi-Desert, Foothills, Montane, Subalpine | Woodlands, Openings | Apr-Aug | Alternate | Simple | Entire | Long | ||
| Linum puberulum | Flax, Yellow Hairy; Flax, Plains | Linaceae | Flax Family | Herb | Yellow, Orange | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Apr-Oct | Alternate | Simple | Entire | Long | ||
| Linum subteres | Flax, Utah Yellow | Linaceae | Flax Family | Herb | Yellow | Semi-Desert, Foothills | Openings | May-Sep | Alternate | Simple | Entire | Long | ||
| 
Listera cordata See: Neottia cordata  | 
Twayblade, Heartleaf | |||||||||||||
| Lithophragma glabrum | Woodland Star, Bulbous; Woodland Star, Smooth | Saxifragaceae | Saxifrage Family | Herb | White, Red | Foothills, Montane | Woodlands, Openings | May-Jul | Basal, Alternate | Simple | Uneven | Round | ||
| Lithophragma parviflorum var. parviflorum | Woodland Star, Smallflower | Saxifragaceae | Saxifrage Family | Herb | White, Red | Foothills, Montane | Woodlands, Openings | May-Jul | Basal, Alternate | Simple | Uneven | Round | ||
| Lithophragma tenellum | Woodland Star, Slender; Woodland Star, Delicate | Saxifragaceae | Saxifrage Family | Herb | White, Red | Foothills, Montane | Woodlands, Openings | May-Jul | Basal, Alternate | Simple | Uneven | Round | ||
| Lithospermum incisum | Gromwell, Fringed; Stoneseed, Plains; Puccoon, Fringed | Boraginaceae | Forget-Me-Not Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands, Woodlands | Mar-Jul | Alternate | Simple | Entire | Long | ||
| Lithospermum multiflorum | Puccoon, Many-flowered; Gromwell, Purple; Stoneseed, Pretty | Boraginaceae | Forget-Me-Not Family | Herb | Yellow | Montane, Subalpine | Woodlands, Openings | Jun-Aug | Alternate | Simple | Entire | Long | ||
| Lithospermum ruderale | Puccoon, Field; Stoneseed, Western | Boraginaceae | Forget-Me-Not Family | Herb | Yellow | Foothills, Montane | Woodlands | Apr-Jul | Alternate | Simple | Entire | Long | ||
| Lloydia serotina | Lily, Alp | Liliaceae | Lily Family | Herb | White | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Simple | Entire | Long | ||
| 
Lomatium dissectum See: Lomatium multifidum  | 
Lomatium, Fernleaf | |||||||||||||
| Lomatium grayi | Biscuitroot, Gray's; Lomatium, Milfoil | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Foothills, Montane | Shrublands, Woodlands, Openings | Mar-Jun | Basal, Opposite | Compound | Uneven | Long | ||
| Lomatium latilobum | Biscuitroot, Canyonlands; Lomatium, Canyonlands | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert | Shrublands | Mar-Jun | Basal | Compound | Uneven | Long | ||
| Lomatium linearifolium | Turkeypea; Potato, Indian; Snowdrops | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Foothills, Montane | Openings, Shrublands, Woodlands | Mar-Jun | Basal | Compound | Uneven | Long | ||
| Lomatium minimum | Lomatium, Little | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Montane | Openings | May-Jul | Basal | Compound | Uneven | Long | ||
| Lomatium multifidum | Lomatium, Fernleaf | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Apr-Jun | Basal, Opposite | Compound | Uneven | Round | ||
| Lomatium parryi | Biscuitroot, Parry's; Lomatium, Parry's | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands | Mar-Jun | Basal | Compound | Uneven | Long | ||
| Lomatium triternatum | Biscuitroot, Nine-leaf; Parsley, Nine-leaf Desert | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Foothills | Openings, Woodlands | Apr-Jul | Basal | Compound | Uneven | Round | ||
| Lonicera involucrata | Twinberry | Caprifoliaceae | Honeysuckle Family | Shrub, Herb | Yellow | Montane, Subalpine | Woodlands | May-Aug | Opposite | Simple | Entire | Long | ||
| 
Lotus wrightii See: Acmispon wrightii  | 
Vetch, Deer; Trefoil, Wright's | |||||||||||||
| Lupinus ammophilus | Sand-loving Lupine | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Foothills, Montane | Openings, Woodlands | May-Aug | Alternate | Compound | Uneven | Round | ||
| 
Lupinus ammophilus See: Lupinus prunophilus  | 
Lupine, Chokecherry | |||||||||||||
| Lupinus argenteus | Lupine, Silver | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Foothills, Montane, Subalpine | Openings | Apr-Aug | Alternate | Compound | Uneven | Round | ||
| Lupinus brevicaulis | Lupine, Short-stem | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Semi-Desert, Foothills | Openings | May-Jul | Basal | Compound | Uneven | Round | ||
| Lupinus caespitosus | Lupine, Matted | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Foothills, Montane | Openings | May-Aug | Basal | Compound | Uneven | Round | ||
| Lupinus kingii var. kingii | Lupine, King's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Foothills, Montane | Openings, Woodlands | May-Aug | Alternate | Compound | Uneven | Round | ||
| 
Lupinus lepidus See: Lupinus caespitosus  | 
Lupine, Matted | |||||||||||||
| 
Lupinus polyphyllus var. ammophilus See: Lupinus prunophilus  | 
Lupine, Chokecherry | |||||||||||||
| 
Lupinus polyphyllus var. prunophilus See: Lupinus prunophilus  | 
Lupine, Chokecherry | |||||||||||||
| Lupinus prunophilus | Lupine, Chokecherry | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Foothills, Montane | Openings, Woodlands | May-Aug | Alternate | Compound | Uneven | Round | ||
| Lupinus pusillus | Lupine, Dwarf; Lupine, Rusty | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Semi-Desert | Openings, Shrublands, Woodlands | Apr-Jul | Alternate | Compound | Uneven | Round | ||
| 
Lychinus drummondii See: Silene drummondii  | 
Catchfly, Drummond's | |||||||||||||
| Lycium pallidum var. pallidum | Wolfberry, Pale | Solanaceae | Nightshade Family | Shrub | Yellow, Green, White | Semi-Desert | Shrublands, Openings | Mar-Jun | Alternate | Simple | Entire, Uneven | Long | ||
| Lygodesmia arizonica | Rushpink, Arizona; Skeltonplant, Arizona | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White, Blue | Semi-Desert, Foothills | Openings | May-Jul | Ray | Single | Basal, Alternate | Simple | Entire | Long | 
| Lygodesmia doloresensis | Skeletonplant, Dolores River; Rushpink, Dolores River | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White, Blue | Semi-Desert | Openings, Shrublands | May-Jun | Ray | Single | Alternate | Simple | Entire, Uneven | Long | 
| Lygodesmia entrada | Rushpink, Entrada; Skeletonplant, Entrada | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White, Blue | Semi-Desert | Openings | May-Jun | Ray | Single | Basal, Alternate | Simple | Entire | Long | 
| Lygodesmia grandiflora | Rushpink, Large-flowered; Skeletonplant, Large-flowered | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White, Blue | Semi-Desert, Foothills | Openings | May-Jul | Ray | Single | Basal, Alternate | Simple | Entire | Long | 
| Lygodesmia juncea | Rushpink, Rush-like; Skeletonplant, Rush | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White, Blue | Semi-Desert, Foothills, Montane | Openings, Woodlands, Shrublands | May-Sep | Ray | Single | Alternate | Simple | Entire | Long | 
| 
Lysiella obtusata See: Platanthera obtusata  | 
Orchid, Blunt-leaf | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
Machaeranthera bigelovii See: Dieteria bigelovii var. bigelovii  | 
Aster, Bigelow's Tansy | |||||||||||||
| 
Machaeranthera canescens See: Dieteria canescens  | 
Aster, Gray Tansy | |||||||||||||
| 
Machaeranthera coloradoensis See: Xanthisma coloradoense  | 
Aster, Colorado Tansy | |||||||||||||
| 
Machaeranthera grindelioides See: Xanthisma grindelioides var. grindelioides  | 
Goldenweed, Saw-toothed | |||||||||||||
| 
Machaeranthera pinnatifida See: Xanthisma spinulosum var. spinulosum  | 
Goldenweed, Woolly | |||||||||||||
| 
Machaeranthera pinnatifida variety pinnatifida See: Xanthisma spinulosum var. paradoxum  | 
Goldenweed, Woolly | |||||||||||||
| Madia glomerata | Tarplant | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Disturbed | May-Sep | Both | Single | Alternate, Opposite | Simple | Entire | Long | 
| 
Mahonia fendleri See: Berberis fendleri  | 
Barberry, Fendler's | |||||||||||||
| 
Mahonia fremontii See: Alloberberis fremontii  | 
Barberry, Fremont's | |||||||||||||
| Mahonia repens | Oregon Grape | Berberidaceae | Barberry Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | Apr-Aug | Alternate | Simple | Uneven | Long | ||
| Maianthemum | Lily | Liliaceae (See Asparagaceae) | Asparagus Family | Long | ||||||||||
| Maianthemum | Lily | Ruscaceae (See Asparagaceae) | Asparagus Family | Long | ||||||||||
| 
Maianthemum  racemosum ssp. amplexicaule See: Maianthemum amplexicaule  | 
Solomon's Plume | |||||||||||||
| Maianthemum amplexicaule | Solomon's Plume | Asparagaceae | Asparagus Family | Herb | White | Foothills, Montane, Subalpine | Woodlands | May-Aug | Alternate | Simple | Entire | Long | ||
| Maianthemum stellatum | Lily, Star | Asparagaceae | Asparagus Family | Herb | White | Foothills, Montane, Subalpine | Woodlands | May-Aug | Alternate | Simple | Entire | Long | ||
| 
Mainanthemum racemosum See: Maianthemum amplexicaule  | 
Solomon's Plume | |||||||||||||
| Malacothrix sonchoides | Dandelion, Sowthistle Desert | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Openings | May-Jul | Ray | Single | Basal, Alternate | Simple | Uneven | Long | 
| 
Malcomia africana See: Strigosella africana  | 
Mustard, African | |||||||||||||
| Malva neglecta | Cheeseweed; Mallow, Cheese | Malvaceae | Mallow Family | Vine, Herb | Red, White | Foothills | Disturbed | Apr-Oct | Alternate | Simple | Uneven | Round | ||
| Marrubium vulgare | Horehound | Lamiaceae (aka Labiatae) | Mint Family | Herb | White | Foothills | Disturbed | May-Oct | Opposite | Simple | Uneven | Long, Round | ||
| Matricaria discoidea | Pineapple Weed | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings, Disturbed | May-Sep | Disk | Single | Alternate | Compound | Uneven | Long | 
| 
Matricaria matricarioides See: Matricaria discoidea  | 
Pineapple Weed | |||||||||||||
| Medicago lupulina | Black Medic | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Disturbed, Woodlands | May-Oct | Alternate | Compound | Uneven | Round, Long | ||
| Medicago sativa | Alfalfa | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue, Yellow, White | Semi-Desert, Foothills, Montane | Openings, Disturbed | May-Oct | Alternate | Compound | Uneven | Round, Long | ||
| 
Melilotus alba See: Melilotus officinalis  | 
Clover, Sweet | |||||||||||||
| 
Melilotus lutea See: Melilotus officinalis  | 
Clover, Sweet | |||||||||||||
| Melilotus officinalis | Clover, Sweet | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow, White | Semi-Desert, Foothills, Montane | Disturbed, Openings | May-Oct | Alternate | Compound | Uneven | Round, Long | ||
| Mentha arvensis | Mint, Field | Lamiaceae (aka Labiatae) | Mint Family | Herb | Blue, Red | Montane | Wetlands | Jun-Sep | Opposite | Simple | Uneven | Long | ||
| Mentzelia albicaulis | Blazingstar, Whitestem; Stickleaf, Whitestem | Loasaceae | Loasa Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Mar-Jul | Alternate | Simple | Uneven | Long | ||
| Mentzelia multiflora | Blazingstar, Desert; Blazingstar, Adonis; Stickleaf, Adonis | Loasaceae | Loasa Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Nov | Alternate | Simple | Uneven | Long | ||
| Mentzelia pterosperma | Blazingstar, Wingseed; Stickleaf, Wingseed | Loasaceae | Loasa Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Nov | Alternate | Simple | Uneven | Long | ||
| Mentzelia rusbyi | Blazingstar, Rusby's; Stickleaf, Rusby's | Loasaceae | Loasa Family | Herb | Yellow | Semi-Desert, Foothills | Openings | Jun-Aug | Alternate | Simple | Uneven | Long | ||
| Menyanthes trifoliata | Buckbean | Menyanthaceae | Buckbean Family | Herb | White | Montane, Subalpine | Ponds | May-Aug | Basal | Compound | Uneven | Round | ||
| 
Mertensia brevistyla See: Mertensia fusiformis  | 
Bluebells, Spindle-rooted | |||||||||||||
| Mertensia ciliata var. ciliata | Bluebells, Fringed; Bluebells, Mountain | Boraginaceae | Forget-Me-Not Family | Herb | Blue | Montane, Subalpine | Streamsides | May-Aug | Alternate | Simple | Entire | Long | ||
| Mertensia franciscana | Bluebells, Franciscan; Bluebells, Flagstaff | Boraginaceae | Forget-Me-Not Family | Herb | Blue | Montane, Subalpine | Openings, Streamsides | May-Sep | Alternate | Simple | Entire | Long | ||
| Mertensia fusiformis | Bluebells, Spindle-rooted | Boraginaceae | Forget-Me-Not Family | Herb | Blue | Foothills, Montane | Woodlands, Openings | Apr-Jul | Basal, Alternate | Simple | Entire | Long | ||
| Mertensia lanceolata | Bluebells, Lance-leaf | Boraginaceae | Forget-Me-Not Family | Herb | Blue | Foothills, Montane, Subalpine, Alpine | Woodlands, Openings | May-Sep | Alternate | Simple | Entire | Long | ||
| 
Mertensia oblongifolia See: Mertensia fusiformis  | 
Bluebells, Spindle-rooted | |||||||||||||
| 
Mesynium aristatum See: Linum aristatum  | 
Flax, Yellow Bristle | |||||||||||||
| 
Mesynium puberulum See: Linum puberulum  | 
Flax, Yellow Hairy; Flax, Plains | |||||||||||||
| Micranthes odontoloma | Saxifrage, Brook | Saxifragaceae | Saxifrage Family | Herb | White | Montane, Subalpine, Alpine | Streamsides | Jun-Sep | Basal | Simple | Uneven | Round | ||
| Micranthes oregana | Saxifrage, Oregon Snowball | Saxifragaceae | Saxifrage Family | Herb | White | Montane, Subalpine, Alpine | Wetlands, Rocky, Openings | May-Aug | Basal | Simple | Uneven | Long | ||
| Micranthes rhomboidea | Saxifrage, Snowball; Saxifrage, Diamondleaf | Saxifragaceae | Saxifrage Family | Herb | White | Montane, Subalpine, Alpine | Rocky, Openings | May-Sep | Basal | Simple | Uneven | Round | ||
| Microsteris gracilis | Phlox, Slender | Polemoniaceae | Phlox Family | Herb | White, Blue | Foothills, Montane | Openings, Shrublands, Woodlands | Mar-Jul | Opposite, Alternate | Simple | Entire | Long | ||
| 
Mimulus eastwoodiae See: Erythranthe eastwoodiae  | 
Monkeyflower, Eastwood's | |||||||||||||
| 
Mimulus guttatus See: Erythranthe guttata  | 
Monkeyflower, Yellow | |||||||||||||
| 
Mimulus rubellus See: Erythranthe rubella  | 
Monkey Flower, Red Stem | |||||||||||||
| 
Mimulus suksdorfii See: Erythranthe suksdorfii  | 
Monkey Flower, Suksdorf's | |||||||||||||
| 
Mimulus tilingii See: Erythranthe tilingii  | 
Monkey Flower, Tiling's; Monkeyflower, Subalpine | |||||||||||||
| 
Minuartia macrantha See: Sabulina macrantha  | 
Sandwort, Large-flower | |||||||||||||
| 
Minuartia obtusiloba See: Cherleria obtusiloba  | 
Sandwort, Alpine; Stitchwort, Alpine | |||||||||||||
| 
Minuartia rubella See: Sabulina rubella  | 
Sandwort, Red | |||||||||||||
| Mirabilis linearis var. linearis | Four O'Clocks, Narrow-leaf | Nyctaginaceae | Four O'Clock Family | Herb | Red, White | Semi-Desert, Foothills, Montane | Woodlands, Openings, Disturbed | May-Sep | Opposite | Simple | Entire | Long | ||
| Mirabilis multiflora | Four O'Clocks, Showy | Nyctaginaceae | Four O'Clock Family | Herb | Red | Semi-Desert, Foothills | Disturbed, Openings, Woodlands, Shrublands | Apr-Oct | Opposite | Simple | Entire | Long | ||
| Mirabilis oxybaphoides | Four O'Clocks, Spreading | Nyctaginaceae | Four O'Clock Family | Herb | Red, White | Semi-Desert, Foothills | Woodlands, Disturbed, Openings | May-Aug | Opposite | Simple | Entire | Long | ||
| 
Mitella pentandra See: Pectiantia pentandra  | 
Mitrewort, Green; Bishop's Cap, Green | |||||||||||||
| 
Mitella stauropetala See: Ozomelis stauropetala  | 
Mitrewort, White; Bishop's Cap, White | |||||||||||||
| Moehringia macrophylla | Sandwort, Bigleaf | Caryophyllaceae | Pink Family | Herb | White | Montane, Subalpine | Wetlands, Openings, Woodlands | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Monardella odoratissima ssp. glauca | Monarda, Aromatic; Horsemint; Beebalm; Pennyroyal | Lamiaceae (aka Labiatae) | Mint Family | Herb | Red | Montane, Subalpine | Openings, Rocky | Jun-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| Moneses uniflora | Single Delight; Wood Nymph | Ericaceae | Heath Family | Herb | White | Montane, Subalpine | Woodlands | Jun-Aug | Basal, Opposite | Simple | Uneven | Round | ||
| 
Monolepis nuttalliana See: Blitum nuttallianum  | 
Poverty Weed, Nuttall's | |||||||||||||
| 
Mugedium pulchellum See: Lactuca pulchella  | 
Blue Lettuce | |||||||||||||
| Myriopteris gracilis | Fern, Slender Lip | Pteridaceae | Maidenhair Fern Family | Fern | Foothills, Montane | Rocky, Openings | Basal | Compound | Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nama retrorsa | Nama, Howell's; Fiddleleaf, Betatakin | Namaceae | Fiddleleaf Family | Herb | Red | Semi-Desert | Openings, Shrublands | Apr-Aug | Alternate, Opposite | Simple | Entire | Long | ||
| Nasturtium officinale | Cress, Water | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert, Foothills, Montane | Wetlands, Streamsides | May-Jul | Alternate | Compound | Uneven | Long | ||
| Navarretia breweri | Pincushion, Yellow | Polemoniaceae | Phlox Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | Apr-Aug | Alternate | Compound | Uneven | Long | ||
| Navarretia sinistra | Gilia, Alva Day's | Polemoniaceae | Phlox Family | Herb | White, Blue | Semi-Desert, Foothills | Shrublands, Openings, Woodlands | Apr-Aug | Alternate | Compound | Uneven | Long | ||
| 
Negundo aceroides See: Acer negundo  | 
Box Elder | |||||||||||||
| Neokochia americana | Green Molly | Amaranthaceae | Amaranth Family | Herb | Green, Yellow, White | Semi-Desert | Shrublands, Openings | May-Sep | Alternate | Simple | Entire | Long | ||
| Neottia cordata | Twayblade, Heartleaf | Orchidaceae | Orchid Family | Herb | Green | Montane, Subalpine | Wetlands, Streamsides | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Nicotiana attenuata | Tobacco, Coyote | Solanaceae | Nightshade Family | Herb | White | Semi-Desert, Foothills | Openings, Woodlands | May-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Noccaea fendleri ssp. glauca | Candytuft, Wild; Pennycress | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Foothills, Montane, Subalpine, Alpine | Woodlands, Openings | Apr-Aug | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| 
Noccaea montana See: Noccaea fendleri ssp. glauca  | 
Candytuft, Wild; Pennycress | |||||||||||||
| 
Nuphar lutea subspecies polysepala See: Nuphar polysepala  | 
Lily, Water; Spatterdock | |||||||||||||
| Nuphar polysepala | Lily, Water; Spatterdock | Nymphaeaceae | Water-Lily Family | Herb | Yellow | Montane, Subalpine | Ponds | Jun-Sep | Basal | Simple | Entire | Round | ||
| 
Nuttallia pterosperma See: Mentzelia pterosperma  | 
Blazingstar, Wingseed; Stickleaf, Wingseed | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oenothera albicaulis | Primrose, White-stemmed Evening | Onagraceae | Evening Primrose Family | Herb | White | Semi-Desert, Foothills, Montane | Openings | Mar-Jul | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Oenothera caespitosa ssp. marginata | Primrose, Tufted Evening | Onagraceae | Evening Primrose Family | Herb | White | Semi-Desert, Foothills, Montane | Disturbed, Openings | Apr-Jul | Basal | Simple | Entire, Uneven | Long | ||
| Oenothera caespitosa ssp. navajoensis | Primrose, Navajo Evening | Onagraceae | Evening Primrose Family | Herb | White | Semi-Desert | Openings | Apr-Jun | Basal | Simple | Entire, Uneven | Long | ||
| Oenothera coronopifolia | Primrose, Cutleaf Evening | Onagraceae | Evening Primrose Family | Herb | White | Foothills, Montane | Woodlands, Openings | May-Aug | Alternate | Simple, Compound | Uneven | Long | ||
| Oenothera curtiflora | Velvetweed | Onagraceae | Evening Primrose Family | Herb | White, Red | Semi-Desert, Foothills | Wetlands, Disturbed, Openings | May-Oct | Alternate | Simple | Entire, Uneven | Long | ||
| 
Oenothera curtifolia See: Oenothera curtiflora  | 
Velvetweed | |||||||||||||
| Oenothera elata ssp. hirsutissima | Primrose, Hooker's Evening | Onagraceae | Evening Primrose Family | Herb | Yellow | Foothills, Montane | Wetlands, Openings, Disturbed | May-Sep | Basal, Alternate | Simple | Uneven | Long | ||
| Oenothera flava | Primrose, Yellow Evening | Onagraceae | Evening Primrose Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings | May-Aug | Basal | Simple | Uneven | Long | ||
| Oenothera lavandulifolia | Sundrops | Onagraceae | Evening Primrose Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Shrublands, Openings | Apr-Oct | Alternate | Simple | Entire | Long | ||
| Oenothera longissima | Primrose, Bridges Evening | Onagraceae | Evening Primrose Family | Herb | Yellow | Semi-Desert | Rocky, Streamsides, Openings | May-Sep | Basal, Alternate | Simple | Uneven | Long | ||
| Oenothera pallida | Primrose, Pale Evening | Onagraceae | Evening Primrose Family | Herb | White | Semi-Desert, Foothills | Shrublands, Openings | Apr-Sep | Alternate | Simple | Uneven | Long | ||
| 
Oligosporus dracunculus See: Artemisia dracunculus  | 
Tarragon, Wild | |||||||||||||
| Onobrychis viciifolia | Sainfoin | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Foothills, Montane | Disturbed | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| Opuntia fragilis | Cactus, Fragile Prickly Pear | Cactaceae | Cactus Family | Cactus, Herb | Yellow, Green | Semi-Desert, Foothills | Openings, Woodlands | May-Aug | Modified To Spines | N/A | N/A | N/A | ||
| 
Opuntia imbricata See: Cylindropuntia imbricata  | 
Cholla, Cane; Cholla, Tree | |||||||||||||
| Opuntia phaeacantha | Cactus, Brown-spined Prickly Pear | Cactaceae | Cactus Family | Cactus, Herb | Yellow, Red | Semi-Desert, Foothills | Openings | May-Jul | Modified To Spines | N/A | N/A | N/A | ||
| Opuntia polyacantha | Cactus, Many-spined Prickly Pear; Cactus, Plains Prickly Pear | Cactaceae | Cactus Family | Cactus, Herb | Yellow, Red | Semi-Desert, Foothills, Montane | Openings | May-Jul | Modified To Spines | N/A | N/A | N/A | ||
| 
Opuntia whipplei See: Cylindropuntia whipplei var. whipplei  | 
Cholla, Whipple's | |||||||||||||
| 
Oreobroma nevadensis See: Lewisia nevadensis  | 
Bitterroot, Nevada | |||||||||||||
| 
Oreobroma pygmaea See: Lewisia pygmaea  | 
Bitterroot, Pygmy | |||||||||||||
| Oreocarya flava | Cryptantha, Yellow | Boraginaceae | Forget-Me-Not Family | Herb | Yellow | Semi-Desert, Foothills | Openings | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Oreocarya flavoculata | Cat's Eye, Little Yellow | Boraginaceae | Forget-Me-Not Family | Herb | White, Yellow | Semi-Desert, Foothills | Openings | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Oreocarya fulvocanescens | Cat's Eye, Gray | Boraginaceae | Forget-Me-Not Family | Herb | Yellow, White | Semi-Desert, Foothills | Openings | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Oreocarya humilis | Cat's Eye, Humble | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Openings | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Oreocarya paradoxa | Cat's Eye, Paradox | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Openings | Apr-Jun | Basal | Simple | Entire | Long | ||
| Oreocarya revealii | Cat's Eye, Reveal's | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Openings | May-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Oreocarya suffruticosa | Cat's Eye, Shrubby | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Openings | May-Jun | Alternate | Simple | Entire | Long | ||
| Oreocarya tenuis | Cat's Eye, Slender | Boraginaceae | Forget-Me-Not Family | Herb | White | Semi-Desert | Openings | May-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Oreochrysum parryi | Goldenweed, Parry's; Goldenrod, Parry's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine, Alpine | Woodlands | Jun-Oct | Both | Mat | Alternate | Simple | Entire | Long | 
| Oreoxis alpina ssp. alpina | Parsley, Alpine | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Montane, Subalpine, Alpine | Rocky, Openings | May-Aug | Basal | Compound | Uneven | Long, Round | ||
| Oreoxis bakeri | Parsley, Baker's Alpine | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Alpine | Rocky, Openings | Jun-Sep | Basal | Compound | Uneven | Long | ||
| 
Orobanche arizonica See: Aphyllon arizonicum  | 
Broomrape, Arizona | |||||||||||||
| 
Orobanche cooperi See: Aphyllon arizonicum  | 
Broomrape, Arizona | |||||||||||||
| 
Orobanche fasciculata See: Aphyllon fasciculatum  | 
Broomrape, Bundled | |||||||||||||
| 
Orobanche uniflora See: Aphyllon uniflorum  | 
Broomrape, Single-flower | |||||||||||||
| 
Orogenia linearifolia See: Lomatium linearifolium  | 
Turkeypea; Potato, Indian; Snowdrops | |||||||||||||
| 
Orthilia obtustata See: Orthilia secunda  | 
Wintergreen, One-sided; Sidebells | |||||||||||||
| Orthilia secunda | Wintergreen, One-sided; Sidebells | Ericaceae | Heath Family | Herb | White | Montane, Subalpine | Woodlands | Jun-Aug | Basal, Alternate, Whorled | Simple | Uneven, Entire | Round | ||
| Orthocarpus luteus | Owl-Clover, Yellow | Orobanchaceae | Broomrape Family | Herb | Yellow | Foothills, Montane | Woodlands, Shrublands, Openings | Jun-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Orthocarpus purpureoalbus | Owl-Clover, Purple | Orobanchaceae | Broomrape Family | Herb | White, Blue, Red | Foothills, Montane | Woodlands, Shrublands, Openings | Jun-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Osmorhiza berteroi | Sweet Cicely, Mountain | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Foothills, Montane | Woodlands | May-Aug | Alternate | Compound | Uneven | Long, Round | ||
| 
Osmorhiza chilensis See: Osmorhiza berteroi  | 
Sweet Cicely, Mountain | |||||||||||||
| 
Osmorhiza chilensis See: Osmorhiza depauperata  | 
Sweet Cicely, Dwarf | |||||||||||||
| Osmorhiza depauperata | Sweet Cicely, Dwarf | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Foothills, Montane | Woodlands | May-Aug | Alternate | Compound | Uneven | Long, Round | ||
| Osmorhiza occidentalis | Sweet Cicely, Western | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | Jun-Aug | Alternate | Compound | Uneven | Long, Round | ||
| Ostrya knowltonii | Hophornbeam, Western | Betulaceae | Birch Family | Tree | Red, Brown | Semi-Desert | Openings, Rocky | May-Jun | Alternate | Simple | Uneven | Long | ||
| 
Oxalis alpina See: Oxalis metcalfei  | 
Sorrel, Metcalf's Wood | |||||||||||||
| Oxalis dillenii | Sorrel, Yellow Wood | Oxalidaceae | Wood Sorrel Family | Herb | Yellow | Foothills, Montane | Openings | May-Oct | Alternate, Whorled | Compound | Uneven | Long, Round | ||
| Oxalis metcalfei | Sorrel, Metcalf's Wood | Oxalidaceae | Wood Sorrel Family | Herb | Blue | Montane | Openings | Mar-Aug | Basal | Compound | Uneven | Long, Round | ||
| 
Oxalis violacea See: Oxalis metcalfei  | 
Sorrel, Metcalf's Wood | |||||||||||||
| 
Oxybaphus linearis See: Mirabilis linearis var. linearis  | 
Four O'Clocks, Narrow-leaf | |||||||||||||
| Oxypolis fendleri | Cowbane | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | White | Montane, Subalpine, Alpine | Streamsides, Openings, Wetlands | Jun-Oct | Alternate | Compound | Uneven | Long | ||
| Oxyria digyna | Sorrel, Mountain | Polygonaceae | Buckwheat Family | Herb | Red, Green, Yellow | Subalpine, Alpine | Rocky, Openings | Jun-Sep | Basal | Simple | Entire | Long, Round | ||
| 
Oxytenia acerosa See: Euphrosyne acerosa  | 
Copperweed | |||||||||||||
| 
Oxytropis deflexa var. deflexa See: Oxytropis deflexa var. foliolosa  | 
Locoweed, Alpine Nodding | |||||||||||||
| Oxytropis deflexa var. foliolosa | Locoweed, Alpine Nodding | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| 
Oxytropis deflexa var. pulcherrima See: Oxytropis deflexa var. foliolosa  | 
Locoweed, Alpine Nodding | |||||||||||||
| Oxytropis deflexa var. sericea | Locoweed, Silky Nodding | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Montane, Subalpine | Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Oxytropis lambertii var. bigelovii | Locoweed, Lambert's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | May-Aug | Basal | Compound | Uneven | Long | ||
| Oxytropis parryi | Locoweed, Parry's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Subalpine, Alpine | Openings, Rocky | May-Aug | Basal | Compound | Uneven | Long | ||
| Ozomelis stauropetala | Mitrewort, White; Bishop's Cap, White | Saxifragaceae | Saxifrage Family | Herb | White | Montane, Subalpine | Woodlands, Streamsides, Wetlands | May-Aug | Basal | Simple | Uneven | Round | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Packera crocata | Ragwort, Saffron; Groundsel, Saffron | Asteraceae (aka Compositae) | Sunflower Family | Herb | Orange | Montane, Subalpine | Woodlands, Openings | Jun-Aug | Both | Single | Alternate, Basal | Simple | Entire, Uneven | Long | 
| Packera dimorphophylla | Groundsel, Two Leaf; Ragwort, Two Leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine, Alpine | Wetlands, Openings, Rocky | Jun-Aug | Both | Single | Alternate, Basal | Simple | Entire, Uneven | Long, Round | 
| Packera mancosana | Packera, Mancos Shale | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane | Openings | Apr-Jun | Both | Mat | Basal | Simple | Entire, Uneven | Long | 
| Packera multilobata | Groundsel, Many-lobed; Ragwort, Many-lobed; Groundsel, Lobeleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Woodlands, Openings | May-Jul | Both | Single | Alternate, Basal | Simple | Uneven | Long | 
| Packera neomexicana var. mutabilis | Groundsel, New Mexico; Ragwort, New Mexico | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Woodlands, Openings | May-Aug | Both | Single | Alternate, Basal | Simple | Entire, Uneven | Long | 
| 
Packera oodes See: Packera streptanthifolia  | 
Groundsel, Rocky Mountain, Ragwort, Rocky Mountain | |||||||||||||
| Packera pseudaurea | Groundsel, Streambank; Ragwort, Streambank | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane | Wetlands | May-Aug | Both | Single | Alternate, Basal | Simple | Uneven | Long | 
| 
Packera saxosa See: Packera werneriifolia  | 
Groundsel, Werner's; Groundsel, Hoary; Ragwort, Werner's | |||||||||||||
| Packera streptanthifolia | Groundsel, Rocky Mountain, Ragwort, Rocky Mountain | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | May-Aug | Both | Mat | Alternate, Basal | Simple | Uneven, Entire | Long, Round | 
| 
Packera thurberi See: Packera neomexicana var. mutabilis  | 
Groundsel, New Mexico; Ragwort, New Mexico | |||||||||||||
| Packera werneriifolia | Groundsel, Werner's; Groundsel, Hoary; Ragwort, Werner's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Aug | Both | Mat | Basal | Simple | Uneven, Entire | Long, Round | 
| 
Padus virginiana See: Prunus virginiana  | 
Chokecherry | |||||||||||||
| Parnassia | Grass-of-Parnassus | Parnassiaceae (See Celastraceae) | Staff-tree Family | |||||||||||
| Parnassia fimbriata | Grass-of-Parnassus, Fringed | Celastraceae | Staff-tree Family | Herb | White | Montane, Subalpine | Streamsides, Wetlands | Jul-Sep | Basal | Simple | Entire | Round, Long | ||
| 
Parnassia palustris See: Parnassia parviflora  | 
Grass-of-Parnassus, Small Flower | |||||||||||||
| Parnassia parviflora | Grass-of-Parnassus, Small Flower | Celastraceae | Staff-tree Family | Herb | White | Montane, Subalpine | Streamsides, Wetlands | Jul-Sep | Basal | Simple | Entire | Round, Long | ||
| Paxistima myrsinites | Mountain Lover | Celastraceae | Staff-tree Family | Shrub, Herb | Red | Foothills, Montane, Subalpine | Woodlands | May-Aug | Opposite | Simple | Entire, Uneven | Long | ||
| Pectiantia pentandra | Mitrewort, Green; Bishop's Cap, Green | Saxifragaceae | Saxifrage Family | Herb | Green | Montane, Subalpine | Woodlands, Streamsides, Wetlands | May-Aug | Basal | Simple | Uneven | Round | ||
| Pectis angustifolia var. angustifolia | Lemonscent | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Openings, Shrublands | Jun-Oct | Both | Mat | Whorled, Opposite | Simple | Entire | Long | 
| Pedicularis bracteosa var. paysoniana | Lousewort, Towering; Lousewort, Fern Leaf | Orobanchaceae | Broomrape Family | Herb | Yellow | Montane, Subalpine, Alpine | Woodlands, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Pedicularis centranthera | Lousewort, Dwarf; Lousewort, Spring | Orobanchaceae | Broomrape Family | Herb | Red | Semi-Desert, Foothills | Shrublands, Woodlands | Apr-Jun | Basal | Compound | Uneven | Long | ||
| Pedicularis groenlandica | Elephant Heads | Orobanchaceae | Broomrape Family | Herb | Red, White | Montane, Subalpine | Wetlands, Streamsides | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Pedicularis parryi ssp. parryi | Lousewort, Parry's | Orobanchaceae | Broomrape Family | Herb | Yellow | Subalpine, Alpine | Woodlands, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Pedicularis procera | Lousewort, Giant | Orobanchaceae | Broomrape Family | Herb | Yellow, Red | Montane, Subalpine | Woodlands, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Pedicularis racemosa | Parrot's Beak; Lousewort, Sickletop | Orobanchaceae | Broomrape Family | Herb | White | Montane, Subalpine | Woodlands | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| 
Pedicularis scopulorum See: Pedicularis sudetica ssp. scopulorum  | 
Lousewort, Alpine | |||||||||||||
| Pedicularis sudetica ssp. scopulorum | Lousewort, Alpine | Orobanchaceae | Broomrape Family | Herb | Red | Subalpine, Alpine | Rocky, Wetlands, Openings | Jun-Aug | Basal | Simple | Uneven | Long | ||
| Pediocactus simpsonii | Cactus, Simpson's; Ball Cactus, Mountain | Cactaceae | Cactus Family | Cactus, Herb | Yellow, Red | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | Apr-Jul | Modified To Spines | N/A | N/A | N/A | ||
| Pediomelum megalanthum var. megalanthum | Breadroot, Large-flower | Fabaceae (aka Leguminosae) | Pea Family | Herb | White, Blue | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Alternate | Compound | Uneven | Round | ||
| Pediomelum tenuiflorum | Breadroot, Slender-flower | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Semi-Desert, Foothills | Openings, Shrublands | May-Jun | Alternate | Compound | Uneven | Round | ||
| 
Pellaea limitanea See: Argyrochosma limitanea  | 
Fern, Cloak | |||||||||||||
| Penstemon | Penstemon | Scrophulariaceae (Also see Plantain Family) | Snapdragon Family | Long | ||||||||||
| Penstemon angustifolius | Penstemon, Narrow-leaf; Beardtongue, Narrow-leaf | Plantaginaceae | Plantain Family | Herb | Blue, Red | Semi-Desert | Woodlands, Openings | Apr-Jun | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon barbatus var. torreyi | Scarlet Bugler; Penstemon, Scarlet; Beardtongue, Scarlet | Plantaginaceae | Plantain Family | Herb | Red | Semi-Desert, Foothills | Woodlands, Openings | Jun-Sep | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon barbatus var. trichander | Scarlet Bugler; Penstemon, Scarlet; Beardtongue, Scarlet | Plantaginaceae | Plantain Family | Herb | Red | Semi-Desert, Foothills | Woodlands, Openings | Jun-Sep | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon breviculus | Penstemon, Short; Beardtongue, Short | Plantaginaceae | Plantain Family | Herb | Blue | Semi-Desert | Openings | May-Jun | Basal, Opposite | Simple | Entire | Long | ||
| 
Penstemon breviculus See: Penstemon ophianthus  | 
Penstemon, Snake; Beardtongue, Loa | |||||||||||||
| 
Penstemon bridgesii See: Penstemon rostriflorus  | 
Penstemon, Bridges'; Beardtongue, Beaked | |||||||||||||
| Penstemon comarrhenus | Penstemon, Hairy; Beardtongue, Dusty | Plantaginaceae | Plantain Family | Herb | Blue, Red | Foothills, Montane | Openings, Woodlands | May-Aug | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon crandallii | Penstemon, Crandall's; Beardtongue, Crandall's | Plantaginaceae | Plantain Family | Herb | Blue | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | May-Jul | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon cyanocaulis | Penstemon, Blue-stem; Beardtongue, Blue-stem | Plantaginaceae | Plantain Family | Herb | Blue | Semi-Desert, Foothills, Montane | Openings | May-Jul | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon eatonii | Penstemon, Eaton's; Beardtongue, Eaton's | Plantaginaceae | Plantain Family | Herb | Red | Semi-Desert, Foothills | Openings, Shrublands, Woodlands | Apr-Jul | Basal, Opposite | Simple | Entire, Uneven | Long | ||
| Penstemon hallii | Penstemon, Hall's; Beardtongue, Hall's | Plantaginaceae | Plantain Family | Herb | Blue | Alpine | Rocky, Openings | Jul-Aug | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon harbourii | Penstemon, Harbour's; Beardtongue, Harbour's | Plantaginaceae | Plantain Family | Herb | Blue | Alpine | Rocky, Openings | Jun-Aug | Basal, Opposite | Simple | Entire | Long | ||
| 
Penstemon jamesii ssp ophianthus See: Penstemon ophianthus  | 
Penstemon, Snake; Beardtongue, Loa | |||||||||||||
| Penstemon lentus variety albiflorus | Penstemon, Abajo Handsome; Beardtongue, Abajo Handsome | Plantaginaceae | Plantain Family | Herb | White, Blue | Foothills | Openings, Woodlands | May-Jun | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon lentus variety lentus | Penstemon, Handsome; Beardtongue, Handsome | Plantaginaceae | Plantain Family | Herb | Blue, Red | Semi-Desert, Foothills | Openings, Woodlands | May-Jun | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon linarioides ssp. coloradoensis | Penstemon, Narrow-leaf; Beardtongue, Toad-flax | Plantaginaceae | Plantain Family | Herb | Blue, White | Semi-Desert, Foothills | Openings, Woodlands | May-Jul | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon mensarum | Penstemon, Mesa; Beardtongue, Tiger | Plantaginaceae | Plantain Family | Herb | Blue | Montane, Subalpine | Openings, Woodlands | Jun-Aug | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon ophianthus | Penstemon, Snake; Beardtongue, Loa | Plantaginaceae | Plantain Family | Herb | Blue | Semi-Desert, Foothills | Openings, Woodlands | May-Jul | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon palmeri var. palmeri | Penstemon, Palmer's; Beardtongue, Palmer's | Plantaginaceae | Plantain Family | Herb | White, Red | Foothills | Openings, Disturbed | May-Jul | Basal, Opposite | Simple | Entire | Long | ||
| 
Penstemon parviflorus See: Penstemon ophianthus  | 
Penstemon, Snake; Beardtongue, Loa | |||||||||||||
| Penstemon rostriflorus | Penstemon, Bridges'; Beardtongue, Beaked | Plantaginaceae | Plantain Family | Shrub, Herb | Red | Foothills | Openings, Woodlands, Rocky | Jun-Oct | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon rydbergii | Penstemon, Rydberg's; Beardtongue, Rydberg's | Plantaginaceae | Plantain Family | Herb | Blue | Foothills, Montane, Subalpine, Alpine | Openings, Woodlands, Wetlands | Jul-Aug | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon strictus | Penstemon, Rocky Mountain | Plantaginaceae | Plantain Family | Herb | Blue, Red | Foothills, Montane, Subalpine | Openings | Jun-Aug | Basal, Opposite | Simple | Entire | Long | ||
| 
Penstemon trichander See: Penstemon barbatus var. trichander  | 
Scarlet Bugler; Penstemon, Scarlet; Beardtongue, Scarlet | |||||||||||||
| Penstemon utahensis | Penstemon, Utah; Beardtongue, Utah | Plantaginaceae | Plantain Family | Herb | Red | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Basal, Opposite | Simple | Entire | Long | ||
| Penstemon venustus | Beardtongue, Elegant | Plantaginaceae | Plantain Family | Herb | Blue, Red | Subalpine | Openings, Rocky | Jun-Sep | Basal, Opposite | Simple | Uneven | Long | ||
| Penstemon whippleanus | Penstemon, Whipple's; Beardtongue, Whipple's | Plantaginaceae | Plantain Family | Herb | Blue, White | Montane, Subalpine, Alpine | Woodlands, Openings, Rocky | Jun-Sep | Basal, Opposite | Simple | Entire, Uneven | Long | ||
| 
Pentaphylloides floribunda See: Dasiphora fruticosa ssp. floribunda  | 
Cinquefoil, Shrubby | |||||||||||||
| Peraphyllum ramosissimum | Crab Apple, Wild; Squaw Apple | Rosaceae | Rose Family | Shrub | White | Foothills | Woodlands, Openings, Shrublands | Apr-Jul | Alternate | Simple | Entire, Uneven | Long | ||
| 
Peritoma lutea See: Cleomella lutea  | 
Bee Plant, Yellow | |||||||||||||
| 
Peritoma serrulata See: Cleomella serrulata  | 
Bee Plant, Rocky Mountain | |||||||||||||
| Persicaria amphibia | Smartweed, Water | Polygonaceae | Buckwheat Family | Herb | Red | Foothills, Montane | Wetlands, Streamsides, Ponds | Jun-Aug | Alternate | Simple | Entire | Long | ||
| Persicaria lapathifolia | Smartweed, Dock-leaf | Polygonaceae | Buckwheat Family | Herb | White, Orange, Red | Foothills, Montane | Wetlands, Ponds, Disturbed | Jun-Sep | Alternate | Simple | Entire | Long | ||
| Persicaria maculosa | Lady's Thumb, Spotted | Polygonaceae | Buckwheat Family | Herb | Red, White | Foothills | Wetlands, Disturbed | Jun-Sep | Alternate | Simple | Entire | Long | ||
| 
Petradoria pumila See: Petradoria pumila var. graminea  | 
Goldenrod, Grass-like Rock | |||||||||||||
| Petradoria pumila var. graminea | Goldenrod, Grass-like Rock | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills | Disturbed, Woodlands, Openings | Jun-Sep | Both, Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Petradoria pumila var. pumila | Goldenrod, Rock | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills | Disturbed, Woodlands, Openings | Jun-Sep | Both, Disk | Mat | Basal, Alternate | Simple | Entire | Long | 
| Petrophytum caespitosum | Rockmat | Rosaceae | Rose Family | Herb | White | Semi-Desert | Rocky, Openings | May-Sep | Alternate | Simple | Entire | Long | ||
| Phacelia bakeri | Phacelia, Baker's | Hydrophyllaceae | Waterleaf Family | Herb | Blue | Montane, Subalpine, Alpine | Rocky, Openings | Jul-Sep | Basal, Alternate | Compound | Uneven | Long | ||
| Phacelia crenulata | Scorpionweed, Notch-leaf; Phacelia, Crenulated | Hydrophyllaceae | Waterleaf Family | Herb | Blue | Semi-Desert | Openings, Shrublands, Woodlands | Mar-Jun | Basal, Alternate | Compound, Simple | Uneven | Long | ||
| Phacelia glandulosa var. glandulosa | Phacelia, Glandular | Hydrophyllaceae | Waterleaf Family | Herb | Blue | Foothills, Montane | Rocky, Openings | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| Phacelia heterophylla | Phacelia, Varied-leaf; Scopionweed, Varied-leaf | Hydrophyllaceae | Waterleaf Family | Herb | White | Foothills, Montane, Subalpine | Woodlands, Openings | May-Aug | Basal, Alternate | Simple, Compound | Entire, Uneven | Long | ||
| Phacelia howelliana | Phacelia, Howell's | Hydrophyllaceae | Waterleaf Family | Herb | Blue | Semi-Desert | Shrublands, Woodlands, Openings | Mar-May | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Phacelia integrifolia | Phacelia, Whole | Hydrophyllaceae | Waterleaf Family | Herb | White, Blue | Semi-Desert | Openings, Shrublands, Woodlands | Mar-Jun | Basal, Alternate | Simple | Uneven | Long | ||
| Phacelia ivesiana var. ivesiana | Phacelia, Ives'; Scorpionweed, Ives' | Hydrophyllaceae | Waterleaf Family | Herb | White | Semi-Desert | Openings, Shrublands, Woodlands | Mar-Jun | Basal, Alternate | Compound, Simple | Entire, Uneven | Long | ||
| Phacelia sericea | Phacelia, Silky; Purplefringe | Hydrophyllaceae | Waterleaf Family | Herb | Blue | Montane, Subalpine, Alpine | Openings, Rocky | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Phemeranthus brevifolius | Rockpink, Shortleaf; Fameflower, Canyonlands | Montiaceae | Miner's Lettuce Family | Herb | Red, White | Semi-Desert | Rocky, Openings | Apr-Sep | Basal, Opposite, Alternate | Simple | Entire | Long | ||
| Phemeranthus confertiflorus | Rockpink, Rocky Mountain; Fameflower, Rocky Mountain | Montiaceae | Miner's Lettuce Family | Herb | White, Red | Semi-Desert, Foothills, Montane | Rocky, Openings | Apr-Oct | Basal | Simple | Entire | Long | ||
| 
Phemeranthus parviflorus See: Phemeranthus confertiflorus  | 
Rockpink, Rocky Mountain; Fameflower, Rocky Mountain | |||||||||||||
| Philadelphus microphyllus var. microphyllus | Mock Orange | Hydrangeaceae | Hydrangea Family | Shrub | White | Semi-Desert, Foothills | Woodlands, Openings | May-Aug | Opposite | Simple | Entire | Long | ||
| Phlox austromontana | Phlox, Southern; Phlox, Desert | Polemoniaceae | Phlox Family | Herb | White | Semi-Desert, Foothills | Openings, Shrublands | Apr-Aug | Opposite | Simple | Entire | Long | ||
| Phlox canescens | Phlox, Gray; Phlox, Hoary | Polemoniaceae | Phlox Family | Herb | White | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Opposite | Simple | Entire | Long | ||
| Phlox condensata ssp. condensata | Phlox, Alpine | Polemoniaceae | Phlox Family | Herb | White | Subalpine, Alpine | Openings, Rocky | Jun-Oct | Opposite | Simple | Entire | Long | ||
| 
Phlox hoodii ssp. canescens See: Phlox canescens  | 
Phlox, Gray; Phlox, Hoary | |||||||||||||
| Phlox longifolia | Phlox, Long-leaf | Polemoniaceae | Phlox Family | Herb | White, Red | Semi-Desert, Foothills, Montane | Openings, Shrublands | Apr-Jul | Opposite | Simple | Entire | Long | ||
| Phlox multiflora | Phlox, Many-flowered; Phlox, Rocky Mountain | Polemoniaceae | Phlox Family | Herb | White, Red | Foothills, Montane, Subalpine | Openings, Shrublands, Rocky | May-Aug | Opposite | Simple | Entire | Long | ||
| Phoradendron juniperinum | Mistletoe, Juniper | Santalaceae | Sandalwood Family | Herb | Yellow | Foothills, Montane | Woodlands | May-Sep | Opposite, Absent | Simple | Entire | Round | ||
| Physaria acutifolia | Bladderpod, Double | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Shrublands, Woodlands, Openings | Feb-Jun | Basal, Alternate | Simple | Entire | Round, Long | ||
| Physaria fendleri | Bladderpod, Fendler's | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert | Shrublands | Apr-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Physaria newberryi ssp. newberryi | Twinpod, Newberry's | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-May | Basal, Alternate | Simple | Entire | Long | ||
| Physaria pulvinata | Bladderpod, Cushion | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Foothills | Openings | May-Jun | Basal, Alternate | Simple | Entire | Long | ||
| Physaria rectipes | Bladderpod, Straight | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Woodlands | Apr-Jul | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Physaria scrotiformis | Bladderpod, West Silver | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Simple | Entire | Long | ||
| Picea engelmannii | Spruce, Engelmann | Pinaceae | Pine Family | Tree | Montane, Subalpine, Alpine | Woodlands | Spiraled | Simple | Entire | Long | ||||
| Picea pungens | Spruce, Colorado Blue | Pinaceae | Pine Family | Tree | Montane, Subalpine | Woodlands | Spiraled | Simple | Entire | Long | ||||
| Picradeniopsis multiflora | Threadleaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills | Shrublands, Openings | Aug-Oct | Both | Single | Opposite, Alternate | Simple | Entire, Uneven | Long | 
| 
Picrothamnus desertorum See: Artemisia spinescens  | 
Sagebrush, Spiny; Budsage | |||||||||||||
| Pilosella aurantiaca | Orange Hawkweed | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Montane, Subalpine | Woodlands, Openings, Disturbed | Jun-Aug | Ray | Single, Cluster | Basal, Alternate | Simple | Entire | Long | 
| Pinus contorta var. latifolia | Pine, Lodgepole | Pinaceae | Pine Family | Tree | Montane, Subalpine | Woodlands | Bundled | Simple | Entire | Long | ||||
| Pinus edulis | Pine, Pinyon | Pinaceae | Pine Family | Tree | Semi-Desert, Foothills, Montane | Woodlands | Bundled | Simple | Entire | Long | ||||
| Pinus flexilis | Pine, Limber | Pinaceae | Pine Family | Tree | Montane, Subalpine | Woodlands | Bundled | Simple | Entire | Long | ||||
| Pinus ponderosa var. scopulorum | Pine, Ponderosa | Pinaceae | Pine Family | Tree | Foothills, Montane | Woodlands | Bundled | Simple | Entire | Long | ||||
| Plagiobothrys hispidulus | Popcorn Flower, Bristly | Boraginaceae | Forget-Me-Not Family | Herb | White | Foothills, Montane, Subalpine | Openings, Ponds, Wetlands | May-Aug | Alternate | Simple | Entire | Long | ||
| 
Plagiobothrys scouleri See: Plagiobothrys hispidulus  | 
Popcorn Flower, Bristly | |||||||||||||
| Plantago eriopoda | Plantain, Redwool | Plantaginaceae | Plantain Family | Herb | White | Foothills, Montane | Openings | May-Sep | Basal, Spiraled | Simple | Entire, Uneven | Long | ||
| Plantago patagonica | Plantain, Woolly | Plantaginaceae | Plantain Family | Herb | White | Semi-Desert, Foothills | Openings, Rocky | Mar-Jul | Basal | Simple | Entire | Long | ||
| 
Plantago purshii See: Plantago patagonica  | 
Plantain, Woolly | |||||||||||||
| Platanthera aquilonis | Orchid, Northern Bog | Orchidaceae | Orchid Family | Herb | Green | Foothills, Montane, Subalpine, Alpine | Wetlands, Woodlands | Jun-Sep | Alternate | Simple | Entire | Long | ||
| Platanthera huronensis | Orchid, Huron Bog | Orchidaceae | Orchid Family | Herb | Green | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Sep | Alternate | Simple | Entire | Long | ||
| 
Platanthera hyperborea See: Platanthera aquilonis  | 
Orchid, Northern Bog | |||||||||||||
| 
Platanthera hyperborea See: Platanthera huronensis  | 
Orchid, Huron Bog | |||||||||||||
| Platanthera obtusata | Orchid, Blunt-leaf | Orchidaceae | Orchid Family | Herb | White | Montane, Subalpine | Wetlands, Woodlands | Jun-Aug | Basal | Simple | Entire | Long | ||
| Platyschkuhria integrifolia var. oblongifolia | Daisy, Basin | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Openings | May-Jul | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| 
Pneumonanthe affinis See: Gentiana affinis  | 
Gentian, Bottle; Gentian, Rocky Mountain | |||||||||||||
| 
Pneumonanthe parryi See: Gentiana parryi  | 
Gentian, Parry's; Gentian, Bottle | |||||||||||||
| Podistera eastwoodiae | Woodroot, Eastwood's | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Aug | Basal | Compound | Uneven | Long | ||
| Polemonium confertum | Sky Pilot, Dense | Polemoniaceae | Phlox Family | Herb | Blue | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Polemonium foliosissimum | Jacob's Ladder, Leafy | Polemoniaceae | Phlox Family | Herb | Blue | Montane, Subalpine | Openings | Jun-Sep | Basal, Alternate | Compound | Uneven | Long | ||
| Polemonium pulcherrimum ssp. delicatum | Jacob's Ladder, Beautiful | Polemoniaceae | Phlox Family | Herb | Blue | Montane, Subalpine | Woodlands | Jun-Sep | Basal | Compound | Uneven | Long | ||
| Polemonium viscosum | Sky Pilot, Sticky | Polemoniaceae | Phlox Family | Herb | Blue | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Poliomintha incana | Mint, Gray; Sage, Purple | Lamiaceae (aka Labiatae) | Mint Family | Shrub, Herb | Blue | Semi-Desert | Shrublands, Openings | Apr-Sep | Opposite | Simple | Entire | Long | ||
| 
Polygala subspinosa See: Rhinotropis subspinosa  | 
Milkwort | |||||||||||||
| 
Polygonum amphibium See: Persicaria amphibia  | 
Smartweed, Water | |||||||||||||
| Polygonum douglasii | Knotweed, Douglas' | Polygonaceae | Buckwheat Family | Herb | Green, White, Red | Foothills, Montane, Subalpine | Openings, Woodlands, Disturbed | Jun-Sep | Alternate | Simple | Entire | Long | ||
| 
Polygonum lapathifolium See: Persicaria lapathifolia  | 
Smartweed, Dock-leaf | |||||||||||||
| 
Polygonum persicaria See: Persicaria maculosa  | 
Lady's Thumb, Spotted | |||||||||||||
| Polypodium hesperium | Polypody, Western | Polypodiaceae | Western Polypody Family | Fern | Montane | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| Polystichum lonchitis | Fern, Holly | Dryopteridaceae | Wood Fern Family | Fern | Montane | Rocky, Openings | Basal | Compound | Uneven | Long | ||||
| 
Popilus x acuminata See: Populus acuminata  | 
Cottonwood, Lanceleaf | |||||||||||||
| Populus acuminata | Cottonwood, Lanceleaf | Salicaceae | Willow Family | Tree | Green, Brown | Semi-Desert, Foothills | Wetlands, Streamsides, | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| Populus alba | Poplar, Silver | Salicaceae | Willow Family | Tree | Red, Green | Foothills | Disturbed, Wetlands | May-Jun | Alternate | Simple | Uneven | Long | ||
| Populus angustifolia | Cottonwood, Narrowleaf | Salicaceae | Willow Family | Tree | Yellow, Green | Foothills, Montane | Streamsides | May-Jun | Alternate | Simple | Uneven | Long | ||
| Populus deltoides ssp. wislizeni and ssp. fremontii | Cottonwood | Salicaceae | Willow Family | Tree | Red, Yellow, Green | Semi-Desert, Foothills | Wetlands, Streamsides, Woodlands | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| 
Populus fremontii See: Populus deltoides ssp. wislizeni and ssp. fremontii  | 
Cottonwood | |||||||||||||
| Populus nigra | Poplar, Lombardy | Salicaceae | Willow Family | Tree | Red, Yellow, Green | Foothills | Openings, Disturbed | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| Populus tremuloides | Aspen | Salicaceae | Willow Family | Tree | Brown, Green | Montane, Subalpine | Woodlands | May-Jun | Alternate | Simple | Uneven | Long, Round | ||
| Portulaca oleracea | Purslane | Portulacaceae | Portulaca Family | Herb | Yellow, Orange, Red | Foothills | Openings, Disturbed | May-Oct | Alternate, Opposite | Simple | Entire | Round, Long | ||
| 
Potentilla arguta See: Drymocallis convallaria  | 
Woodbeauty, Cream | |||||||||||||
| Potentilla concinna | Cinquefoil, Elegant | Rosaceae | Rose Family | Herb | Yellow | Foothills, Montane, Subalpine, Alpine | Openings, Woodlands | May-Aug | Basal | Compound | Uneven | Long | ||
| 
Potentilla diversifolia See: Potentilla glaucophylla  | 
Blueleaf Cinquefoil | |||||||||||||
| 
Potentilla fruticosa See: Dasiphora fruticosa ssp. floribunda  | 
Cinquefoil, Shrubby | |||||||||||||
| Potentilla glaucophylla | Blueleaf Cinquefoil | Rosaceae | Rose Family | Herb | Yellow | Montane, Subalpin, Alpine | Openings | May-Sep | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Potentilla gracilis | Cinquefoil, Slender | Rosaceae | Rose Family | Herb | Yellow | Montane, Subalpine | Openings | May-Aug | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Potentilla hippiana | Cinquefoil, Hippio's; Cinquefoil, Woolly | Rosaceae | Rose Family | Herb | Yellow | Montane, Subalpine | Openings, Woodlands | Jun-Sep | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Potentilla nivea | Cinquefoil, Snow | Rosaceae | Rose Family | Herb | Yellow | Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Potentilla pensylvanica | Cinquefoil, Pennsylvania | Rosaceae | Rose Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings, Rocky | May-Aug | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Potentilla plattensis | Cinquefoil, Platte River | Rosaceae | Rose Family | Herb | Yellow | Montane | Wetlands, Openings | May-Aug | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Potentilla pulcherrima | Cinquefoil, Beautiful | Rosaceae | Rose Family | Herb | Yellow | Montane, Subalpine | Openings | Jun-Sep | Basal, Alternate | Compound | Uneven | Long, Round | ||
| 
Potentilla rubricaulis See: Potentilla saximontana  | 
Cinquefoil, Red-stem | |||||||||||||
| Potentilla saximontana | Cinquefoil, Red-stem | Rosaceae | Rose Family | Herb | Yellow | Alpine | Rocky, Openings | Jun-Aug | Basal, Alternate | Compound | Uneven | Long, Round | ||
| 
Potentilla sibbaldia See: Sibbaldia procumbens  | 
Sibbaldia | |||||||||||||
| Poterium sanguisorba | Burnet | Rosaceae | Rose Family | Herb | Red | Foothills, Montane | Shrublands, Openings | May-Aug | Basal, Alternate | Compound | Uneven | Long | ||
| Primula parryi | Primrose, Parry's | Primulaceae | Primrose Family | Herb | Red | Alpine, Subalpine | Streamsides, Wetlands, Openings | Jun-Sep | Basal | Simple | Entire | Long | ||
| Primula pauciflora | Shooting Star | Primulaceae | Primrose Family | Herb | Red, Yellow | Foothills, Montane, Subalpine | Streamsides, Wetlands | May-Jul | Basal | Simple | Entire | Long | ||
| Primula specuicola | Primrose, Alcove | Primulaceae | Primrose Family | Herb | Red, Blue | Semi-Desert | Wetlands | Feb-Jun | Basal | Simple | Uneven | Long | ||
| Proatriplex pleiantha | Shadscale, Mancos; Orach, Four Corners | Amaranthaceae | Amaranth Family | Herb | Yellow | Semi-Desert | Openings | Mar-Jun | Opposite, Alternate | Simple | Entire | Round | ||
| Prosartes trachycarpa | Fairybells | Liliaceae | Lily Family | Herb | White | Foothills, Montane, Subalpine | Woodlands | May-Aug | Alternate | Simple | Entire | Long | ||
| Prunella vulgaris | Self-heal; Heal-all | Lamiaceae (aka Labiatae) | Mint Family | Herb | Blue | Montane, Subalpine | Woodlands, Openings | Jun-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| Prunus virginiana | Chokecherry | Rosaceae | Rose Family | Tree | White, Yellow | Foothills, Montane | Shrublands, Woodlands | May-Jul | Alternate | Simple | Uneven | Long | ||
| 
Pseudocymopterus montanus See: Cymopterus lemmonii  | 
Parsley, Mountain; Parsley, Lemmon's | |||||||||||||
| 
Pseudostellaria jamesiana See: Torreyostellaria jamesiana  | 
Starwort, Tuber | |||||||||||||
| Pseudotsuga menziesii var. glauca | Fir, Douglas | Pinaceae | Pine Family | Tree | Foothills, Montane, Subalpine | Woodlands | Spiraled | Simple | Entire | Long | ||||
| 
Psilochenia intermedia See: Crepis acuminata  | 
Hawksbeard, Long-leaf | |||||||||||||
| 
Psilochenia intermedia See: Crepis intermedia  | 
Hawksbeard, Limestone | |||||||||||||
| 
Psilochenia occidentalis See: Crepis occidentalis  | 
Hawksbeard, Western | |||||||||||||
| 
Psilochenia runcinata See: Crepis runcinata  | 
Hawksbeard, Fiddle-leaf | |||||||||||||
| Psilostrophe sparsiflora | Paper Flower | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Woodlands, Shrublands | Apr-Sep | Both | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| 
Psoralea tenuiflora See: Pediomelum tenuiflorum  | 
Breadroot, Slender-flower | |||||||||||||
| 
Psoralidium tenuiflorum See: Pediomelum tenuiflorum  | 
Breadroot, Slender-flower | |||||||||||||
| 
Psychrophila leptosepala See: Caltha chionophila  | 
Marigold, Marsh | |||||||||||||
| Pteridium aquilinum | Fern, Bracken | Dennstaedtiaceae | Bracken Family | Fern | Montane, Subalpine | Woodlands, Openings | Opposite | Compound | Uneven | Long | ||||
| 
Pterogonum alatum See: Eriogonum alatum  | 
Buckwheat, Winged | |||||||||||||
| Pterospora andromedea | Pinedrops | Ericaceae | Heath Family | Herb | Red, Yellow, Green | Montane | Woodlands | Jun-Aug | Alternate | N/A | N/A | N/A | ||
| 
Pulsatilla ludoviciana See: Pulsatilla nuttalliana  | 
Pasqueflower | |||||||||||||
| Pulsatilla nuttalliana | Pasqueflower | Ranunculaceae | Buttercup Family | Herb | Blue, White | Foothills, Montane, Subalpine | Woodlands, Openings | Apr-Jul | Basal, Whorled | Compound | Uneven | Round | ||
| 
Pulsatilla patens ssp. multifida See: Pulsatilla nuttalliana  | 
Pasqueflower | |||||||||||||
| Purshia stansburyana | Cliffrose | Rosaceae | Rose Family | Shrub | White, Yellow | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Apr-Nov | Alternate | Compound | Uneven | Long | ||
| Purshia tridentata var. tridentata | Buckbrush; Bitterbrush | Rosaceae | Rose Family | Shrub | White, Yellow | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Pyrola | Wintergreen | Pyrolaceae (See Ericaceae) | Heath Family | Round | ||||||||||
| Pyrola asarifolia ssp. asarifolia | Wintergreen, Pink; Pyrola, Pink | Ericaceae | Heath Family | Herb | Red | Montane, Subalpine | Woodlands, Openings, Streamsides | Jun-Aug | Basal | Simple | Entire | Round | ||
| Pyrola chlorantha | Wintergreen, Green-flowered | Ericaceae | Heath Family | Herb | Green | Montane | Woodlands | Jun-Aug | Basal | Simple | Entire | Round | ||
| Pyrola minor | Wintergreen, Lesser | Ericaceae | Heath Family | Herb | White | Montane, Subalpine | Woodlands | Jul-Aug | Basal | Simple | Entire | Round | ||
| Pyrola picta | Wintergreen, Pictureleaf; Pyrola, Variegated | Ericaceae | Heath Family | Herb | Green | Montane | Woodlands | Jul-Aug | Basal | Simple | Entire | Long | ||
| 
Pyrola rotundifolia See: Pyrola asarifolia ssp. asarifolia  | 
Wintergreen, Pink; Pyrola, Pink | |||||||||||||
| 
Pyrola secunda See: Orthilia secunda  | 
Wintergreen, One-sided; Sidebells | |||||||||||||
| Pyrrocoma crocea var. crocea | Goldenweed | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | Jun-Sep | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Pyrrocoma uniflora var. uniflora | Goldenweed, Plantain | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings, Woodlands | Jul-Aug | Both | Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quercus gambelii var. gambelii | Oak, Gambel's | Fagaceae | Beech Family | Tree | Yellow | Foothills, Montane | Shrublands, Woodlands, Openings | May-Jul | Alternate | Simple | Uneven | Long | ||
| 
Quercus havardii See: Quercus welshii  | 
Oak, Welsh's; Oak, Shinnery | |||||||||||||
| Quercus turbinella | Oak, Holly; Oak, Shrub Live | Fagaceae | Beech Family | Tree | Yellow | Foothills | Shrublands, Woodlands, Openings | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| 
Quercus undulata See: Quercus welshii  | 
Oak, Welsh's; Oak, Shinnery | |||||||||||||
| Quercus welshii | Oak, Welsh's; Oak, Shinnery | Fagaceae | Beech Family | Tree | Yellow | Semi-Desert | Shrublands, Woodlands, Openings | Apr-Jun | Alternate | Simple | Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ranunculus alismifolius var. montanus | Buttercup, Plantain-leaf | Ranunculaceae | Buttercup Family | Herb | Yellow | Montane, Subalpine | Openings, Wetlands, Streamsides | May-Aug | Basal, Alternate | Simple | Entire | Long | ||
| 
Ranunculus aquatilis See: Ranunculus longirostris  | 
Crowfoot, Water | |||||||||||||
| 
Ranunculus cymbalaria See: Halerpestus cymbalaria  | 
Buttercup, Alkali; Buttercup, Marsh | |||||||||||||
| Ranunculus eschscholtzii | Buttercup, Eschscholtz's | Ranunculaceae | Buttercup Family | Herb | Yellow | Montane, Subalpine, Alpine | Woodlands, Openings, Wetlands, Streamsides | Jun-Aug | Basal, Alternate | Simple | Entire, Uneven | Round, Long | ||
| Ranunculus glaberrimus var. ellipticus | Buttercup, Sagebrush | Ranunculaceae | Buttercup Family | Herb | Yellow | Foothills, Montane | Openings, Wetlands, Streamsides | Apr-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Ranunculus inamoenus var. inamoenus | Buttercup, Graceful | Ranunculaceae | Buttercup Family | Herb | Yellow | Foothills, Montane, Subalpine | Openings, Wetlands, Streamsides, Woodlands | Apr-Sep | Basal, Alternate | Simple | Entire, Uneven | Long, Round | ||
| Ranunculus longirostris | Crowfoot, Water | Ranunculaceae | Buttercup Family | Herb | White | Montane | Wetlands, Ponds, Streamsides, Openings | Jun-Aug | Alternate | Simple, Compound | Entire, Uneven | Long | ||
| Ranunculus macauleyi var. macauleyi | Buttercup, Macauley's; Buttercup, Rocky Mountain | Ranunculaceae | Buttercup Family | Herb | Yellow | Subalpine, Alpine | Openings, Wetlands, Streamsides | Jun-Aug | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| 
Ranunculus testiculatus See: Ceratocephala testiculata  | 
Hornhead; Buttercup Bur | |||||||||||||
| Ranunculus uncinatus | Buttercup, Woodland | Ranunculaceae | Buttercup Family | Herb | Yellow | Montane | Woodlands, Openings, Wetlands, Streamsides | Jun-Aug | Basal, Alternate | Simple | Entire, Uneven | Round, Long | ||
| 
Rhamnus betulifolia ssp. obovata See: Frangula obovata  | 
Buckthorn, Pearleaf | |||||||||||||
| Rhamnus smithii | Buckthorn, Smith's | Rhamnaceae | Buckthorn Family | Shrub, Herb | Yellow | Foothills | Woodlands, Openings | May-Jul | Alternate | Simple | Entire, Uneven | Long | ||
| Rhaponticum repens | Knapweed, Russian | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Semi-Desert, Foothills | Openings, Disturbed | May-Oct | Disk | Cluster | Alternate | Simple | Entire, Uneven | Long | 
| Rhinotropis subspinosa | Milkwort | Polygalaceae | Milkwort Family | Herb | Red, Blue | Semi-Desert | Rocky, Openings, Shrublands | Apr-Jun | Alternate | Simple | Entire | Long | ||
| Rhodiola integrifolia ssp. integrifolia | King's Crown | Crassulaceae | Stonecrop Family | Herb | Red | Subalpine, Alpine | Openings, Rocky | Jun-Sep | Alternate | Simple | Entire | Long | ||
| Rhodiola rhodantha | Queen's Crown; Rose Root; Rose Crown | Crassulaceae | Stonecrop Family | Herb | Red | Subalpine, Alpine | Openings, Rocky, Wetlands | Jun-Sep | Alternate | Simple | Entire | Long | ||
| Rhus aromatica var. trilobata | Sumac, Aromatic; Skunkbush | Anacardiaceae | Sumac Family | Shrub | Yellow | Semi-Desert, Foothills, Montane | Woodlands, Shrublands, Openings | Mar-Jun | Alternate | Simple, Compound | Uneven | Round | ||
| Rhus glabra | Sumac, Smooth | Anacardiaceae | Sumac Family | Tree, Shrub | Yellow, Green | Foothills | Woodlands, Openings | May-Jun | Alternate | Compound | Uneven | Long | ||
| 
Rhus radicans var. rydbergii See: Toxicodendron rydbergii  | 
Poison Ivy | |||||||||||||
| 
Rhus trilobata See: Rhus aromatica var. trilobata  | 
Sumac, Aromatic; Skunkbush | |||||||||||||
| Ribes aureum | Currant, Golden | Grossulariaceae | Currant Family | Shrub | Yellow | Foothills | Shrublands, Openings, Streamsides | Apr-Jun | Alternate | Simple | Uneven | Round | ||
| Ribes cereum var. cereum | Currant, Wax | Grossulariaceae | Currant Family | Shrub | White | Semi-Desert, Foothills, Montane | Shrublands, Woodlands | Apr-Jul | Alternate | Simple | Uneven | Round | ||
| 
Ribes coloradense See: Ribes laxiflorum  | 
Currant, Trailing | |||||||||||||
| Ribes inerme var. inerme | Currant, Whiskey; Currant, Whitestem; Gooseberry; Whitestem | Grossulariaceae | Currant Family | Shrub | White | Semi-Desert, Foothills, Montane, Subalpine | Woodlands, Streamsides, Shrublands | Apr-Jul | Alternate | Simple | Uneven | Round | ||
| Ribes laxiflorum | Currant, Trailing | Grossulariaceae | Currant Family | Shrub | Red | Montane, Subalpine | Openings, Woodlands | May-Aug | Alternate | Simple | Uneven | Round | ||
| Ribes leptanthum | Currant, Trumpet | Grossulariaceae | Currant Family | Shrub | White | Semi-Desert, Foothills, Montane, Subalpine | Woodlands, Shrublands | Apr-Jun | Alternate | Simple | Uneven | Round | ||
| Ribes montigenum | Currant, Mountain; Currant, Prickly | Grossulariaceae | Currant Family | Shrub | Red | Montane, Subalpine | Woodlands, Streamsides | Jun-Sep | Alternate | Simple | Uneven | Round | ||
| Ribes wolfii | Currant, Wolf's | Grossulariaceae | Currant Family | Shrub | White | Montane, Subalpine | Woodlands, Streamsides | May-Jul | Alternate | Simple | Uneven | Round | ||
| Robinia neomexicana var. neomexicana | Locust, New Mexico | Fabaceae (aka Leguminosae) | Pea Family | Tree, Shrub | Red | Semi-Desert, Foothills | Openings, Streamsides, Disturbed | May-Jul | Alternate | Compound | Uneven | Long | ||
| Rorippa alpina | Yellowcress, Alpine | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Montane, Subalpine, Alpine | Wetlands, Streamsides | Jun-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Rosa nutkana | Nootka Rose | Rosaceae | Rose Family | Shrub, Herb | Red | Montane, Subalpine | Woodlands, Shrublands, Streamsides, Disturbed, Openings | May-Aug | Alternate | Compound | Uneven | Long | ||
| Rosa woodsii | Rose, Woods' | Rosaceae | Rose Family | Shrub, Herb | Red | Foothills, Montane, Subalpine | Woodlands, Shrublands, Streamsides, Disturbed, Openings | May-Oct | Alternate | Compound | Uneven | Long | ||
| 
Rubacer parviflorus See: Rubus nutkanus  | 
Thimbleberry; Salmonberry | |||||||||||||
| Rubus idaeus ssp. strigosus | Raspberry, Red | Rosaceae | Rose Family | Shrub, Herb | White | Montane, Subalpine | Openings, Rocky | Jun-Aug | Alternate | Compound | Uneven | Long | ||
| Rubus nutkanus | Thimbleberry; Salmonberry | Rosaceae | Rose Family | Shrub, Herb | White | Montane, Subalpine | Woodlands, Disturbed | May-Aug | Alternate | Simple | Uneven | Long | ||
| 
Rubus parviflorus var. parviflorus See: Rubus nutkanus  | 
Thimbleberry; Salmonberry | |||||||||||||
| 
Rubus strigosus See: Rubus idaeus ssp. strigosus  | 
Raspberry, Red | |||||||||||||
| 
Rudbeckia ampla See: Rudbeckia laciniata var. ampla  | 
Coneflower, Cutleaf; Coneflower, Goldenglow; Susan, Black-Eyed | |||||||||||||
| Rudbeckia laciniata var. ampla | Coneflower, Cutleaf; Coneflower, Goldenglow; Susan, Black-Eyed | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Streamsides | Jun-Sep | Both | Single | Alternate | Simple, Compound | Entire, Uneven | Long | 
| Rumex crispus ssp. crispus | Dock, Curly | Polygonaceae | Buckwheat Family | Herb | Green, Yellow | Foothills, Montane | Disturbed, Openings | May-Sep | Alternate, Basal | Simple | Entire | Long | ||
| Rumex densiflorus | Dock, Dense-flower | Polygonaceae | Buckwheat Family | Herb | Green, Yellow, Red | Montane, Subalpine, Alpine | Wetlands, Openings | Jun-Aug | Alternate, Basal | Simple | Entire | Long | ||
| Rumex hymenosepalus | Rhubarb, Wild; Canaigre | Polygonaceae | Buckwheat Family | Herb | Green, Yellow, Red | Semi-Desert | Shrublands, Openings | Mar-Jun | Basal, Alternate | Simple | Entire | Long | ||
| 
Rydbergia grandiflora See: Hymenoxys grandiflora  | 
Old Man of the Mountain | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
Sabina deppeana See: Juniperus deppeana  | 
Juniper, Alligator | |||||||||||||
| 
Sabina monosperma See: Juniperus monosperma  | 
Juniper, One-seed | |||||||||||||
| 
Sabina osteosperma See: Juniperus osteosperma  | 
Juniper, Utah | |||||||||||||
| 
Sabina scopulorum See: Juniperus scopulorum  | 
Juniper, Rocky Mountain | |||||||||||||
| Sabulina macrantha | Sandwort, Large-flower | Caryophyllaceae | Pink Family | Herb | White | Subalpine, Alpine | Rocky, Openings | Jun-Sep | Basal, Opposite | Simple | Entire | Long | ||
| Sabulina rubella | Sandwort, Red | Caryophyllaceae | Pink Family | Herb | White | Subalpine, Alpine | Rocky, Openings | Jun-Sep | Basal | Simple | Entire | Long | ||
| 
Salix arctica See: Salix petrophila  | 
Willow, Rock | |||||||||||||
| 
Salix babylonica See: Salix matsudana  | 
Willow, Navajo; Willow, Globe; Willow, Hankow | |||||||||||||
| Salix brachycarpa | Willow, Shortfruit; Willow, Barren Ground | Salicaceae | Willow Family | Shrub | Yellow | Montane, Subalpine, Alpine | Wetlands, Openings | Jun-Aug | Alternate | Simple | Entire | Long | ||
| Salix drummondiana | Willow, Drummond's | Salicaceae | Willow Family | Shrub | Yellow | Foothills, Montane, Subalpine | Wetlands, Openings | May-Aug | Alternate | Simple | Entire | Long | ||
| Salix exigua var. exigua | Willow, Coyote | Salicaceae | Willow Family | Shrub | Yellow | Semi-Desert, Foothills, Montane | Streamsides | Apr-Jun | Alternate | Simple | Entire, Uneven | Long | ||
| 
Salix globosa See: Salix matsudana  | 
Willow, Navajo; Willow, Globe; Willow, Hankow | |||||||||||||
| Salix laevigata | Willow, Red | Salicaceae | Willow Family | Shrub, Tree | Yellow | Foothills | Wetlands | Mar-Jun | Alternate | Simple | Entire, Uneven | Long | ||
| Salix matsudana | Willow, Navajo; Willow, Globe; Willow, Hankow | Salicaceae | Willow Family | Tree | Yellow | Semi-Desert, Foothills | Openings, Disturbed | Apr-Jun | Alternate | Simple | Uneven | Long | ||
| Salix monticola | Willow, Mountain | Salicaceae | Willow Family | Shrub | Yellow | Foothills, Montane, Subalpine | Wetlands | May-Jul | Alternate | Simple | Entire, Uneven | Long | ||
| Salix nivalis | Willow, Snow | Salicaceae | Willow Family | Herb, Shrub | Red, Yellow | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Alternate | Simple | Entire | Long | ||
| Salix petrophila | Willow, Rock | Salicaceae | Willow Family | Herb, Shrub | Red, Yellow | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Alternate | Simple | Entire | Long | ||
| Salix planifolia | Willow, Planeleaf | Salicaceae | Willow Family | Shrub | Yellow | Montane, Subalpine, Alpine | Wetlands, Openings | Jun-Aug | Alternate | Simple | Entire, Uneven | Long | ||
| 
Salix reticulata See: Salix nivalis  | 
Willow, Snow | |||||||||||||
| Salix scouleriana | Willow, Scouler's | Salicaceae | Willow Family | Shrub | Yellow | Montane, Subalpine | Woodlands | May-Jul | Alternate | Simple | Entire, Uneven | Long | ||
| Salsola collina | Tumbleweed; Tumbleweed, Pallas' | Amaranthaceae | Amaranth Family | Herb | White | Semi-Desert, Foothills | Openings, Shrublands | Jun-Oct | Alternate | Simple | Entire | Long | ||
| Salsola tragus | Tumbleweed; Tumbleweed, Russian | Amaranthaceae | Amaranth Family | Herb | White | Semi-Desert, Foothills | Openings, Shrublands | Jun-Oct | Alternate | Simple | Entire | Long | ||
| 
Sambucus cerulea See: Sambucus nigra ssp. cerulea  | 
Elderberry, Blue | |||||||||||||
| 
Sambucus microbotrys See: Sambucus racemosa  | 
Elderberry, Red | |||||||||||||
| Sambucus nigra ssp. cerulea | Elderberry, Blue | Viburnaceae | Arrow-Wood Family | Shrub | White | Montane, Subalpine | Disturbed, Openings | Apr-Oct | Opposite | Compound | Uneven | Long, Round | ||
| Sambucus racemosa | Elderberry, Red | Viburnaceae | Arrow-Wood Family | Herb, Shrub | White | Montane, Subalpine | Disturbed, Openings, Woodlands | May-Sep | Opposite | Compound | Uneven | Long, Round | ||
| 
Sanguisorba minor See: Poterium sanguisorba  | 
Burnet | |||||||||||||
| Sarcobatus | Greasewood | Sarcobataceae (See Sarcobataceae) | Greasewood Family | Long | ||||||||||
| Sarcobatus vermiculatus | Greasewood | Sarcobataceae | Greasewood Family | Shrub | Yellow | Semi-Desert, Foothills | Shrublands, Openings | May-Jul | Alternate | Simple | Entire | Long | ||
| 
Satureja vulgaris See: Clinopodium vulgare  | 
Basil, Wild | |||||||||||||
| Saxifraga adscendens | Saxifrage, Wedge-leaf | Saxifragaceae | Saxifrage Family | Herb | White | Subalpine, Alpine | Wetlands, Rocky, Openings | Jul-Aug | Basal, Alternate | Simple | Uneven, Entire | Long | ||
| Saxifraga austromontana | Saxifrage, Spotted | Saxifragaceae | Saxifrage Family | Herb | White | Montane, Subalpine, Alpine | Rocky, Openings | Jun-Sep | Basal | Simple | Entire | Long | ||
| 
Saxifraga bronchialis ssp. austromontana See: Saxifraga austromontana  | 
Saxifrage, Spotted | |||||||||||||
| Saxifraga cernua | Saxifrage, Nodding | Saxifragaceae | Saxifrage Family | Herb | White | Subalpine, Alpine | Wetlands, Rocky, Openings | Jul-Aug | Basal, Alternate | Simple | Uneven, Entire | Long, Round | ||
| Saxifraga chrysantha | Saxifrage, Golden | Saxifragaceae | Saxifrage Family | Herb | Yellow | Subalpine, Alpine | Wetlands, Rocky, Openings | Jul-Aug | Basal, Alternate | Simple | Uneven, Entire | Long | ||
| 
Saxifraga debilis See: Saxifraga hyperborea  | 
Saxifrage, Pygmy | |||||||||||||
| Saxifraga flagellaris ssp. crandallii | Saxifrage, Whiplash | Saxifragaceae | Saxifrage Family | Herb | Yellow | Subalpine, Alpine | Wetlands, Rocky, Openings | Jun-Sep | Basal, Alternate | Simple | Entire | Long | ||
| Saxifraga hyperborea | Saxifrage, Pygmy | Saxifragaceae | Saxifrage Family | Herb | White | Subalpine, Alpine | Wetlands, Rocky, Openings | Jun-Sep | Basal, Alternate | Simple | Uneven, Entire | Long, Round | ||
| 
Saxifraga odontoloma See: Micranthes odontoloma  | 
Saxifrage, Brook | |||||||||||||
| 
Saxifraga oregana See: Micranthes oregana  | 
Saxifrage, Oregon Snowball | |||||||||||||
| 
Saxifraga rhomboidea See: Micranthes rhomboidea  | 
Saxifrage, Snowball; Saxifrage, Diamondleaf | |||||||||||||
| 
Saxifraga rivularis See: Saxifraga hyperborea  | 
Saxifrage, Pygmy | |||||||||||||
| Scabrethia scabra | Mule's Ears, Desert | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Shrublands, Openings | May-Aug | Both | Cluster | Alternate | Simple | Entire | Long | 
| 
Schizotechium jamesianum See: Torreyostellaria jamesiana  | 
Starwort, Tuber | |||||||||||||
| 
Schkuhria multiflora See: Picradeniopsis multiflora  | 
Threadleaf | |||||||||||||
| 
Schoenocrambe linifolia See: Sisymbrium linifolium  | 
Mustard, Flaxleaf | |||||||||||||
| 
Sclerocactus cloverae See: Sclerocactus cloveriae ssp. brackii  | 
Cactus, Clover's Fishhook; Cactus, Brack's Fishhook | |||||||||||||
| Sclerocactus cloveriae ssp. brackii | Cactus, Clover's Fishhook; Cactus, Brack's Fishhook | Cactaceae | Cactus Family | Cactus, Herb | Blue, Red | Semi-Desert | Woodlands, Openings, Shrublands | Apr-Aug | Modified To Spines | N/A | N/A | N/A | ||
| Sclerocactus glaucus | Cactus, Gray Fishhook; Cactus, Uinta Basin Fishhook | Cactaceae | Cactus Family | Cactus, Herb | Red | Semi-Desert | Openings | Apr-Jun | Modified To Spines | N/A | N/A | N/A | ||
| Sclerocactus mesae-verdae | Cactus, Mesa Verde Fishhook | Cactaceae | Cactus Family | Cactus, Herb | Red | Semi-Desert | Openings | Apr-Jun | Modified To Spines | N/A | N/A | N/A | ||
| Sclerocactus parviflorus | Cactus, Small-flower Fishhook | Cactaceae | Cactus Family | Cactus, Herb | Blue, Red | Semi-Desert | Woodlands, Openings, Shrublands | Apr-Jun | Modified To Spines | N/A | N/A | N/A | ||
| 
Sclerocactus parviflorus See: Sclerocactus cloveriae ssp. brackii  | 
Cactus, Clover's Fishhook; Cactus, Brack's Fishhook | |||||||||||||
| Sclerocactus whipplei | Cactus, Whipple's Fishhook | Cactaceae | Cactus Family | Cactus, Herb | Yellow | Semi-Desert | Woodlands, Openings, Shrublands | Mar-Jun | Modified To Spines | N/A | N/A | N/A | ||
| Scorzonera laciniata | Viper Grass | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills | Disturbed | Apr-Jul | Ray | Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Scrophularia lanceolata | Figwort | Scrophulariaceae | Snapdragon Family | Herb | Red | Montane, Subalpine | Openings, Rocky | Jun-Aug | Opposite | Simple | Uneven | Long | ||
| Scutellaria galericulata | Skullcap | Lamiaceae (aka Labiatae) | Mint Family | Herb | Blue | Montane | Wetlands, Openings | Jun-Aug | Opposite | Simple | Entire, Uneven | Long | ||
| Sedum lanceolatum | Stonecrop, Yellow | Crassulaceae | Stonecrop Family | Herb | Yellow | Foothills, Montane, Subalpine, Alpine | Rocky, Openings | Jun-Sep | Alternate | Simple | Entire | Long, Round | ||
| Senecio amplectens var. amplectens | Ragwort, Showy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Rocky, Openings | Jul-Aug | Both | Single | Basal, Alternate | Simple | Uneven | Long | 
| Senecio amplectens var. holmii | Ragwort, Holm's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jul-Aug | Both | Single | Basal, Alternate | Simple | Uneven | Long | 
| Senecio atratus | Ragwort, Black-tipped | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Wetlands, Disturbed, Openings | Jul-Sep | Both | Mat | Alternate | Simple | Uneven | Long | 
| Senecio bigelovii var. hallii | Ragwort, Nodding | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Openings | Jul-Sep | Disk | Single | Alternate | Simple | Uneven, Entire | Long | 
| Senecio blitoides | Ragwort, Alpine; Ragwort, Fremont's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Rocky, Openings | Jul-Sep | Both | Cluster | Alternate | Simple | Uneven | Long | 
| Senecio crassulus | Ragwort, Thick-leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings | Jul-Sep | Both | Single | Basal, Alternate | Simple | Uneven, Entire | Long | 
| 
Senecio crocatus See: Packera crocata  | 
Ragwort, Saffron; Groundsel, Saffron | |||||||||||||
| 
Senecio dimorphophyllus See: Packera dimorphophylla  | 
Groundsel, Two Leaf; Ragwort, Two Leaf | |||||||||||||
| 
Senecio douglasii See: Senecio flaccidus var. flaccidus  | 
Ragwort, Thread-leaf | |||||||||||||
| Senecio eremophilus var. kingii | Ragwort, Lonely; Ragwort, Desert | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Disturbed, Openings | Jun-Sep | Both | Single | Alternate | Simple | Uneven | Long | 
| Senecio flaccidus var. flaccidus | Ragwort, Thread-leaf | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert | Shrublands, Openings | May-Sep | Both | Cluster | Alternate | Simple | Entire | Long | 
| 
Senecio fremontii variety blitoides See: Senecio blitoides  | 
Ragwort, Alpine; Ragwort, Fremont's | |||||||||||||
| 
Senecio fremontii variety inexpectatus See: Senecio inexpectatus  | 
Ragwort, Prickly; Ragwort,Unexpected | |||||||||||||
| 
Senecio holmii See: Senecio amplectens var. holmii  | 
Ragwort, Holm's | |||||||||||||
| Senecio inexpectatus | Ragwort, Prickly; Ragwort,Unexpected | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Rocky, Openings | Jul-Sep | Both | Cluster | Alternate | Simple | Uneven | Long | 
| Senecio integerrimus var. exaltatus | Ragwort, Lamb's Tongue | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | May-Jul | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| 
Senecio longilobus See: Senecio flaccidus var. flaccidus  | 
Ragwort, Thread-leaf | |||||||||||||
| 
Senecio multilobatus See: Packera multilobata  | 
Groundsel, Many-lobed; Ragwort, Many-lobed; Groundsel, Lobeleaf | |||||||||||||
| 
Senecio neomexicanus See: Packera neomexicana var. mutabilis  | 
Groundsel, New Mexico; Ragwort, New Mexico | |||||||||||||
| 
Senecio pseudaureus See: Packera pseudaurea  | 
Groundsel, Streambank; Ragwort, Streambank | |||||||||||||
| Senecio serra var. admirabilis | Ragwort, Serrated | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Woodlands, Openings, Streamsides | Jun-Sep | Both | Single | Alternate | Simple | Uneven | Long | 
| Senecio soldanella | Ragwort, Colorado | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Alpine | Rocky, Openings | Jul-Aug | Both | Single | Basal | Simple | Uneven, Entire | Round, Long | 
| Senecio spartioides | Ragwort, Broom | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Openings, Shrublands | Jun-Oct | Both | Cluster | Alternate | Simple | Entire | Long | 
| Senecio triangularis | Ragwort, Triangular | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine | Woodlands, Openings, Streamsides | Jun-Sep | Both | Single | Alternate | Simple | Uneven | Long | 
| 
Senecio werneriifolius See: Packera werneriifolia  | 
Groundsel, Werner's; Groundsel, Hoary; Ragwort, Werner's | |||||||||||||
| Senecio wootonii | Ragwort, Wooton's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane | Woodlands | May-Jul | Both | Single | Basal, Alternate | Simple | Uneven | Long | 
| 
Seriphidium novum See: Artemisia nova  | 
Sagebrush, Black | |||||||||||||
| 
Seriphidium tridentata See: Artemisia tridentata subspecies tridentata  | 
Sagebrush, Big; Chamiso | |||||||||||||
| Shepherdia argentea | Buffaloberry, Silver | Elaeagnaceae | Oleaster Family | Shrub | Yellow | Foothills, Montane | Streamsides | Mar-May | Opposite | Simple | Entire | Long | ||
| Shepherdia canadensis | Buffaloberry, Canada | Elaeagnaceae | Oleaster Family | Shrub | Yellow | Foothills, Montane, Subalpine | Wetlands, Woodlands | May-Jul | Opposite | Simple | Entire | Long | ||
| Shepherdia rotundifolia | Buffaloberry, Round Leaf | Elaeagnaceae | Oleaster Family | Shrub | Yellow | Semi-Desert | Shrublands, Woodlands, Openings | Mar-May | Alternate | Simple | Entire | Long | ||
| Sibbaldia procumbens | Sibbaldia | Rosaceae | Rose Family | Herb | Yellow | Subalpine, Alpine | Openings, Rocky | Jun-Sep | Basal, Alternate | Compound | Uneven | Long, Round | ||
| Sidalcea candida | Checkermallow, White | Malvaceae | Mallow Family | Herb | White | Montane | Streamsides, Wetlands | Jun-Aug | Alternate | Simple | Uneven | Round | ||
| Sidalcea neomexicana ssp. neomexicana | Checkermallow, Pink | Malvaceae | Mallow Family | Herb | Red | Montane | Streamsides, Wetlands | May-Sep | Basal, Alternate | Simple | Uneven | Round | ||
| Silene acaulis var. subacaulescens | Moss Campion | Caryophyllaceae | Pink Family | Herb | Red | Alpine | Rocky, Openings | Jun-Oct | Basal, Opposite | Simple | Entire | Long | ||
| Silene antirrhina | Catchfly, Sleepy | Caryophyllaceae | Pink Family | Herb | Red, White | Semi-Desert, Foothills | Shrublands, Openings | Mar-Jul | Opposite | Simple | Entire | Long | ||
| Silene drummondii | Catchfly, Drummond's | Caryophyllaceae | Pink Family | Herb | White | Montane, Subalpine, Alpine | Woodlands, Openings | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Silene menziesii | Catchfly, Menzies' | Caryophyllaceae | Pink Family | Herb | White | Foothills, Montane, Subalpine | Openings, Woodlands | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Sisymbrium altissimum | Mustard, Jim Hill; Tumblemustard, Tall | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Foothills | Disturbed | May-Sep | Basal, Alternate | Simple | Uneven | Long | ||
| Sisymbrium linifolium | Mustard, Flaxleaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Foothills | Woodlands | Apr-Jul | Alternate | Simple, Compound | Uneven | Long | ||
| Sisyrinchium montanum var. montanum | Blue-eyed Grass | Iridaceae | Iris Family | Herb | Blue | Montane | Openings | May-Aug | Basal | Simple | Entire | Long | ||
| Smelowskia americana | Smelowsky, American | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Red, White | Subalpine, Alpine | Openings, Rocky | Jun-Aug | Basal, Alternate | Compound | Uneven | Long, Round | ||
| 
Smelowskia calycina var. americana See: Smelowskia americana  | 
Smelowsky, American | |||||||||||||
| 
Smilacina racemosa See: Maianthemum amplexicaule  | 
Solomon's Plume | |||||||||||||
| Solanum triflorum | Cutleaf Nightshade | Solanaceae | Nightshade Family | Herb | White | Semi-Desert, Foothills, Montane | Openings, Woodlands, Shrublands | May-Oct | Alternate | Simple | Uneven | Long | ||
| Solidago glutinosa | Goldenrod, Sticky | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane, Subalpine, Alpine | Openings | Jun-Sep | Both | Mat, Single | Basal, Alternate | Simple | Uneven, Entire | Long | 
| Solidago missouriensis | Goldenrod, Missouri | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands, | Jul-Sep | Both | Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Solidago multiradiata var. scopulorum | Goldenrod, Rocky Mountain | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine, Alpine | Openings, Woodlands | Jun-Sep | Both | Mat, Single | Basal, Alternate | Simple | Uneven | Long | 
| Solidago nana | Goldenrod, Dwarf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills | Openings | Jul-Sep | Both | Mat, Single | Alternate | Simple | Uneven, Entire | Long | 
| 
Solidago parryi See: Oreochrysum parryi  | 
Goldenweed, Parry's; Goldenrod, Parry's | |||||||||||||
| 
Solidago simplex var. simplex See: Solidago glutinosa  | 
Goldenrod, Sticky | |||||||||||||
| 
Solidago sparsiflora See: Solidago velutina  | 
Goldenrod, Velvet | |||||||||||||
| Solidago velutina | Goldenrod, Velvet | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Woodlands | Jun-Oct | Both | Single | Alternate | Simple | Uneven, Entire | Long | 
| Sonchus arvensis ssp. uliginosus | Sow-thistle, Field | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine | Disturbed, Openings, Wetlands | Jul-Oct | Ray | Single | Alternate, Basal | Simple | Uneven | Long | 
| Sonchus asper | Sow-thistle, spiny | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills, Montane | Disturbed, Openings, Wetlands | Apr-Oct | Ray | Single | Alternate, Basal | Simple | Uneven | Long | 
| 
Sonchus uliginosus See: Sonchus arvensis ssp. uliginosus  | 
Sow-thistle, Field | |||||||||||||
| Sophora nuttalliana | Sophora, Nuttall's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue, White | Semi-Desert | Shrublands, Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Sophora stenophylla | Sophora, Silvery | Fabaceae (aka Leguminosae) | Pea Family | Herb | Blue | Semi-Desert | Shrublands, Openings | Apr-Jun | Alternate | Compound | Uneven | Long | ||
| Sorbus scopulina | Ash, Mountain; Rowan Tree | Rosaceae | Rose Family | Tree, Shrub | White | Montane, Subalpine | Woodlands | Jun-Jul | Alternate | Compound | Uneven | Long | ||
| Sparganium angustifolium | Burreed | Typhaceae | Cattail Family | Herb | White | Montane, Subalpine | Ponds | Jul-Sep | Alternate | Simple | Entire | Long | ||
| Spergularia rubra | Spurrey, Sand | Caryophyllaceae | Pink Family | Herb | Red, Blue | Montane | Openings, Woodlands | May-Aug | Opposite | Simple | Entire | Long | ||
| 
Spergulastrum lanuginosum See: Arenaria lanuginosa ssp. saxosa  | 
Chickweed, Woolly; Sandwort, Spreading | |||||||||||||
| Sphaeralcea coccinea | Globemallow, Scarlet | Malvaceae | Mallow Family | Herb | Red, Orange | Semi-Desert, Foothills | Woodlands, Openings | May-Aug | Alternate | Simple | Uneven | Round, Long | ||
| Sphaeralcea fendleri | Globemallow, Fendler's | Malvaceae | Mallow Family | Herb | Red, Orange | Semi-Desert, Foothills | Woodlands, Openings, Disturbed | May-Sep | Alternate | Simple | Uneven | Round, Long | ||
| Sphaeralcea grossulariifolia | Globemallow, Gooseberry-leaf | Malvaceae | Mallow Family | Herb | Red, Orange | Semi-Desert | Shrublands, Openings | Apr-Sep | Alternate | Simple | Uneven | Round, Long | ||
| Sphaeralcea leptophylla | Globemallow, Slender-leaf | Malvaceae | Mallow Family | Herb | Red, Orange | Semi-Desert | Shrublands, Rocky, Openings | Apr-Jul | Alternate | Compound | Uneven | Long | ||
| Sphaeralcea parvifolia | Globemallow, Small-leaf | Malvaceae | Mallow Family | Herb | Red, Orange | Semi-Desert, Foothills | Woodlands, Openings | Apr-Aug | Alternate | Simple | Uneven | Long | ||
| Spiranthes romanzoffiana | Ladies' Tresses | Orchidaceae | Orchid Family | Herb | White | Montane, Subalpine | Wetlands | Jul-Sep | Basal, Alternate | Simple | Entire | Long | ||
| Stanleya pinnata | Prince's Plume | Brassicaceae (aka Cruciferae) | Mustard Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Woodlands, Openings | Apr-Sep | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Stellaria irrigua | ||||||||||||||
| 
Stellaria irrigua See: Stellaria sanjuanensis  | 
Starwort, Colorado | |||||||||||||
| Stellaria longifolia | Starwort, Long-leaf | Caryophyllaceae | Pink Family | Herb | White | Montane | Wetlands, Openings | May-Aug | Opposite | Simple | Entire | Long | ||
| Stellaria longipes ssp. longipes | Starwort, Long-stalked | Caryophyllaceae | Pink Family | Herb | White | Foothills, Montane, Subalpine, Alpine | Openings, Woodlands, Wetlands | May-Aug | Opposite | Simple | Entire | Long | ||
| Stellaria sanjuanensis | Starwort, Colorado | Caryophyllaceae | Pink Family | Herb | White | Alpine | Rocky, Openings | Jun-Aug | Opposite | Simple | Entire | Long | ||
| Stenogonum flexum | Buckwheat, Flexible | Polygonaceae | Buckwheat Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Jun | Basal | Simple | Entire | Long, Round | ||
| Stenogonum salsuginosum | Buckwheat, Salty | Polygonaceae | Buckwheat Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-Jun | Basal, Alternate | Simple | Entire | Long, Round | ||
| Stenotus armerioides var. armerioides | Goldenweed; Sunflower, Ring Grass | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Woodlands, Openings | Apr-Jun | Both | Mat | Basal | Simple | Entire | Long | 
| Stephanomeria exigua ssp. exigua | Wirelettuce, Whiteplume | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Semi-Desert | Openings | May-Oct | Ray | Cluster | Basal, Alternate | Simple | Uneven, Entire | Long | 
| Stephanomeria pauciflora | Wirelettuce, Few-flowered | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red, White | Semi-Desert, Foothills | Rocky, Openings | May-Oct | Ray | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| Stephanomeria tenuifolia | Wirelettuce, Slender-leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Foothills, Montane | Rocky, Openings | Jun-Sep | Ray | Cluster | Alternate | Simple | Uneven, Entire | Long | 
| 
Streptanthella longirostris See: Streptanthus longirostris  | 
Twistflower, Little | |||||||||||||
| Streptanthus cordatus var. cordatus | Twistflower, Heartleaf; Jewelflower, Heartleaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Apr-May | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Streptanthus longirostris | Twistflower, Little | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert | Shrublands, Openings | Mar-May | Alternate | Simple | Entire, Uneven | Long | ||
| Streptopus amplexifolius | Twistedstalk | Liliaceae | Lily Family | Herb | White, Yellow | Montane, Subalpine | Woodlands, Streamsides | May-Aug | Alternate | Simple | Entire | Long | ||
| 
Streptopus fassettii See: Streptopus amplexifolius  | 
Twistedstalk | |||||||||||||
| Strigosella africana | Mustard, African | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Red | Semi-Desert, Foothills | Disturbed, Openings | Apr-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| 
Swertia albomarginata See: Frasera albomarginata  | 
Frasera, White-margined | |||||||||||||
| 
Swertia paniculata See: Frasera paniculata  | 
Frasera, Utah; Swertia, Utah | |||||||||||||
| Swertia perennis | Gentian, Star | Gentianaceae | Gentian Family | Herb | Blue | Subalpine | Wetlands | Jul-Sep | Basal, Opposite | Simple | Entire | Long | ||
| 
Swertia radiata See: Frasera speciosa  | 
Monument Plant; Elkweed; Gentian, Green | |||||||||||||
| 
Swida sericea See: Cornus alba ssp. stolonifera  | 
Dogwood, Red-Osier | |||||||||||||
| Symphoricarpos longiflorus | Snowberry, Long-flowered | Caprifoliaceae | Honeysuckle Family | Shrub | Red, White | Foothills, Semi-Desert | Shrublands, Woodlands | May-Jul | Opposite | Simple | Entire | Round | ||
| 
Symphoricarpos oreophilus See: Symphoricarpos rotundifolius  | 
Snowberry, Round-leaf | |||||||||||||
| Symphoricarpos rotundifolius | Snowberry, Round-leaf | Caprifoliaceae | Honeysuckle Family | Shrub | Red | Foothills, Montane, Subalpine | Woodlands | May-Aug | Opposite | Simple | Entire, Uneven | Round | ||
| Symphyotrichum ascendens | Aster, Western | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue, Red, White | Foothills, Montane | Woodlands, Openings, Disturbed | Jul-Oct | Both | Single | Alternate | Simple | Entire | Long | 
| Symphyotrichum ericoides var. ericoides | Aster, Heather | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Woodlands, Openings, Disturbed | Jul-Oct | Both | Mat, Cluster | Basal, Alternate | Simple | Entire | Long | 
| Symphyotrichum falcatum var. falcatum | Aster, Sickle; Aster, White Prairie | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane | Woodlands, Openings, Disturbed | Jul-Oct | Both | Single | Alternate | Simple | Entire | Long | 
| Symphyotrichum foliaceum var. apricum | Aster, Leafy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Montane, Subalpine, Alpine | Woodlands, Wetlands, Openings, Disturbed | Jul-Oct | Both | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Symphyotrichum foliaceum var. canbyi | Aster, Leafy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Foothills, Montane | Woodlands, Openings | Jul-Oct | Both | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Symphyotrichum foliaceum var. parryi | Aster, Leafy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Montane, Subalpine | Woodlands, Openings | Jul-Oct | Both | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Symphyotrichum lanceolatum subspecies hesperium | Aster, White Panicled | Asteraceae (aka Compositae) | Sunflower Family | Herb | White, Blue | Foothills, Montane | Wetlands, Streamsides, Openings | Jul-Oct | Both | Cluster, Single | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Symphyotrichum spathulatum var. spathulatum | Aster, Spatula; Aster, Western Mountain | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Foothills, Montane | Openings, Streamsides | Jul-Oct | Both | Mat, Single | Alternate | Simple | Entire | Long | 
| 
Synthyris alpina See: Veronica besseya  | 
Kitten Tails, Alpine; Coral Drops, Alpine | |||||||||||||
| 
Synthyris plantaginea See: Veronica plantaginea  | 
Coral Drops, White River; Kitten Tails, White River | |||||||||||||
| 
Synthyris ritteriana See: Veronica ritteriana  | 
Kitten Tails, Ritters'; Coral Drops, Ritters' | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
Talinum brevifolium See: Phemeranthus brevifolius  | 
Rockpink, Shortleaf; Fameflower, Canyonlands | |||||||||||||
| 
Talinum parviflorus See: Phemeranthus confertiflorus  | 
Rockpink, Rocky Mountain; Fameflower, Rocky Mountain | |||||||||||||
| Tamarix chinensis | Tamarisk; Saltcedar | Tamaricaceae | Tamarisk Family | Tree, Shrub | Red | Semi-Desert, Foothills | Streamsides | Apr-Aug | Alternate | Simple | Entire | Long | ||
| 
Tamarix ramosissima See: Tamarix chinensis  | 
Tamarisk; Saltcedar | |||||||||||||
| 
Tanacetum vulgare See: Leucanthemum vulgare  | 
Daisy, Ox-eye | |||||||||||||
| Taraxacum ceratophorum | Dandelion, Horned Alpine | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings | Jun-Aug | Ray | Single | Basal | Simple | Uneven | Long | 
| 
Taraxacum eriophorum See: Taraxacum ceratophorum  | 
Dandelion, Horned Alpine | |||||||||||||
| 
Taraxacum lyratum See: Taraxacum scopulorum  | 
Dandelion, Alpine | |||||||||||||
| Taraxacum officinale | Dandelion | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane, Subalpine, Alpine | Openings, Woodlands, Rocky, Disturbed, Shrublands | Mar-Nov | Ray | Single | Basal | Simple | Uneven | Long | 
| Taraxacum scopulorum | Dandelion, Alpine | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Openings | Jun-Sep | Ray | Single | Basal | Simple | Uneven | Long | 
| 
Taraxcum ovinum See: Taraxacum ceratophorum  | 
Dandelion, Horned Alpine | |||||||||||||
| Tetradymia canescens | Horsebrush, Gray | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert, Foothills, Montane | Openings, Shrublands | Jun-Sep | Disk | Cluster | Alternate | Simple | Uneven | Long | 
| Tetradymia spinosa | Horsebrush, Cat-claw | Asteraceae (aka Compositae) | Sunflower Family | Shrub, Herb | Yellow | Semi-Desert, Foothills | Openings, Shrublands | Apr-Jun | Disk | Cluster | Alternate | Simple | Entire | Long | 
| Tetraneuris acaulis var. arizonica | Woolly Base, Stemless; Daisy, Stemless Four-nerved | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings | Apr-Aug | Both | Single | Basal | Simple | Entire | Long | 
| 
Tetraneuris grandiflora See: Hymenoxys grandiflora  | 
Old Man of the Mountain | |||||||||||||
| Tetraneuris ivesiana | Perky Sue; Daisy, Ives' Four-nerved | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Woodlands, Openings | Apr-Jul | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Tetraneuris torreyana | Wooly Base, Torrey's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings | Apr-Aug | Both | Single | Basal | Simple | Entire | Long | 
| Thalictrum alpinum | Meadowrue, Alpine | Ranunculaceae | Buttercup Family | Herb | Yellow | Montane, Subalpine, Alpine | Wetlands, Rocky, Openings | Jun-Aug | Basal | Compound | Uneven | Round | ||
| Thalictrum fendleri var. fendleri | Meadowrue, Fendler's | Ranunculaceae | Buttercup Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | Jun-Sep | Basal, Alternate | Compound | Uneven | Round | ||
| Thelypodiopsis aurea | Mustard, Durango Tumble | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Yellow | Semi-Desert | Openings | Apr-Jun | Basal, Alternate | Simple | Entire, Uneven | Long | ||
| Thelypodium integrifolium | Thelypody, Entire-leaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Blue, White | Semi-Desert, Foothills | Shrublands, Openings | Jun-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Thelypodium laxiflorum | Thelypody, Loose-flowered | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | Blue, White | Foothills | Shrublands, Openings | Jul-Sep | Alternate | Simple | Entire, Uneven | Long | ||
| Thermopsis montana var. montana | Golden Banner, Mountain | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow | Foothills, Montane, Subalpine | Woodlands, Openings | May-Aug | Alternate | Compound | Uneven | Round | ||
| Thermopsis rhombifolia | Golden Banner | Fabaceae (aka Leguminosae) | Pea Family | Herb | Yellow | Semi-Desert, Foothills | Openings | Apr-Jul | Alternate | Compound | Uneven | Round | ||
| 
Thermopsis rhombifolia var. montana See: Thermopsis montana var. montana  | 
Golden Banner, Mountain | |||||||||||||
| 
Thlaspi montanum See: Noccaea fendleri ssp. glauca  | 
Candytuft, Wild; Pennycress | |||||||||||||
| Tiquilia latior | Crinklemat | Boraginaceae | Forget-Me-Not Family | Herb | Red | Semi-Desert | Openings | Apr-Aug | Alternate | Simple | Entire | Long | ||
| 
Tithymalus brachycera See: Euphorbia brachycera  | 
Spurge, Shorthorn | |||||||||||||
| Tomostima cuneifolia | Stonecress, Wedge-leaf | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Mar-May | Basal | Simple | Entire, Uneven | Round | ||
| Tomostima reptans | Whitlow Grass, Carolina; Stonecress, Carolina | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Semi-Desert | Shrublands, Woodlands, Openings | Mar-Jun | Basal, Alternate | Simple | Entire, Uneven | Round | ||
| Tonestus pygmaeus | Serpentweed, Pygmy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Subalpine, Alpine | Rocky, Openings | Jun-Aug | Both, Disk | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Torreyostellaria jamesiana | Starwort, Tuber | Caryophyllaceae | Pink Family | Herb | White | Foothills, Montane | Woodlands, Openings | May-Aug | Opposite | Simple | Entire | Long | ||
| Townsendia annua | Townsendia, Annual; Daisy, Annual Townsendia | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills | Shrublands, Openings | Apr-Nov | Both | Mat | Alternate | Simple | Entire | Long | 
| Townsendia exscapa | Townsendia, Stemless | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills, Montane | Openings, Shrublands, Woodlands | Mar-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Townsendia glabella | Townsendia, Oyster Bed | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills | Woodlands, Openings | May-Jul | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Townsendia incana | Daisy, Silvery Townsendia; Daisy, Easter | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | Feb-Oct | Both | Mat | Alternate, Basal | Simple | Entire | Long | 
| Townsendia leptotes | Townsendia, Slender-leaf | Asteraceae (aka Compositae) | Sunflower Family | Herb | White | Foothills, Montane, Subalpine, Alpine | Rocky, Openings | Apr-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| Townsendia rothrockii | Townsendia, Rothrock's | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Montane, Subalpine, Alpine | Rocky, Openings | May-Aug | Both | Mat | Basal, Alternate | Simple | Entire | Long | 
| 
Toxicodendron radicans var. rydbergii See: Toxicodendron rydbergii  | 
Poison Ivy | |||||||||||||
| Toxicodendron rydbergii | Poison Ivy | Anacardiaceae | Sumac Family | Vine, Shrub, Herb | White | Semi-Desert, Foothills, Montane | Wetlands, Streamsides | Apr-Jul | Alternate | Compound | Uneven | Long, Round | ||
| Toxicoscordion | Camas, Death | Liliaceae (See Melanthiaceae) | False Hellebore Family | Long | ||||||||||
| Toxicoscordion paniculatum | Camas, Desert Death | Melanthiaceae | False Hellebore Family | Herb | White | Semi-Desert, Foothills, Montane | Openings, Woodlands, Shrublands | Apr-Jun | Basal | Simple | Entire | Long | ||
| Toxicoscordion venenosum var. gramineum | Camas, Foothills Death | Melanthiaceae | False Hellebore Family | Herb | White | Foothills, Montane | Woodlands, Openings | Apr-Jul | Basal | Simple | Entire | Long | ||
| Tradescantia occidentalis | Spiderwort | Commelinaceae | Spiderwort Family | Herb | Blue | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | May-Jul | Alternate | Simple | Entire | Long | ||
| Tragopogon dubius | Salsify, Common; Goatsbeard, Yellow | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Disturbed | May-Sep | Ray | Single | Alternate | Simple | Entire | Long | 
| 
Tragopogon lamottei See: Tragopogon pratensis  | 
Salsify, Meadow | |||||||||||||
| Tragopogon porrifolius | Salsify, Leek-leaved | Asteraceae (aka Compositae) | Sunflower Family | Herb | Blue | Foothills, Montane | Openings, Disturbed | Apr-Jun | Ray | Single | Alternate | Simple | Entire | Long | 
| Tragopogon pratensis | Salsify, Meadow | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings, Disturbed | Jun-Sep | Ray | Single | Alternate | Simple | Entire | Long | 
| Trautvetteria caroliniensis var. occidentalis | Tasselrue | Ranunculaceae | Buttercup Family | Herb | White | Montane, Subalpine | Streamsides | Jun-Aug | Basal | Simple | Uneven | Round | ||
| Tribulus terrestris | Puncture Vine; Goathead | Zygophyllaceae | Caltrop Family | Herb | Yellow, Green | Semi-Desert, Foothills | Openings | Apr-Sep | Opposite | Compound | Uneven | Long | ||
| Trifolium attenuatum | Clover, Rocky Mountain | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Subalpine, Alpine | Openings | Jun-Aug | Alternate | Compound | Uneven | Round | ||
| Trifolium brandegeei | Clover, Brandegee's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Subalpine, Alpine | Openings | Jun-Aug | Alternate | Compound | Uneven | Round | ||
| Trifolium dasyphyllum | Clover, Hairy-leaf | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Subalpine, Alpine | Openings | Jun-Aug | Alternate | Compound | Uneven | Round | ||
| Trifolium gymnocarpon ssp. gymnocarpon | Clover, Holly Leaf | Fabaceae (aka Leguminosae) | Pea Family | Herb | White | Foothills, Montane | Woodlands, Openings | Apr-Jun | Alternate | Compound | Uneven | Round | ||
| Trifolium hybridum | Clover, Alsike | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, White | Foothills, Montane | Openings, Streamsides, Disturbed | May-Oct | Alternate | Compound | Uneven | Round | ||
| Trifolium longipes | Clover, Long-stalked | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Foothills, Montane | Openings | Apr-Jun | Alternate | Compound | Uneven | Round | ||
| Trifolium nanum | Clover, Dwarf | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, White, Yellow | Alpine | Rocky, Openings | Jun-Aug | Alternate | Compound | Uneven | Round | ||
| Trifolium parryi ssp. parryi | Clover, Parry's | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Subalpine, Alpine | Openings | Jun-Aug | Alternate | Compound | Uneven | Round | ||
| Trifolium pratense | Clover, Red | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red, Red | Foothills, Montane, Subalpine | Openings, Disturbed | Apr-Nov | Alternate | Compound | Uneven | Round | ||
| Trifolium repens | Clover, White | Fabaceae (aka Leguminosae) | Pea Family | Herb | White, Yellow | Foothills, Montane, Subalpine | Openings, Disturbed | May-Oct | Alternate | Compound | Uneven | Round | ||
| Triglochin maritima | Arrowgrass | Juncaginaceae | Arrowgrass Family | Herb | Green | Foothills, Montane | Wetlands | Jun-Aug | Basal | Simple | Entire | Long | ||
| 
Trimorpha lonchophylla See: Erigeron lonchophyllus  | 
Fleabane, Lance-leaf; Daisy, Lance-leaf; Fleabane, Short-ray | |||||||||||||
| Triteleia grandiflora | Hyacinth, Wild; Onion, Large-flowered | Asparagaceae | Asparagus Family | Herb | Blue | Foothills | Woodlands, Openings | Apr-Jun | Basal | Simple | Entire | Long | ||
| Trollius albiflorus | Globe Flower | Ranunculaceae | Buttercup Family | Herb | White | Montane, Subalpine, Alpine | Wetlands, Openings | Jun-Aug | Alternate | Simple | Uneven | Round | ||
| 
Trollius laxus ssp. albiflorus See: Trollius albiflorus  | 
Globe Flower | |||||||||||||
| 
Tryphane rubella See: Sabulina rubella  | 
Sandwort, Red | |||||||||||||
| Turritis glabra | Tower Mustard | Brassicaceae (aka Cruciferae) | Mustard Family | Herb | White | Foothills, Montane | Shrublands, Woodlands, Openings | May-Jul | Basal, Alternate | Simple | Entire | Long | ||
| Typha latifolia | Cattail | Typhaceae | Cattail Family | Herb | Yellow, Green | Semi-Desert, Foothills, Montane | Wetlands | Jun-Aug | Basal | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ulmus pumila | Elm, Siberian | Ulmaceae | Elm Family | Tree | Red, Yellow | Semi-Desert, Foothills, Montane | Disturbed, Openings | Feb-May | Alternate | Simple | Uneven | Long | ||
| Urtica dioica ssp. gracilis | Nettle, Stinging | Urticaceae | Nettle Family | Herb | White, Green | Foothills, Montane, Subalpine | Streamsides, Wetlands, Woodlands | May-Sep | Opposite | Simple | Uneven | Long | ||
| 
Urtica gracilis See: Urtica dioica ssp. gracilis  | 
Nettle, Stinging | |||||||||||||
| Utricularia macrorhiza | Bladderwort, Greater | Lentibulariaceae | Bladderwort Family | Herb | Yellow | Montane | Ponds | Jun-Sep | Alternate | Compound | Uneven | Long | ||
| Utricularia minor | Bladderwort, Lesser | Lentibulariaceae | Bladderwort Family | Herb | Yellow | Montane, Subalpine | Ponds | Jun-Sep | Alternate | Compound | Uneven | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vaccinium myrtillus | Blueberry; Whortleberry; Bilberry | Ericaceae | Heath Family | Herb | White | Montane, Subalpine | Woodlands | Jun-Jul | Alternate | Simple | Entire, Uneven | Long | ||
| Valeriana acutiloba | Valerian | Caprifoliaceae | Honeysuckle Family | Herb | White | Montane, Subalpine | Openings, Woodlands | May-Aug | Basal, Opposite | Simple, Compound | Entire, Uneven | Long | ||
| 
Valeriana capitata See: Valeriana acutiloba  | 
Valerian | |||||||||||||
| Valeriana edulis var. edulis | Valerian, Edible | Caprifoliaceae | Honeysuckle Family | Herb | White | Montane, Subalpine, Alpine | Openings, Rocky | Jun-Aug | Basal, Opposite | Simple, Compound | Entire, Uneven | Long | ||
| Valeriana occidentalis | Western Valerian | Caprifoliaceae | Honeysuckle Family | Herb | White | Montane, Subalpine | Openings, Woodlands | May-Aug | Basal, Opposite | Simple, Compound | Entire, Uneven | Long | ||
| Veratrum californicum var. californicum | Lily, Corn; Hellebore, False; Cabbage, Skunk | Melanthiaceae | False Hellebore Family | Herb | White, Green | Montane, Subalpine | Openings, Wetlands | Jun-Aug | Alternate | Simple | Entire | Long | ||
| 
Veratrum tenuipetalum See: Veratrum californicum var. californicum  | 
Lily, Corn; Hellebore, False; Cabbage, Skunk | |||||||||||||
| Verbascum thapsus | Mullein | Scrophulariaceae | Snapdragon Family | Herb | Yellow, Orange | Foothills, Montane | Disturbed, Openings | Jun-Oct | Alternate | Simple | Entire | Long | ||
| 
Verbena bipinnatifida See: Glandularia wrightii  | 
Wright's Vervain | |||||||||||||
| 
Verbena wrightii See: Glandularia wrightii  | 
Wright's Vervain | |||||||||||||
| Verbesina encelioides var. exauriculata | Crownbeard, Cowpen Daisy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Disturbed, Openings | May-Oct | Both, Disk | Single | Alternate, Opposite | Simple | Entire, Uneven | Long | 
| Veronica | Veronica | Scrophulariaceae (Also see Plantaginaceae) | Plantain Family | Long | ||||||||||
| Veronica americana | Brookline, American | Plantaginaceae | Plantain Family | Herb | Blue | Foothills, Montane | Streamsides, Wetlands | Jun-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| Veronica anagallis-aquatica | Speedwell, Water | Plantaginaceae | Plantain Family | Herb | Blue | Foothills, Montane | Streamsides, Wetlands | May-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| Veronica besseya | Kitten Tails, Alpine; Coral Drops, Alpine | Plantaginaceae | Plantain Family | Herb | Blue | Alpine | Openings, Rocky | Jun-Sep | Basal, Alternate | Simple | Uneven | Long | ||
| 
Veronica nutans See: Veronica wormskjoldii ssp. nutans  | 
Veronica; Speedwell, Western | |||||||||||||
| Veronica peregrina ssp. xalapensis | Speedwell, Purslane | Plantaginaceae | Plantain Family | Herb | White | Foothills, Montane | Wetlands, Woodlands, Openings | May-Aug | Alternate, Opposite | Simple | Entire, Uneven | Long | ||
| Veronica plantaginea | Coral Drops, White River; Kitten Tails, White River | Plantaginaceae | Plantain Family | Herb | White | Montane, Subalpine | Openings | May-Aug | Basal, Alternate | Simple | Uneven | Long | ||
| Veronica ritteriana | Kitten Tails, Ritters'; Coral Drops, Ritters' | Plantaginaceae | Plantain Family | Herb | Yellow, White | Montane, Subalpine, Alpine | Openings | May-Aug | Basal, Alternate | Simple | Uneven | Long | ||
| Veronica serpyllifolia ssp. humifusa | Speedwell, Thyme-leaf | Plantaginaceae | Plantain Family | Herb | Blue | Montane, Subalpine | Streamsides, Wetlands | May-Aug | Opposite | Simple | Entire, Uneven | Long | ||
| Veronica wormskjoldii ssp. nutans | Veronica; Speedwell, Western | Plantaginaceae | Plantain Family | Herb | Blue, White | Montane, Subalpine | Streamsides, Openings, Wetlands | Jun-Sep | Opposite | Simple | Entire, Uneven | Long | ||
| 
Veronicastrum serpyllifolium See: Veronica serpyllifolia ssp. humifusa  | 
Speedwell, Thyme-leaf | |||||||||||||
| Vesper bulbosus | Biscuitroot, Spring; Parsley, Bulbous Spring | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Red, White | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Feb-Jun | Basal, Whorled | Compound | Uneven | Long | ||
| Vesper constancei | Biscuitroot, Wide-winged; Parsley, Constance's Spring | Apiaceae (aka Umbelliferae) | Parsley Family | Herb | Red, White, Blue | Semi-Desert, Foothills | Shrublands, Woodlands, Openings | Feb-Jun | Basal, Whorled | Compound | Uneven | Long | ||
| Vicia americana | Vetch, American | Fabaceae (aka Leguminosae) | Pea Family | Herb | Red | Foothills, Montane, Subalpine | Woodlands, Openings | May-Aug | Alternate | Compound | Uneven | Long | ||
| Viola adunca | Blue Violet | Violaceae | Violet Family | Herb | Blue | Montane, Subalpine | Woodlands, Openings | May-Sep | Basal, Alternate | Simple | Entire, Uneven | Round | ||
| 
Viola adunca See: Viola adunca var. bellidifolia  | 
Alpine Blue Violet | |||||||||||||
| Viola adunca var. bellidifolia | Alpine Blue Violet | Violaceae | Violet Family | Herb | Blue | Subalpine, Alpine | Openings, Rocky | Jun-Oct | Basal, Alternate | Simple | Entire, Uneven | Round | ||
| 
Viola canadensis var. rugulosa See: Viola rugulosa  | 
Canada Violet | |||||||||||||
| 
Viola canadensis var. scopulorum See: Viola scopulorum  | 
Canada Violet | |||||||||||||
| Viola macloskeyi | Macloskey's Violet; Smooth White Violet | Violaceae | Violet Family | Herb | White | Foothills, Montane, Subalpine | Wetlands, Streamsides | May-Aug | Basal | Simple | Entire, Uneven | Round | ||
| 
Viola minuscula See: Viola macloskeyi  | 
Macloskey's Violet; Smooth White Violet | |||||||||||||
| Viola nephrophylla | Violet, Bog | Violaceae | Violet Family | Herb | Blue | Foothills, Montane | Wetlands | May-Aug | Basal | Simple | Entire, Uneven | Round | ||
| 
Viola palustris See: Viola macloskeyi  | 
Macloskey's Violet; Smooth White Violet | |||||||||||||
| Viola rugulosa | Canada Violet | Violaceae | Violet Family | Herb | White | Foothills, Montane, Subalpine | Woodlands, Openings | Apr-Sep | Basal, Alternate | Simple | Entire, Uneven | Round | ||
| 
Viola rugulosa See: Viola scopulorum  | 
Canada Violet | |||||||||||||
| 
Viola rydbergi See: Viola rugulosa  | 
Canada Violet | |||||||||||||
| 
Viola rydbergi See: Viola scopulorum  | 
Canada Violet | |||||||||||||
| Viola scopulorum | Canada Violet | Violaceae | Violet Family | Herb | White | Foothills, Montane, Subalpine | Woodlands, Openings | Apr-Sep | Basal, Alternate | Simple | Entire, Uneven | Round | ||
| 
Viola scopulorum See: Viola rugulosa  | 
Canada Violet | |||||||||||||
| 
Viola sororia See: Viola nephrophylla  | 
Violet, Bog | |||||||||||||
| Viola vallicola | Violet, Valley; Violet, Yellow | Violaceae | Violet Family | Herb | Yellow | Semi-Desert, Foothills | Openings, Shrublands, Woodlands | Apr-Jun | Basal | Simple | Entire | Round | ||
| 
Virgulus ericoides See: Symphyotrichum ericoides var. ericoides  | 
Aster, Heather | |||||||||||||
| 
Virgulus falcatus See: Symphyotrichum falcatum var. falcatum  | 
Aster, Sickle; Aster, White Prairie | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wyethia arizonica | Mule's Ears, Arizona | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Foothills, Montane | Openings | May-Jul | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| 
Wyethia scabra See: Scabrethia scabra  | 
Mule's Ears, Desert | |||||||||||||
| Wyethia ×magna | Mule's Ears | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Montane | Openings | May-Jul | Both | Single | Basal, Alternate | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Xanthisma coloradoense | Aster, Colorado Tansy | Asteraceae (aka Compositae) | Sunflower Family | Herb | Red | Montane, Subalpine, Alpine | Openings, Rocky | Jul-Sep | Both | Mat | Basal, Alternate | Simple | Entire, Uneven | Long | 
| Xanthisma grindelioides var. grindelioides | Goldenweed, Saw-toothed | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert, Foothills | Openings, Rocky | May-Jul | Disk | Mat | Alternate | Simple | Entire, Uneven | Long | 
| Xanthisma spinulosum var. paradoxum | Goldenweed, Woolly | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Openings | Mar-Sep | Both | Mat | Alternate | Simple | Entire, Uneven | Long | 
| Xanthisma spinulosum var. spinulosum | Goldenweed, Woolly | Asteraceae (aka Compositae) | Sunflower Family | Herb | Yellow | Semi-Desert | Openings | Mar-Sep | Both | Mat | Alternate | Simple | Entire, Uneven | Long | 
| 
Ximenesia encelioides See: Verbesina encelioides var. exauriculata  | 
Crownbeard, Cowpen Daisy | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yucca angustissima var. angustissima | Yucca, Narrow Leaf | Asparagaceae | Asparagus Family | Herb | White | Semi-Desert, Foothills | Shrublands, Openings | May-Jun | Basal | Simple | Entire | Long | ||
| Yucca baccata var. baccata | Yucca, Broad Leaf; Yucca, Banana | Asparagaceae | Asparagus Family | Herb | White | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | May-Jun | Basal | Simple | Entire | Long | ||
| Yucca baileyi var. baileyi | Yucca, Bailey's Narrow Leaf | Asparagaceae | Asparagus Family | Herb | White | Foothills, Montane | Woodlands, Shrublands, Openings | May-Jul | Basal | Simple | Entire | Long | ||
| Yucca harrimaniae var. harrimaniae | Yucca, Harriman's Narrow Leaf | Asparagaceae | Asparagus Family | Herb | White | Semi-Desert, Foothills | Woodlands, Shrublands, Openings | May-Jul | Basal | Simple | Entire | Long | 
| Scientific Name | Common Name | Family Name | Common Family Name | Type | Color | Zone | Habitat | Flowering Months | Asteraceae Flowerhead | Asteraceae Form | Leaf Position | Leaf Type | Leaf Margin | Leaf Shape | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
Zigadenus See: Toxicoscordion  | 
Camas, Death | |||||||||||||
| 
Zigadenus elegans See: Anticlea elegans  | 
Camas, Mountain Death | |||||||||||||
| 
Zigadenus paniculatus See: Toxicoscordion paniculatum  | 
Camas, Desert Death | |||||||||||||
| 
Zigadenus venonosus See: Toxicoscordion venenosum var. gramineum  | 
Camas, Foothills Death | |||||||||||||
| 
Zuckia brandegeei See: Grayia brandegeei  | 
Siltbush |