Southwest Colorado Wildflower Search

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Found 1025 items

	*Abies bifolia* (Fir, Subalpine) Pinaceae (Pine Family)
	*Abies concolor* (Fir, White) Pinaceae (Pine Family)
Abies lasciocarpa var. bifolia -- see -- Abies bifolia
Abies lasiocarpa -- see -- Abies bifolia
	*Abronia elliptica* (Sand Verbena) Nyctaginaceae (Four O'Clock Family)
	**Acer glabrum var. glabrum (Maple, Rocky Mountain) Sapindaceae (Soapberry Family**)
	*Acer grandidentatum* (Maple, Big Tooth) Sapindaceae (Soapberry Family)
	*Acer negundo* (Box Elder) Sapindaceae (Soapberry Family)
	*Achillea* (Yarrow) Compositae (See Asteraceae) ()
Achillea lanulosa -- see -- Achillea millefolium
	*Achillea millefolium* (Yarrow) Asteraceae (aka Compositae) (Sunflower Family)
	*Acmispon* (Pea) Leguminosae (See Fabaceae) (Pea Family)
	*Acmispon wrightii* (Vetch, Deer; Trefoil, Wright's) Fabaceae (aka Leguminosae) (Pea Family)
Acomastylis rossii -- see -- Geum rossii var. turbinatum
	**Aconitum columbianum ssp. columbianum (Monkshood) Ranunculaceae (Buttercup Family**)
Acrolasia albicaulis -- see -- Mentzelia albicaulis
	**Actaea rubra ssp. arguta (Baneberry, Red) Ranunculaceae (Buttercup Family**)
Adenolinum lewisii -- see -- Linum lewisii var. lewisii
	*Adiantum capillus-veneris* (Fern, Maidenhair) Pteridaceae (Maidenhair Fern Family)
	*Adoxa moschatellina* (Muskroot) Viburnaceae (Arrow-Wood Family)
	*Agastache* (Mint) Labiatae (See Lamiaceae) (Mint Family)
	**Agastache pallidiflora var. greenei (Hyssop, Giant) Lamiaceae (aka Labiatae) (Mint Family**)
	*Agastache urticifolia* (Hyssop, Nettleleaf Giant; Horsenettle) Lamiaceae (aka Labiatae) (Mint Family)
	*Ageratina herbacea* (Snakeroot, Fragrant) Asteraceae (aka Compositae) (Sunflower Family)
	*Agoseris aurantiaca* (Dandelion, Orange Mountain; Agoseris, Orange) Asteraceae (aka Compositae) (Sunflower Family)
	*Agoseris glauca* (Dandelion, Yellow Mountain; Agoseris, Yellow) Asteraceae (aka Compositae) (Sunflower Family)
	*Agoseris parviflora* (Agoseris, Steppe) Asteraceae (aka Compositae) (Sunflower Family)
Aletes sessiliflorus -- see -- Cymopterus sessiliflorus
	*Alhagi maurorum* (Camelthorn) Fabaceae (aka Leguminosae) (Pea Family)
	*Aliciella cliffordi* (Gilia, Clifford's) Polemoniaceae (Phlox Family)
	*Aliciella formosa* (Gilia, Beautiful) Polemoniaceae (Phlox Family)
	**Aliciella haydenii ssp. crandallii (Gilia, Crandall's) Polemoniaceae (Phlox Family**)
	**Aliciella haydenii ssp. haydenii (Gilia, Hayden's) Polemoniaceae (Phlox Family**)
	*Aliciella pinnatifida* (Gilia, Sticky) Polemoniaceae (Phlox Family)
	*Aliciella sedifolia* (Gilia, Stonecrop) Polemoniaceae (Phlox Family)
	*Aliciella subnuda* (Gilia, Carmine) Polemoniaceae (Phlox Family)
	*Allionia incarnata* (Windmills, Trailing; Four-o'clock, Trailing) Nyctaginaceae (Four O'Clock Family)
	*Allium* (Onion) Alliaceae (See Amaryllidaceae) ()
	*Allium acuminatum* (Onion, Taper-tip) Amaryllidaceae (Amaryllis Family)
	*Allium cernuum* (Onion, Nodding) Amaryllidaceae (Amaryllis Family)
	**Allium geyeri var. geyeri (Onion, Geyer's) Amaryllidaceae (Amaryllis Family**)
	**Allium geyeri var. tenerum (Onion, Geyer's) Amaryllidaceae (Amaryllis Family**)
	*Allium macropetalum* (Onion, Large-petaled; Onion, San Juan) Amaryllidaceae (Amaryllis Family)
	*Allium nevadense* (Onion, Nevada) Amaryllidaceae (Amaryllis Family)
	*Allium textile* (Onion, Textile) Amaryllidaceae (Amaryllis Family)
	*Alloberberis fremontii* (Barberry, Fremont's) Berberidaceae (Barberry Family)
	**Alnus incana ssp. tenuifolia (Alder, Thinleaf) Betulaceae (Birch Family**)
Alsinanthe macrantha -- see -- Sabulina macrantha
	*Alyssum* (Wild Alyssum) Cruciferae (See Brassicaceae) ()
Alyssum parviflorum -- see -- Alyssum simplex
	*Alyssum simplex* (Alyssum, Wild; Madwort) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Amaranthus powellii* (Amaranthus, Powell's) Amaranthaceae (Amaranth Family)
Amauriopsis dissecta -- see -- Hymenothrix dissecta
	*Ambrosia acanthicarpa* (Bursage) Asteraceae (aka Compositae) (Sunflower Family)
	*Amelanchier alnifolia* (Serviceberry; Shadbush; Saskatoon) Rosaceae (Rose Family)
	*Amelanchier utahensis* (Serviceberry, Utah) Rosaceae (Rose Family)
Amerosedum lanceolatum -- see -- Sedum lanceolatum
	*Amsonia eastwoodiana* (Bluestar, Eastwood's) Apocynaceae (Dogbane Family)
Amsonia tomentosa -- see -- Amsonia eastwoodiana
	*Anaphalis margaritacea* (Pearly Everlasting) Asteraceae (aka Compositae) (Sunflower Family)
	*Androsace septentrionalis* (Candelabra, Northern Fairy; Rock Jasmine) Primulaceae (Primrose Family)
	*Androstephium* (Lily) Liliaceae (See Asparagaceae) (Asparagus Family)
	*Androstephium* (Lily) Themidaceae (See Asparagaceae) (Asparagus Family)
	*Androstephium breviflorum* (Lily, Sand; Lily, Funnel) Asparagaceae (Asparagus Family)
	**Anemone multifida var. multifida (Windflower; Anemone, Cutleaf) Ranunculaceae (Buttercup Family**)
Anemone patens -- see -- Pulsatilla nuttalliana
	*Angelica* (Parsley) Umbelliferae (See Apiaceae) (Parsley Family)
	*Angelica ampla* (Angelica, Giant) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Angelica grayi* (Angelica, Gray's) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Angelica pinnata* (Angelica, Pinnate) Apiaceae (aka Umbelliferae) (Parsley Family)
Anotites menziesii -- see -- Silene menziesii
	*Antennaria anaphaloides* (Pearly Pussytoes) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria corymbosa* (Pussytoes, Flat-top) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria dimorpha* (Pussytoes, Cushion) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria marginata* (Pussytoes, White-margined) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria media* (Pussytoes, Rocky Mountain) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria microphylla* (Pusseytoes, Littleleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria parvifolia* (Pussytoes, Nuttall's) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria pulcherrima* (Handsome Pussytoes) Asteraceae (aka Compositae) (Sunflower Family)
Antennaria pulcherrima var. anaphaloides -- see -- Antennaria anaphaloides
	*Antennaria rosea* (Pussytoes, Red) Asteraceae (aka Compositae) (Sunflower Family)
	*Antennaria rosulata* (Pusseytoes, Kaibob) Asteraceae (aka Compositae) (Sunflower Family)
	*Anticlea elegans* (Camas, Mountain Death) Melanthiaceae (False Hellebore Family)
	*Aphyllon arizonicum* (Broomrape, Arizona) Orobanchaceae (Broomrape Family)
	*Aphyllon fasciculatum* (Broomrape, Bundled) Orobanchaceae (Broomrape Family)
	*Aphyllon uniflorum* (Broomrape, Single-flower) Orobanchaceae (Broomrape Family)
	*Apocynum androsaemifolium* (Dogbane, Spreading) Apocynaceae (Dogbane Family)
	*Apocynum cannabinum* (Dogbane; Hemp, Indian) Apocynaceae (Dogbane Family)
	**Aquilegia coerulea var. coerulea (Columbine, Colorado) Ranunculaceae (Buttercup Family**)
	**Aquilegia coerulea var. coerulea forma daileyae (Columbine, Spurless) Ranunculaceae (Buttercup Family**)
Aquilegia coerulea var. daileyae -- see -- Aquilegia coerulea var. coerulea forma daileyae
	*Aquilegia coerulea x elegantula* (Columbine, Hybrid) Ranunculaceae (Buttercup Family)
	*Aquilegia elegantula* (Columbine, Shooting Star) Ranunculaceae (Buttercup Family)
	**Aquilegia micrantha var. micrantha (Columbine, Alcove) Ranunculaceae (Buttercup Family**)
Arabis fendleri -- see -- Boechera perennans ssp. fendleri
Arabis glabra -- see -- Turritis glabra
	**Arceuthobium vaginatum ssp. cryptopodum (Mistletoe, Dwarf) Santalaceae (Sandalwood Family**)
	*Arctostaphylos patula* (Manzanita, Greenleaf) Ericaceae (Heath Family)
	*Arctostaphylos uva-ursi* (Kinnikinnick; Bearberry) Ericaceae (Heath Family)
Arenaria fendleri variety eastwoodiae -- see -- Eremogone eastwoodiae var. adenophora
	**Arenaria lanuginosa ssp. saxosa (Chickweed, Woolly; Sandwort, Spreading) Caryophyllaceae (Pink Family**)
Arenaria macrantha -- see -- Sabulina macrantha
Arenaria macrophylla -- see -- Moehringia macrophylla
Arenaria rubella -- see -- Sabulina rubella
Argemone albiflora -- see -- Argemone polyanthemos
	**Argemone corymbosa var. arenicola (Poppy, Mojave Prickly) Papaveraceae (Poppy Family**)
Argemone intermedia -- see -- Argemone polyanthemos
	*Argemone polyanthemos* (Poppy, Crested Prickly) Papaveraceae (Poppy Family)
	*Argyrochosma limitanea* (Fern, Cloak) Pteridaceae (Maidenhair Fern Family)
	*Arnica chamissonis* (Arnica, Chamisso's) Asteraceae (aka Compositae) (Sunflower Family)
	*Arnica cordifolia* (Arnica, Heartleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Arnica latifolia* (Arnica, Broadleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Arnica mollis* (Arnica, Soft) Asteraceae (aka Compositae) (Sunflower Family)
	*Arnica parryi* (Arnica, Parry's) Asteraceae (aka Compositae) (Sunflower Family)
	*Arnica rydbergii* (Arnica, Rydberg's) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia bigelovii* (Sagebrush, Bigelow's) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia borealis* (Sagewort, Northern; Sagewort, Field; Wormwood, Field) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia carruthii* (Sagewort, Carruth's; Wormwood, Carruth's) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia dracunculus* (Tarragon, Wild) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia filifolia* (Sagebrush, Sand) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia franserioides* (Sagebrush, Ragweed; Mugwort, Bursage) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia frigida* (Sagewort, Fringed; Sagebrush, Fringed; Sagewort, Prairie) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia ludoviciana* (Sagewort, Silvery; Wormwood, Louisiana) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia nova* (Sagebrush, Black) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia pygmaea* (Sage, Pygmy) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia scopulorum* (Sagewort, Alpine) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia spinescens* (Sagebrush, Spiny; Budsage) Asteraceae (aka Compositae) (Sunflower Family)
	*Artemisia tridentata subspecies tridentata* (Sagebrush, Big; Chamiso) Asteraceae (aka Compositae) (Sunflower Family)
	*Asclepias* (Milkweed) Asclepiadaceae (see Apocynaceae) (Dogbane Family)
	*Asclepias asperula* (Milkweed, Antelope-horn) Apocynaceae (Dogbane Family)
	*Asclepias cryptoceras* (Milkweed, Pallid) Apocynaceae (Dogbane Family)
	*Asclepias cutleri* (Milkweed, Cutler's) Apocynaceae (Dogbane Family)
	*Asclepias involucrata* (Milkweed, Dwarf) Apocynaceae (Dogbane Family)
	*Asclepias macrosperma* (Milkweed, Big Seed; Milkweed, Eastwood's) Apocynaceae (Dogbane Family)
	*Asclepias ruthiae* (Milkweed, Ruth's) Apocynaceae (Dogbane Family)
	*Asclepias speciosa* (Milkweed, Showy) Apocynaceae (Dogbane Family)
	*Asclepias subverticillata* (Milkweed, Horsetail; Milkweed, Whorled) Apocynaceae (Dogbane Family)
	**Asclepias tuberosa ssp. interior (Milkweed, Butterfly) Apocynaceae (Dogbane Family**)
	*Asplenium septentrionale* (Fern, Grass; Spleenwort, Forked) Aspleniaceae (Spleenwort Family)
	**Asplenium trichomanes ssp. trichomanes (Spleenwort, Maidenhair) Aspleniaceae (Spleenwort Family**)
Aster ascendens -- see -- Symphyotrichum ascendens
Aster engelmannii -- see -- Eucephalus engelmannii
Aster ericoides -- see -- Symphyotrichum ericoides var. ericoides
Aster falcatus -- see -- Symphyotrichum falcatum var. falcatum
Aster foliaceus -- see -- Symphyotrichum foliaceum var. apricum
Aster foliaceus -- see -- Symphyotrichum foliaceum var. canbyi
Aster foliaceus -- see -- Symphyotrichum foliaceum var. parryi
Aster glaucus -- see -- Herrickia glauca var. glauca
Aster lanceolatus -- see -- Symphyotrichum lanceolatum subspecies hesperium
Aster spathulatus -- see -- Symphyotrichum spathulatum var. spathulatum
	*Astragalus agrestis* (Milkvetch, Field) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus alpinus var. alpinus (Milkvetch, Alpine) Fabaceae (aka Leguminosae) (Pea Family**)
	*Astragalus amphioxys* (Milkvetch, Crescent) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus bisulcatus var. haydenianus (Milkvetch, Hayden's) Fabaceae (aka Leguminosae) (Pea Family**)
	*Astragalus calycosus* (Milkvetch, Torrey's) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus ceramicus var. ceramicus (Milkvetch, Painted) Fabaceae (aka Leguminosae) (Pea Family**)
	*Astragalus chamaeleuce* (Milkvetch, Cicada) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus cicer* (Milkvetch, Chickpea) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus coltonii var. moabensis (Milkvetch, Colton's; Milkvetch, Moab) Fabaceae (aka Leguminosae) (Pea Family**)
Astragalus cottamii -- see -- Astragalus monumentalis var. cottamii
	*Astragalus cronquistii* (Milkvetch, Cronquist's) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus desperatus* (Milkvetch, Rimrock) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus deterior* (Milkvetch, Cliff Palace) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus eastwoodiae* (Milkvetch, Eastwood's) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus flavus* (Milkvetch, Yellow) Fabaceae (aka Leguminosae) (Pea Family)
Astragalus haydenianus -- see -- Astragalus bisulcatus var. haydenianus
	*Astragalus humillimus* (Milkvetch, Mancos) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus lentiginosus var. palans (Milkvetch, Freckled) Fabaceae (aka Leguminosae) (Pea Family**)
	*Astragalus lonchocarpus* (Milkvetch, Long-pod) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus missouriensis* (Milkvetch, Missouri) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus mollissimus var. thompsoniae (Milkvetch, Woolly; Locoweed) Fabaceae (aka Leguminosae) (Pea Family**)
	**Astragalus monumentalis var. cottamii (Milkvetch, Monument Valley; Milkvetch, Cottam's) Fabaceae (aka Leguminosae) (Pea Family**)
	*Astragalus multiflorus* (Milkvetch, Multi-flowered) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus naturitensis* (Milkvetch, Naturita) Fabaceae (aka Leguminosae) (Pea Family)
	**Astragalus newberryi var. newberryi (Milkvetch, Newberry's) Fabaceae (aka Leguminosae) (Pea Family**)
	**Astragalus nuttallianus var. micranthiformis (Milkvetch, Nuttall's) Fabaceae (aka Leguminosae) (Pea Family**)
	*Astragalus pattersonii* (Milkvetch, Patterson's) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus praelongus* (Milkvetch, Stinking) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus preussii* (Milkvetch, Preuss') Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus proximus* (Milkvetch, Aztec) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus schmolliae* (Milkvetch, Schmoll's; Milkvetch, Chapin Mesa) Fabaceae (aka Leguminosae) (Pea Family)
	*Astragalus scopulorum* (Milkvetch, Rocky Mountain) Fabaceae (aka Leguminosae) (Pea Family)
Astragalus tenellus -- see -- Astragalus multiflorus
	*Astragalus wingatanus* (Milkvetch, Wingate's) Fabaceae (aka Leguminosae) (Pea Family)
Atragene occidentalis -- see -- Clematis occidentalis var. grosseserrata
	*Atriplex* (Saltbush) Chenopodiaceae (See Amaranthaceae) ()
Atriplex brandegeei -- see -- Grayia brandegeei
	**Atriplex canescens var. canescens (Saltbush, Four-Winged; Chamiso) Amaranthaceae (Amaranth Family**)
	*Atriplex confertifolia* (Shadscale) Amaranthaceae (Amaranth Family)
	*Atriplex corrugata* (Saltbush, Matted) Amaranthaceae (Amaranth Family)
	**Atriplex cuneata ssp. cuneata (Saltbush, Gardner's) Amaranthaceae (Amaranth Family**)
Atriplex gardneri var. cuneata -- see -- Atriplex cuneata ssp. cuneata
Atriplex grayi -- see -- Grayia spinosa
	*Atriplex obovata* (Saltbush, New Mexico) Amaranthaceae (Amaranth Family)
Atriplex pleiantha -- see -- Proatriplex pleiantha
	*Atriplex saccaria* (Stalked Orach) Amaranthaceae (Amaranth Family)
Aulospermum purpureum -- see -- Cymopterus purpureus

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Bahia dissecta -- see -- Hymenothrix dissecta
Bahia neomexicana -- see -- Picradeniopsis multiflora
	*Balsamorhiza sagittata* (Balsamroot, Arrowleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Barbarea vulgaris* (Rocket, Yellow) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Bassia scoparia* (Kochia, Mexican Fireweed, Burning Bush, Summer Cypress) Amaranthaceae (Amaranth Family)
Bassia sieversiana -- see -- Bassia scoparia
Batrachium aquatile -- see -- Ranunculus longirostris
Batrachium circinatum -- see -- Ranunculus longirostris
Batrachium longirostre -- see -- Ranunculus longirostris
	*Berberis fendleri* (Barberry, Fendler's) Berberidaceae (Barberry Family)
Berberis repens -- see -- Mahonia repens
Besseya alpina -- see -- Veronica besseya
Besseya plantaginea -- see -- Veronica plantaginea
Besseya ritteriana -- see -- Veronica ritteriana
Betula fontinalis -- see -- Betula occidentalis
	*Betula occidentalis* (Birch, Water) Betulaceae (Birch Family)
	*Bidens cernua* (Bur-Marigold, Nodding; Beggar-ticks, Nodding) Asteraceae (aka Compositae) (Sunflower Family)
	*Bistorta bistortoides* (Bistort, American) Polygonaceae (Buckwheat Family)
	*Bistorta vivipara* (Bistort, Alpine) Polygonaceae (Buckwheat Family)
	*Blitum nuttallianum* (Poverty Weed, Nuttall's) Amaranthaceae (Amaranth Family)
Boechera drummondii -- see -- Boechera stricta
Boechera duchesnensis -- see -- Boechera quadrangulensis
Boechera fendleri -- see -- Boechera perennans ssp. fendleri
	*Boechera formosa* (Rockcress, Beautiful) Brassicaceae (aka Cruciferae) (Mustard Family)
Boechera holboellii var. fendleri -- see -- Boechera perennans ssp. fendleri
	*Boechera lemmonii* (Rockcress, Lemmon's) Brassicaceae (aka Cruciferae) (Mustard Family)
	**Boechera perennans ssp. fendleri (Rockcress, Fendler's) Brassicaceae (aka Cruciferae) (Mustard Family**)
Boechera pulchra -- see -- Boechera formosa
Boechera pulchra var. duchesnensis -- see -- Boechera quadrangulensis
	*Boechera quadrangulensis* (Rockcress, Desert) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Boechera sp.* (Rockcress) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Boechera stricta* (Rockcress, Drummond's) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Botrychium echo* (Moonwort, Echo) Ophioglossaceae (Adder's Tongue Family)
	*Botrychium furculatum* (Moonwort, Forked) Ophioglossaceae (Adder's Tongue Family)
	*Botrychium hesperium* (Moonwort, Western) Ophioglossaceae (Adder's Tongue Family)
	*Botrychium lanceolatum* (Moonwort, Lance-leaf) Ophioglossaceae (Adder's Tongue Family)
Botrychium lunaria -- see -- Botrychium neolunaria
	*Botrychium minganense* (Moonwort, Mingan) Ophioglossaceae (Adder's Tongue Family)
	*Botrychium neolunaria* (Moonwort, New Moon) Ophioglossaceae (Adder's Tongue Family)
Botrychium neolunaria -- see -- Botrychium tunux
Botrychium pallidum -- see -- Botrychium furculatum
	*Botrychium pinnatum* (Moonwort, Pinnate) Ophioglossaceae (Adder's Tongue Family)
Botrychium redbank -- see -- Botrychium furculatum
	*Botrychium tunux* (Moosewort) Ophioglossaceae (Adder's Tongue Family)
Breea arvensis -- see -- Cirsium arvense
	*Brickellia californica* (Brickellbush, California) Asteraceae (aka Compositae) (Sunflower Family)
	*Brickellia eupatorioides* (Boneset, False) Asteraceae (aka Compositae) (Sunflower Family)
	*Brickellia grandiflora* (Brickellbush, Large-flowered; Tasselflower) Asteraceae (aka Compositae) (Sunflower Family)
	**Brickellia microphylla var. scabra (Brickellbush, Small-leaf) Asteraceae (aka Compositae) (Sunflower Family**)
	**Brickellia oblongifolia var. linifolia (Brickellbush, Narrowleaf; Brickellbush, Mojave) Asteraceae (aka Compositae) (Sunflower Family**)

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	*Calochortus* (Sego Lily) Calochortaceae (See Liliaceae) ()
	*Calochortus flexuosus* (Lily, Winding Sego; Lily, Winding Mariposa) Liliaceae (Lily Family)
	**Calochortus gunnisonii var. gunnisonii (Lily, Gunnison's Sego; Lily, Gunnison's Mariposa) Liliaceae (Lily Family**)
	*Calochortus nuttallii* (Lily, Nuttall's Sego; Lily, Nuttall's Mariposa) Liliaceae (Lily Family)
	*Caltha chionophila* (Marigold, Marsh) Ranunculaceae (Buttercup Family)
Caltha leptosepala -- see -- Caltha chionophila
Calylophus lavandulifolius -- see -- Oenothera lavandulifolia
	**Calypso bulbosa var. americana (Orchid, Fairy-Slipper; Orchid, Calypso) Orchidaceae (Orchid Family**)
	*Camelina microcarpa* (Camelina; Flax, Littlepod) Brassicaceae (aka Cruciferae) (Mustard Family)
Camissonia scapoidea ssp. scapoidea -- see -- Chylismia scapoidea ssp. scapoidea
Camissonia walkeri ssp. walkeri -- see -- Chylismia walkeri ssp. walkeri
	**Campanula parryi var. parryi (Harebells, Parry's; Bellflowers, Parry's) Campanulaceae (Bellflower Family**)
	*Campanula rotundifolia* (Harebells; Bluebells of Scotland) Campanulaceae (Bellflower Family)
	*Capsella bursa-pastoris* (Shepherd's Purse) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Cardamine cordifolia* (Bittercress, Heartleaf) Brassicaceae (aka Cruciferae) (Mustard Family)
Cardaria chalepensis -- see -- Lepidium chalepense
Cardaria draba -- see -- Lepidium chalepense
Cardaria draba -- see -- Lepidium draba
Cardaria latifolia -- see -- Lepidium latifolium
	*Carduus nutans* (Thistle, Musk; Thistle, Nodding) Asteraceae (aka Compositae) (Sunflower Family)
	*Castilleja* (Paintbrush) Scrophulariaceae (Also see Orobanchaceae Family) (Broomrape Family)
	*Castilleja chromosa* (Paintbrush, Desert) Orobanchaceae (Broomrape Family)
	*Castilleja haydenii* (Paintbrush, Hayden's) Orobanchaceae (Broomrape Family)
	*Castilleja integra* (Paintbrush, Whole-leaf) Orobanchaceae (Broomrape Family)
	*Castilleja linariifolia* (Paintbrush, Wyoming) Orobanchaceae (Broomrape Family)
	*Castilleja lineata* (Paintbrush, Lineated) Orobanchaceae (Broomrape Family)
	**Castilleja miniata var. miniata (Paintbrush, Red) Orobanchaceae (Broomrape Family**)
	*Castilleja occidentalis* (Paintbrush, Western Yellow) Orobanchaceae (Broomrape Family)
	*Castilleja rhexiifolia* (Paintbrush, Rose) Orobanchaceae (Broomrape Family)
	*Castilleja scabrida* (Paintbrush, Eastwood's) Orobanchaceae (Broomrape Family)
	*Castilleja septentrionalis* (Paintbrush, Northern Yellow) Orobanchaceae (Broomrape Family)
Castilleja sulphurea -- see -- Castilleja septentrionalis
	*Castilleja versicolor sp. nov.* (Paintbrush, Varied) Orobanchaceae (Broomrape Family)
	*Ceanothus fendleri* (Buckthorn, Fendler's; Ceanothus, Fendler's; Buckbrush, Fendler's) Rhamnaceae (Buckthorn Family)
Ceanothus franklinii -- see -- Ceanothus pauciflorus
Ceanothus greggii -- see -- Ceanothus pauciflorus
Ceanothus greggii var. franklinii -- see -- Ceanothus pauciflorus
	*Ceanothus pauciflorus* (Buckthorn, Desert; Buckbrush, Desert) Rhamnaceae (Buckthorn Family)
	*Celtis reticulata* (Hackberry) Cannabaceae (Hemp Family)
Centaurea repens -- see -- Rhaponticum repens
	**Cerastium arvense ssp. strictum (Chickweed, Mouse-ear) Caryophyllaceae (Pink Family**)
	*Cerastium beeringianum* (Chickweed, Beering's) Caryophyllaceae (Pink Family)
Cerastium strictum -- see -- Cerastium arvense ssp. strictum
Ceratocephala orthoceras -- see -- Ceratocephala testiculata
	*Ceratocephala testiculata* (Hornhead; Buttercup Bur) Ranunculaceae (Buttercup Family)
	*Cercocarpus intricatus* (Mahogany, Narrow-leaf Mountain) Rosaceae (Rose Family)
	*Cercocarpus ledifolius* (Mahogany, Curl-leaf Mountain) Rosaceae (Rose Family)
Cercocarpus ledifolius var. intricatus -- see -- Cercocarpus intricatus
	*Cercocarpus montanus* (Mahogany, Mountain) Rosaceae (Rose Family)
Chaenactis alpina -- see -- Chaenactis douglasii var. alpina
	**Chaenactis douglasii var. alpina (Chaenactis, Alpine; Dusty-Maiden, Alpine; Pincushion, Alpine) Asteraceae (aka Compositae) (Sunflower Family**)
	**Chaenactis douglasii var. douglasii (Chaenactis, Douglas'; Dusty-Maiden, Douglas'; Pincushion, Douglas') Asteraceae (aka Compositae) (Sunflower Family**)
	*Chaenactis stevioides* (Chaenactis, Esteve's; Dusty-Maiden, Esteve's; Pincushion, Esteve's) Asteraceae (aka Compositae) (Sunflower Family)
	*Chaetopappa ericoides* (Aster, Sand; Heath, Rose) Asteraceae (aka Compositae) (Sunflower Family)
	*Chamaechaenactis scaposa* (Fullstem) Asteraceae (aka Compositae) (Sunflower Family)
	**Chamaenerion angustifolium ssp. circumvagum (Fireweed) Onagraceae (Evening Primrose Family**)
	*Chamaenerion latifolium* (Fireweed, Alpine) Onagraceae (Evening Primrose Family)
Chamaesyce fendleri -- see -- Euphorbia fendleri
Chamaesyce glyptosperma -- see -- Euphorbia glyptosperma
Chamaesyce serpyllifolia -- see -- Euphorbia serpillifolia var. serpillifolia
Chamerion angustifolium -- see -- Chamaenerion angustifolium ssp. circumvagum
Chamerion danielsii -- see -- Chamaenerion angustifolium ssp. circumvagum
Chamerion latifolium -- see -- Chamaenerion latifolium
Chamerion subdentatum -- see -- Chamaenerion latifolium
Cheilanthes feei -- see -- Myriopteris gracilis
Cheilanthes limitanea -- see -- Argyrochosma limitanea
	*Chenopodium* (Goosefoot) Chenopodiaceae (See Amaranthaceae) ()
	*Chenopodium album* (Lamb's Quarters) Amaranthaceae (Amaranth Family)
	*Chenopodium atrovirens* (Goosefoot, Pinyon) Amaranthaceae (Amaranth Family)
Chenopodium desiccatum -- see -- Chenopodium pratericola
Chenopodium leptophyllum -- see -- Chenopodium pratericola
	*Chenopodium pratericola* (Goosefoot, Desert) Amaranthaceae (Amaranth Family)
	*Cherleria obtusiloba* (Sandwort, Alpine; Stitchwort, Alpine) Caryophyllaceae (Pink Family)
	*Chionophila jamesii* (Snowlover) Plantaginaceae (Plantain Family)
Chlorocrepis fendleri -- see -- Hieracium fendleri
Chlorocrepis tristis -- see -- Hieracium triste
Chondrophylla prostrata -- see -- Gentiana prostrata
	*Chorispora tenella* (Mustard, Purple) Brassicaceae (aka Cruciferae) (Mustard Family)
Chrysanthemum leucanthemum -- see -- Leucanthemum vulgare
	*Chrysothamnus depressus* (Rabbitbrush, Low) Asteraceae (aka Compositae) (Sunflower Family)
	*Chrysothamnus greenei* (Rabbitbrush, Greene's) Asteraceae (aka Compositae) (Sunflower Family)
Chrysothamnus nauseosus -- see -- Ericameria nauseosa variety graveolens
Chrysothamnus parryi -- see -- Ericameria parryi
	*Chrysothamnus viscidiflorus* (Rabbitbrush, Sticky) Asteraceae (aka Compositae) (Sunflower Family)
	**Chylismia scapoidea ssp. scapoidea (Bee Blossom, Leafless; Suncups, Leafless) Onagraceae (Evening Primrose Family**)
	**Chylismia walkeri ssp. walkeri (Bee Blossom, Walker's; Suncups, Walker's) Onagraceae (Evening Primrose Family**)
	*Cichorium intybus* (Chicory) Asteraceae (aka Compositae) (Sunflower Family)
Cicuta douglasii -- see -- Cicuta maculata
	*Cicuta maculata* (Hemlock, Water) Apiaceae (aka Umbelliferae) (Parsley Family)
Cilaria austromontana -- see -- Saxifraga austromontana
	**Cirsium arizonicum var. bipinnatum (Thistle, Arizona) Asteraceae (aka Compositae) (Sunflower Family**)
	*Cirsium arvense* (Thistle, Canada; Thistle, Creeping) Asteraceae (aka Compositae) (Sunflower Family)
Cirsium calcareum -- see -- Cirsium arizonicum var. bipinnatum
	*Cirsium clavatum var. americanum* (Thistle, Fish Lake) Asteraceae (aka Compositae) (Sunflower Family)
Cirsium coloradense -- see -- Cirsium scariosum var. coloradense
Cirsium eatoni var. hesperium -- see -- Cirsium scopulorum
	*Cirsium eatonii* (Thistle, Eaton's) Asteraceae (aka Compositae) (Sunflower Family)
Cirsium eatonii -- see -- Cirsium tukuhnikivatzicum
Cirsium eriocephalum -- see -- Cirsium scopulorum
Cirsium griseum -- see -- Cirsium clavatum var. americanum
Cirsium hesperium -- see -- Cirsium scopulorum
	*Cirsium neomexicanum* (Thistle, New Mexico) Asteraceae (aka Compositae) (Sunflower Family)
	*Cirsium parryi* (Thistle, Parry's) Asteraceae (aka Compositae) (Sunflower Family)
	**Cirsium scariosum var. coloradense (Thistle, Meadow; Thistle, Elk) Asteraceae (aka Compositae) (Sunflower Family**)
	*Cirsium scopulorum* (Thistle, Alpine) Asteraceae (aka Compositae) (Sunflower Family)
Cirsium scopulorum -- see -- Cirsium tukuhnikivatzicum
	*Cirsium tracyi* (Thistle, Tracy's) Asteraceae (aka Compositae) (Sunflower Family)
	*Cirsium tukuhnikivatzicum* (La Sal Thistle) Asteraceae (aka Compositae) (Sunflower Family)
Cirsium undulatum var. trayci -- see -- Cirsium tracyi
	*Cirsium vulgare* (Thistle, Bull) Asteraceae (aka Compositae) (Sunflower Family)
	*Claytonia* (Spring Beauty) Portulacaceae (See Montiaceae) (Miner's Lettuce Family)
	*Claytonia lanceolata* (Spring Beauty) Montiaceae (Miner's Lettuce Family)
	*Claytonia megarhiza* (Spring Beauty, Alpine) Montiaceae (Miner's Lettuce Family)
Clematis columbiana -- see -- Clematis occidentalis var. grosseserrata
	**Clematis hirsutissima var. hirsutissima (Sugarbowls) Ranunculaceae (Buttercup Family**)
	*Clematis ligusticifolia* (Clematis, Virgin's Bower) Ranunculaceae (Buttercup Family)
	**Clematis occidentalis var. grosseserrata (Clematis, Western) Ranunculaceae (Buttercup Family**)
Clementsia rhodantha -- see -- Rhodiola rhodantha
Cleome lutea -- see -- Cleomella lutea
Cleome serrulata -- see -- Cleomella serrulata
	*Cleomella* (Bee Plant) Capparaceae (See Cleomaceae) ()
	*Cleomella lutea* (Bee Plant, Yellow) Cleomaceae (Cleome Family)
	*Cleomella palmeriana* (Bee Plant, Palmer's; Stinkweed, Rocky Mountain) Cleomaceae (Cleome Family)
Cleomella palmeriana var. goodrichii -- see -- Cleomella palmeriana
	*Cleomella serrulata* (Bee Plant, Rocky Mountain) Cleomaceae (Cleome Family)
	*Clinopodium vulgare* (Basil, Wild) Lamiaceae (aka Labiatae) (Mint Family)
Coeloglossum viride -- see -- Dactylorhiza viridis
	*Coleogyne ramosissima* (Blackbrush) Rosaceae (Rose Family)
	*Collinsia parviflora* (Blue-Eyed Mary) Plantaginaceae (Plantain Family)
	*Collomia grandiflora* (Collomia, Large-flowered) Polemoniaceae (Phlox Family)
	*Collomia linearis* (Collomia, Linear-leaf) Polemoniaceae (Phlox Family)
	**Comandra umbellata ssp. pallida (Toadflax, Bastard) Santalaceae (Sandalwood Family**)
	*Comastoma tenellum* (Samiland Gentian) Gentianaceae (Gentian Family)
	*Commelina dianthifolia* (Dayflower) Commelinaceae (Spiderwort Family)
	*Conioselinum scopulorum* (Parsley, Hemlock; Lovage, Rock; Hemlock, Parsely) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Convolvulus arvensis* (Bindweed) Convolvulaceae (Morning Glory Family)
Conyza schiedeana -- see -- Laennecia schiedeana
	**Corallorhiza maculata var. maculata (Coralroot, Spotted) Orchidaceae (Orchid Family**)
	*Corallorhiza maculata yellow variety* (Coralroot, Spotted) Orchidaceae (Orchid Family)
	*Corallorhiza striata* (Coralroot, Striped) Orchidaceae (Orchid Family)
	*Corallorhiza wisteriana* (Coralroot, Wister's) Orchidaceae (Orchid Family)
	**Cordylanthus wrightii ssp. wrightii (Club Flower; Bird's Beak) Orobanchaceae (Broomrape Family**)
Coriflora hirsutissima -- see -- Clematis hirsutissima var. hirsutissima
	**Cornus alba ssp. stolonifera (Dogwood, Red-Osier) Cornaceae (Dogwood Family**)
Cornus stolonifera -- see -- Cornus alba ssp. stolonifera
	**Corydalis aurea ssp. aurea (Corydalis, Golden; Golden Smoke, Fumewort) Papaveraceae (Poppy Family**)
	**Corydalis aurea ssp. occidentalis (Corydalis, Curvepod; Fumewort) Papaveraceae (Poppy Family**)
	**Corydalis caseana ssp. brandegeei (Corydalis, Case's) Papaveraceae (Poppy Family**)
Corydalis curvisiliqua -- see -- Corydalis aurea ssp. occidentalis
Coryphantha missouriensis -- see -- Escobaria missouriensis
Coryphantha vivipara -- see -- Escobaria vivipara var. vivipara
Crataegus douglasii var. rivularis -- see -- Crataegus rivularis
	*Crataegus rivularis* (Hawthorn, River) Rosaceae (Rose Family)
	*Crataegus sp* (Hawthorn) Rosaceae (Rose Family)
	*Crepis acuminata* (Hawksbeard, Long-leaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Crepis intermedia* (Hawksbeard, Limestone) Asteraceae (aka Compositae) (Sunflower Family)
	*Crepis occidentalis* (Hawksbeard, Western) Asteraceae (aka Compositae) (Sunflower Family)
	*Crepis runcinata* (Hawksbeard, Fiddle-leaf) Asteraceae (aka Compositae) (Sunflower Family)
Cryptantha cinerea -- see -- Oreocarya suffruticosa
	**Cryptantha crassisepala var. elachantha (Cat's Eye, Thick-sepal) Boraginaceae (Forget-Me-Not Family**)
Cryptantha flava -- see -- Oreocarya flava
Cryptantha flavoculata -- see -- Oreocarya flavoculata
Cryptantha fulvocanescens -- see -- Oreocarya fulvocanescens
Cryptantha gypsophila -- see -- Oreocarya revealii
Cryptantha humilis -- see -- Oreocarya humilis
	*Cryptantha minima* (Cat's Eye, Little) Boraginaceae (Forget-Me-Not Family)
Cryptantha paradoxa -- see -- Oreocarya paradoxa
	*Cryptantha pterocarya* (Cat's Eye, Winged-nut) Boraginaceae (Forget-Me-Not Family)
Cryptantha tenuis -- see -- Oreocarya tenuis
	*Cryptogramma acrostichoides* (Rock Brake) Pteridaceae (Maidenhair Fern Family)
	*Cryptogramma stelleri* (Rock Brake, Steller's) Pteridaceae (Maidenhair Fern Family)
	*Cylindropuntia imbricata* (Cholla, Cane; Cholla, Tree) Cactaceae (Cactus Family)
	**Cylindropuntia whipplei var. whipplei (Cholla, Whipple's) Cactaceae (Cactus Family**)
Cymopterus acaulis var. fendleri -- see -- Cymopterus glomeratus var. fendleri
Cymopterus breviradiatus -- see -- Cymopterus sessiliflorus
Cymopterus bulbosus -- see -- Vesper bulbosus
Cymopterus constancei -- see -- Vesper constancei
Cymopterus fendleri -- see -- Cymopterus glomeratus var. fendleri
	**Cymopterus glomeratus var. fendleri (Biscuitroot, Fendler's; Parsley, Fendler's Spring) Apiaceae (aka Umbelliferae) (Parsley Family**)
	*Cymopterus lemmonii* (Parsley, Mountain; Parsley, Lemmon's) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Cymopterus newberryi* (Biscuitroot, Newberry's; Parsley, Newberry's Spring) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Cymopterus purpureus* (Biscuitroot, Purple; Parsley, Purple Spring) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Cymopterus sessiliflorus* (Biscuitroot, Sessile-flower) Apiaceae (aka Umbelliferae) (Parsley Family)
	**Cymopterus terebinthinus var. albiflorus (Biscuitroot, Turpentine; Parsley, Rock Spring) Apiaceae (aka Umbelliferae) (Parsley Family**)
	*Cynoglossum officinale* (Hound's Tongue) Boraginaceae (Forget-Me-Not Family)
Cypripedium calceolus -- see -- Cypripedium parviflorum var. pubescens
	**Cypripedium parviflorum var. pubescens (Orchid, Lady's Slipper) Orchidaceae (Orchid Family**)
Cyrtorhyncha cymbalaria -- see -- Halerpestus cymbalaria
	*Cystopteris fragilis* (Fern, Brittle) Cystopteridaceae (Wood Fern Family)
	*Cystopteris reevesiana* (Fern, Reeves' Brittle; Fern, Reeves' Brittle Bladder) Cystopteridaceae (Wood Fern Family)

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	*Dactylorhiza viridis* (Orchid, Long-bracted) Orchidaceae (Orchid Family)
	**Dalea candida var. oligophylla (Clover, Western Prairie; Dalea, Silvery) Fabaceae (aka Leguminosae) (Pea Family**)
Dalea occidentalis -- see -- Dalea candida var. oligophylla
	**Dasiphora fruticosa ssp. floribunda (Cinquefoil, Shrubby) Rosaceae (Rose Family**)
	*Datura wrightii* (Datura, Sacred; Jimsonweed; Indianapple) Solanaceae (Nightshade Family)
Delphinium andersonii -- see -- Delphinium scaposum var. scaposum
	*Delphinium barbeyi* (Larkspur, Subalpine; Larkspur, Barbey's) Ranunculaceae (Buttercup Family)
Delphinium nelsonii -- see -- Delphinium nuttallianum
	*Delphinium nuttallianum* (Larkspur, Dwarf; Larkspur, Nuttall's) Ranunculaceae (Buttercup Family)
	*Delphinium robustum* (Larkspur, Robust) Ranunculaceae (Buttercup Family)
	**Delphinium scaposum var. scaposum (Larkspur, Desert; Larkspur, Bare-stem; Larkspur, Tall Mountain) Ranunculaceae (Buttercup Family**)
	*Descurainia incana* (Tansy Mustard) Brassicaceae (aka Cruciferae) (Mustard Family)
Descurainia incana var. incisa -- see -- Descurainia incisa
	*Descurainia incisa* (Tansy Mustard) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Descurainia obtusa* (Tansy Mustard) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Descurainia sophia* (Flixweed) Brassicaceae (aka Cruciferae) (Mustard Family)
	**Dieteria bigelovii var. bigelovii (Aster, Bigelow's Tansy) Asteraceae (aka Compositae) (Sunflower Family**)
	*Dieteria canescens* (Aster, Gray Tansy) Asteraceae (aka Compositae) (Sunflower Family)
	*Dimorphocarpa wislizeni* (Spectacle Pod) Brassicaceae (aka Cruciferae) (Mustard Family)
Disporum trachycarpum -- see -- Prosartes trachycarpa
Distegia involucrata -- see -- Lonicera involucrata
Dithyrea wislizeni -- see -- Dimorphocarpa wislizeni
Dodecatheon pulchellum -- see -- Primula pauciflora
	*Draba aurea* (Draba, Golden) Brassicaceae (aka Cruciferae) (Mustard Family)
Draba breweri -- see -- Draba cana
	*Draba cana* (Draba, Brewer's; Whitlow Grass, Hoary) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Draba crassa* (Draba, Thick-leaf) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Draba crassifolia* (Draba, Snowbed) Brassicaceae (aka Cruciferae) (Mustard Family)
Draba cuneifolia -- see -- Tomostima cuneifolia
	**Draba fladnizensis var. pattersonii (Draba, Fladnitz; Draba, Austrian) Brassicaceae (aka Cruciferae) (Mustard Family**)
	*Draba graminea* (Draba, Grass-like; Whitlow Grass, Rocky Mountain) Brassicaceae (aka Cruciferae) (Mustard Family)
Draba reptans -- see -- Tomostima reptans
	*Draba spectabilis* (Draba, Showy) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Draba streptobrachia* (Draba, Twisted; Whitlow Grass, Alpine) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Dracocephalum parviflorum* (Dragonhead) Lamiaceae (aka Labiatae) (Mint Family)
Drymocallis arguta -- see -- Drymocallis convallaria
	*Drymocallis convallaria* (Woodbeauty, Cream) Rosaceae (Rose Family)
	**Dryopteris filix-mas ssp. filix-mas (Fern, Male) Dryopteridaceae (Wood Fern Family**)
Dugaldia hoopesii -- see -- Hymenoxys hoopesii

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	**Echinocereus fendleri var. fendleri (Cactus, Fendler's Hedgehog) Cactaceae (Cactus Family**)
	*Echinocereus mojavensis* (Cactus, Claret Cup; Cactus, Hedgehog; Cactus, Kingcup) Cactaceae (Cactus Family)
Echinocereus triglochidiatus var. mojavensis -- see -- Echinocereus mojavensis
	*Elaeagnus angustifolia* (Olive, Russian) Elaeagnaceae (Oleaster Family)
Encelia frutescens -- see -- Encelia resinifera
	*Encelia resinifera* (Brittlebush, Sticky) Asteraceae (aka Compositae) (Sunflower Family)
	*Enceliopsis nudicaulis* (Nakedstem Sunray) Asteraceae (aka Compositae) (Sunflower Family)
Endotropis smithii -- see -- Rhamnus smithii
	*Ephedra cutleri* (Mormon Tea, Cutler's; Joint-fir, Cutler's) Ephedraceae (Ephedra Family)
	*Ephedra torreyana* (Mormon Tea, Torrey's; Joint-fir, Torrey's) Ephedraceae (Ephedra Family)
	*Ephedra viridis* (Mormon Tea, Green; Joint-fir, Green) Ephedraceae (Ephedra Family)
Ephedra viridis var. viscida -- see -- Ephedra cutleri
Epilobium alpinum -- see -- Epilobium anagallidifolium
	*Epilobium anagallidifolium* (Willowherb, Alpine) Onagraceae (Evening Primrose Family)
	*Epilobium brachycarpum* (Willowherb, Short Fruit) Onagraceae (Evening Primrose Family)
	*Epilobium ciliatum* (Willowherb, Fringed) Onagraceae (Evening Primrose Family)
	**Epilobium hornemannii ssp. hornemannii (Willowherb, Hornemann's) Onagraceae (Evening Primrose Family**)
Epilobium paniculatum -- see -- Epilobium brachycarpum
	*Epipactis gigantea* (Helleborine, Giant) Orchidaceae (Orchid Family)
	*Equisetum arvense* (Horsetails, Field) Equisetaceae (Horsetail Family)
Equisetum hyemale -- see -- Equisetum praealtum
	*Equisetum laevigatum* (Rush, Smooth Scouring) Equisetaceae (Horsetail Family)
	*Equisetum praealtum* (Rush, Scouring) Equisetaceae (Horsetail Family)
	*Eremocrinum* (Lily) Agavaceae (See Asparagaceae) (Asparagus Family)
	*Eremocrinum albomarginatum* (Lily, Sand) Asparagaceae (Asparagus Family)
	**Eremogone congesta var. congesta (Sandwort, Ball Head) Caryophyllaceae (Pink Family**)
	**Eremogone eastwoodiae var. adenophora (Sandwort, Eastwood's) Caryophyllaceae (Pink Family**)
	*Eremogone fendleri* (Sandwort, Fendler's) Caryophyllaceae (Pink Family)
Eremogone kingii -- see -- Eremogone eastwoodiae var. adenophora
	*Eriastrum sparsiflorum* (Starflower, Sparse) Polemoniaceae (Phlox Family)
	*Ericameria nauseosa variety graveolens* (Rabbitbrush; Rabbitbrush, Rubber; Rabbitbrush, Golden; Chamisa) Asteraceae (aka Compositae) (Sunflower Family)
	*Ericameria parryi* (Rabbitbrush, Parry's) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron abajoensis* (Fleabane, Abajo; Daisy, Abajo) Asteraceae (aka Compositae) (Sunflower Family)
	**Erigeron aphanactis var. aphanactis (Fleabane, Rayless; Daisy, Rayless) Asteraceae (aka Compositae) (Sunflower Family**)
	*Erigeron argentatus* (Fleabane, Silvery; Daisy, Silvery) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron bellidiastrum* (Fleabane, Pretty; Daisy, Pretty) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron canus* (Fleabane, Gray; Daisy, Gray; Fleabane, Hoary) Asteraceae (aka Compositae) (Sunflower Family)
Erigeron colomexicanus -- see -- Erigeron tracyi
	*Erigeron compositus* (Fleabane, Composite; Daisy, Composite; Daisy, Cutleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron concinnus* (Fleabane, Hairy; Daisy, Hairy; Fleabane, Navajo) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron coulteri* (Fleabane, Coulter's; Daisy, Coulter's) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron divergens* (Fleabane, Spreading; Daisy, Spreading) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron eatonii* (Daisy, Eaton's; Fleabane, Eaton's) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron elatior* (Fleabane, Tall; Daisy, Tall) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron eximius* (Fleabane, Splendid; Daisy, Splendid) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron flagellaris* (Fleabane, Whiplash; Daisy, Whiplash; Fleabane, Trailing) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron formosissimus* (Fleabane, Beautiful; Daisy, Beautiful) Asteraceae (aka Compositae) (Sunflower Family)
	**Erigeron glacialis var. glacialis (Fleabane, Glacier; Daisy, Glacier) Asteraceae (aka Compositae) (Sunflower Family**)
	*Erigeron grandiflorus* (Daisy, Rocky Mountain Alpine; Daisy, Large-flowered) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron leiomerus* (Fleabane, Rockslide; Daisy, Rockslide) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron lonchophyllus* (Fleabane, Lance-leaf; Daisy, Lance-leaf; Fleabane, Short-ray) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron melanocephalus* (Fleabane, Blackheaded; Daisy, Blackheaded) Asteraceae (aka Compositae) (Sunflower Family)
Erigeron peregrinus -- see -- Erigeron glacialis var. glacialis
	*Erigeron pinnatisectus* (Fleabane, Cutleaf; Fleabane, Featherleaf; Daisy, Cutleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron pulcherrimus* (Fleabane, Beautiful; Daisy, Beautiful; Daisy, Basin) Asteraceae (aka Compositae) (Sunflower Family)
Erigeron pumilus -- see -- Erigeron concinnus
	*Erigeron sivinskii* (Fleabane, Sivinski's; Daisy, Sivinski's) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron speciosus* (Fleabane, Showy; Daisy, Showy; Daisy, Aspen) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron subtrinervis* (Fleabane, Three-nerved; Daisy, Three-nerved) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron tracyi* (Fleabane, Tracy's; Daisy, Tracy's) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron ursinus* (Fleabane, Bear River; Daisy, Bear River) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron utahensis* (Fleabane, Utah; Daisy, Utah) Asteraceae (aka Compositae) (Sunflower Family)
	*Erigeron vetensis* (Fleabane, Early Bluetop; Daisy, Early Bluetop) Asteraceae (aka Compositae) (Sunflower Family)
	*Eriogonum alatum* (Buckwheat, Winged) Polygonaceae (Buckwheat Family)
	**Eriogonum arcuatum var. arcuatum (Buckwheat, Curved) Polygonaceae (Buckwheat Family**)
	*Eriogonum cernuum* (Buckwheat, Nodding) Polygonaceae (Buckwheat Family)
	**Eriogonum corymbosum var. orbiculatum (Buckwheat, Fremont's Rimrock) Polygonaceae (Buckwheat Family**)
	**Eriogonum corymbosum var. velutinum (Buckwheat, Fremont's Velvet) Polygonaceae (Buckwheat Family**)
Eriogonum flexum -- see -- Stenogonum flexum
	*Eriogonum hookeri* (Buckwheat, Hooker's) Polygonaceae (Buckwheat Family)
	*Eriogonum inflatum* (Trumpets, Desert) Polygonaceae (Buckwheat Family)
	*Eriogonum jamesii* (Buckwheat, James') Polygonaceae (Buckwheat Family)
	*Eriogonum leptocladon* (Buckwheat, Eastwood's) Polygonaceae (Buckwheat Family)
	*Eriogonum leptophyllum* (Buckwheat, Slenderleaf) Polygonaceae (Buckwheat Family)
	*Eriogonum lonchophyllum* (Buckwheat, Lanceleaf) Polygonaceae (Buckwheat Family)
	*Eriogonum microthecum* (Buckwheat, Slender) Polygonaceae (Buckwheat Family)
	*Eriogonum ovalifolium* (Buckwheat, Cushion) Polygonaceae (Buckwheat Family)
	*Eriogonum palmerianum* (Buckwheat, Palmer's) Polygonaceae (Buckwheat Family)
	*Eriogonum racemosum* (Buckwheat, Red Root) Polygonaceae (Buckwheat Family)
Eriogonum salsuginosum -- see -- Stenogonum salsuginosum
	*Eriogonum subalpinum* (Buckwheat, Subalpine) Polygonaceae (Buckwheat Family)
	*Eriogonum umbellatum* (Sulfur Flower) Polygonaceae (Buckwheat Family)
Eriogonum umbellatum var. majus -- see -- Eriogonum subalpinum
	*Erodium cicutarium* (Filaree; Storksbill) Geraniaceae (Geranium Family)
	*Erysimum capitatum* (Wallflower, Western) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Erythranthe eastwoodiae* (Monkeyflower, Eastwood's) Phrymaceae (Lopseed Family)
	*Erythranthe guttata* (Monkeyflower, Yellow) Phrymaceae (Lopseed Family)
Erythranthe minor -- see -- Erythranthe guttata
	*Erythranthe rubella* (Monkey Flower, Red Stem) Phrymaceae (Lopseed Family)
	*Erythranthe suksdorfii* (Monkey Flower, Suksdorf's) Phrymaceae (Lopseed Family)
	*Erythranthe tilingii* (Monkey Flower, Tiling's; Monkeyflower, Subalpine) Phrymaceae (Lopseed Family)
Erythrocoma triflora -- see -- Geum triflorum
	*Erythronium grandiflorum* (Lily, Glacier; Violet, Dogtooth) Liliaceae (Lily Family)
	*Escobaria missouriensis* (Cactus, Missouri Pincushion) Cactaceae (Cactus Family)
	**Escobaria vivipara var. vivipara (Cactus, Pincushion; Spinystar) Cactaceae (Cactus Family**)
	*Eucephalus engelmannii* (Aster, Engelmann's) Asteraceae (aka Compositae) (Sunflower Family)
Eucephalus glaucus -- see -- Herrickia glauca var. glauca
	*Euphorbia brachycera* (Spurge, Shorthorn) Euphorbiaceae (Spurge Family)
	*Euphorbia fendleri* (Spurge, Fendler's; Sandmat, Fendler's) Euphorbiaceae (Spurge Family)
	*Euphorbia glyptosperma* (Spurge, Carved Seed) Euphorbiaceae (Spurge Family)
	**Euphorbia serpillifolia var. serpillifolia (Spurge, Thyme-leaf) Euphorbiaceae (Spurge Family**)
	*Euphrosyne acerosa* (Copperweed) Asteraceae (aka Compositae) (Sunflower Family)
Eurybia glauca -- see -- Herrickia glauca var. glauca

|
---F---
|

	*Fallugia paradoxa* (Apache Plume) Rosaceae (Rose Family)
	*Fendlera rupicola* (Fendlerbush; Cliff Fendlerbush) Hydrangeaceae (Hydrangea Family)
	*Forestiera pubescens* (Olive, Desert; Privet, New Mexico; Coyote Bush) Oleaceae (Olive Family)
Forsellesia meionandra -- see -- Glossopetalon spinescens var. meionandrum
	**Fragaria vesca ssp. bracteata (Strawberry, Little) Rosaceae (Rose Family**)
	**Fragaria virginiana ssp. glauca (Strawberry, Virginia) Rosaceae (Rose Family**)
Frangula betulifolia ssp. obovata -- see -- Frangula obovata
	*Frangula obovata* (Buckthorn, Pearleaf) Rhamnaceae (Buckthorn Family)
	*Frankenia jamesii* (Frankenia; Seaheath) Frankeniaceae (Frankenia Family)
	*Frasera albomarginata* (Frasera, White-margined) Gentianaceae (Gentian Family)
	*Frasera paniculata* (Frasera, Utah; Swertia, Utah) Gentianaceae (Gentian Family)
	*Frasera speciosa* (Monument Plant; Elkweed; Gentian, Green) Gentianaceae (Gentian Family)
Frasera utahensis -- see -- Frasera paniculata
	**Fraxinus anomala var. anomala (Ash, Single Leaf) Oleaceae (Olive Family**)
	*Fritillaria atropurpurea* (Lily, Chocolate) Liliaceae (Lily Family)

|
---G---
|

	*Gaillardia aristata* (Blanketflower) Asteraceae (aka Compositae) (Sunflower Family)
	*Gaillardia pinnatifida* (Blanketflower, Cut-leaf; Blanketflower, Hopi) Asteraceae (aka Compositae) (Sunflower Family)
	*Galium boreale* (Bedstraw, Northern) Rubiaceae (Madder Family)
	*Galium coloradoense* (Bedstraw, Colorado; Bedstraw, Shrubby) Rubiaceae (Madder Family)
Galium multiflorum var. coloradoense -- see -- Galium coloradoense
Galium septentrionale -- see -- Galium boreale
	*Galium triflorum* (Bedstraw, Fragrant) Rubiaceae (Madder Family)
Gastrolychnis drummondii -- see -- Silene drummondii
Gaura mollis -- see -- Oenothera curtiflora
Gaura parviflora -- see -- Oenothera curtiflora
	**Gayophytum diffusum ssp. parviflorum (Groundsmoke, Spreading) Onagraceae (Evening Primrose Family**)
	*Gentiana affinis* (Gentian, Bottle; Gentian, Rocky Mountain) Gentianaceae (Gentian Family)
	*Gentiana algida* (Gentian, Arctic) Gentianaceae (Gentian Family)
Gentiana barbellata -- see -- Gentianopsis barbellata
	*Gentiana parryi* (Gentian, Parry's; Gentian, Bottle) Gentianaceae (Gentian Family)
	*Gentiana prostrata* (Gentian, Siberian; Gentian, Moss; Gentian, Pygmy) Gentianaceae (Gentian Family)
Gentiana thermalis -- see -- Gentianopsis thermalis
Gentianella acuta -- see -- Gentianella amarella ssp. acuta
	**Gentianella amarella ssp. acuta (Gentian, Little; Felwort) Gentianaceae (Gentian Family**)
	**Gentianella amarella ssp. heterosepala (Gentian, Little; Felwort) Gentianaceae (Gentian Family**)
Gentianella heterosepala -- see -- Gentianella amarella ssp. heterosepala
Gentianella tenella -- see -- Comastoma tenellum
Gentianodes algida -- see -- Gentiana algida
	*Gentianopsis barbellata* (Gentian, Little Fringed) Gentianaceae (Gentian Family)
Gentianopsis detonsa -- see -- Gentianopsis thermalis
	*Gentianopsis thermalis* (Gentian, Fringed) Gentianaceae (Gentian Family)
	*Geranium caespitosum* (Geranium, Purple; Cranesbill, Purple) Geraniaceae (Geranium Family)
	*Geranium richardsonii* (Geranium, White; Cranesbill, White) Geraniaceae (Geranium Family)
	*Geranium viscosissimum* (Geranium, Sticky; Cranesbill, Sticky) Geraniaceae (Geranium Family)
	*Geum aleppicum* (Avens, Yellow) Rosaceae (Rose Family)
	*Geum macrophyllum* (Avens, Large Leaf) Rosaceae (Rose Family)
	**Geum rossii var. turbinatum (Avens, Alpine) Rosaceae (Rose Family**)
	*Geum triflorum* (Prairie Smoke; Old-Man's-Whiskers) Rosaceae (Rose Family)
Gilia aggregata -- see -- Ipomopsis aggregata
Gilia arizonica -- see -- Ipomopsis arizonica
Gilia clokeyi -- see -- Gilia ophthalmoides
Gilia congesta. -- see -- Ipomopsis congesta ssp. matthewii
Gilia formosa -- see -- Aliciella formosa
Gilia gunnisonii -- see -- Ipomopsis gunnisonii
Gilia haydenii -- see -- Aliciella haydenii ssp. crandallii
Gilia haydenii -- see -- Aliciella haydenii ssp. haydenii
Gilia inconspicua -- see -- Gilia ophthalmoides
Gilia longiflora -- see -- Ipomopsis longiflora
	*Gilia ophthalmoides* (Gilia, Eyed) Polemoniaceae (Phlox Family)
Gilia ophthalmoides subspecies clokeyi -- see -- Gilia ophthalmoides
Gilia pinnatifida -- see -- Aliciella pinnatifida
Gilia polycladon -- see -- Ipomopsis polycladon
Gilia pumila -- see -- Ipomopsis pumila
Gilia roseata -- see -- Ipomopsis roseata
Gilia sinistra -- see -- Navarretia sinistra
Gilia subnuda -- see -- Aliciella subnuda
Gilia tenuituba -- see -- Ipomopsis tenuituba
Glandularia bipinnatifida -- see -- Glandularia wrightii
	*Glandularia wrightii* (Wright's Vervain) Verbenaceae (Verbena Family)
	**Glossopetalon spinescens var. meionandrum (Greasebush) Crossosomataceae (Crossosoma Family**)
	*Glycyrrhiza lepidota* (Licorice, Wild) Fabaceae (aka Leguminosae) (Pea Family)
	*Goodyera oblongifolia* (Orchid, Rattlesnake Plantain) Orchidaceae (Orchid Family)
	*Goodyera repens* (Orchid, Dwarf Rattlesnake Plantain) Orchidaceae (Orchid Family)
	*Grayia brandegeei* (Siltbush) Amaranthaceae (Amaranth Family)
	*Grayia spinosa* (Hopsage, Spiny) Amaranthaceae (Amaranth Family)
Grindelia aphanactis -- see -- Grindelia nuda
	*Grindelia arizonica* (Gumweed, Arizona) Asteraceae (aka Compositae) (Sunflower Family)
Grindelia fastigiata -- see -- Grindelia hirsutula
	*Grindelia hirsutula* (Gumweed, Hairy) Asteraceae (aka Compositae) (Sunflower Family)
	*Grindelia nuda* (Gumweed, Rayless) Asteraceae (aka Compositae) (Sunflower Family)
	*Grindelia squarrosa* (Gumweed, Curly) Asteraceae (aka Compositae) (Sunflower Family)
Grindelia squarrosa -- see -- Grindelia nuda
	*Gutierrezia elegans* (Snakeweed, Lone Mesa) Asteraceae (aka Compositae) (Sunflower Family)
	*Gutierrezia microcephala* (Snakeweed, Small Head) Asteraceae (aka Compositae) (Sunflower Family)
	*Gutierrezia sarothrae* (Snakeweed, Broom) Asteraceae (aka Compositae) (Sunflower Family)

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---H---
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H. discolor var. dumosus -- see -- Holodiscus dumosus
Habenaria huronensis -- see -- Platanthera huronensis
Habenaria hyperborea -- see -- Platanthera aquilonis
Habenaria hyperborea -- see -- Platanthera huronensis
Habenaria viridis -- see -- Dactylorhiza viridis
	*Hackelia floribunda* (Stickseed, Many-flowered) Boraginaceae (Forget-Me-Not Family)
	*Halerpestus cymbalaria* (Buttercup, Alkali; Buttercup, Marsh) Ranunculaceae (Buttercup Family)
	*Halogeton glomeratus* (Saltlover) Amaranthaceae (Amaranth Family)
Haplopappus lanceolatus -- see -- Pyrrocoma uniflora var. uniflora
Haplopappus spinulosus -- see -- Xanthisma spinulosum var. paradoxum
Haplopappus spinulosus -- see -- Xanthisma spinulosum var. spinulosum
Haplopappus uniflorus -- see -- Pyrrocoma uniflora var. uniflora
	*Hedeoma drummondii* (Pennyroyal, Drummond's) Lamiaceae (aka Labiatae) (Mint Family)
	**Hedysarum boreale var. boreale (Chainpod, Northern; Sweetvetch, Utah) Fabaceae (aka Leguminosae) (Pea Family**)
	**Hedysarum occidentale var. occidentale (Chainpod, Western; Sweetvetch, Western) Fabaceae (aka Leguminosae) (Pea Family**)
	*Helianthella microcephala* (Sunflower, Small Head) Asteraceae (aka Compositae) (Sunflower Family)
	*Helianthella parryi* (Sunflower, Parry's) Asteraceae (aka Compositae) (Sunflower Family)
	*Helianthella quinquenervis* (Sunflower, Five-nerved; Sunflower, Little) Asteraceae (aka Compositae) (Sunflower Family)
	*Helianthus annuus* (Sunflower, Common) Asteraceae (aka Compositae) (Sunflower Family)
	**Helianthus pauciflorus ssp. subrhomboideus (Sunflower, Stiff) Asteraceae (aka Compositae) (Sunflower Family**)
	*Helianthus petiolaris* (Sunflower, Prairie) Asteraceae (aka Compositae) (Sunflower Family)
Helianthus rigidus -- see -- Helianthus pauciflorus ssp. subrhomboideus
	**Heliomeris multiflora var. multiflora (Goldeneye, Showy) Asteraceae (aka Compositae) (Sunflower Family**)
	*Heracleum maximum* (Parsnip, Cow) Apiaceae (aka Umbelliferae) (Parsley Family)
Heracleum sphondylium -- see -- Heracleum maximum
	**Herrickia glauca var. glauca (Aster, Waxy; Aster, Gray) Asteraceae (aka Compositae) (Sunflower Family**)
Heterotheca pumila -- see -- Heterotheca schneideri
	*Heterotheca schneideri* (Aster, Schneider's Golden) Asteraceae (aka Compositae) (Sunflower Family)
	*Heterotheca villosa* (Aster, Hairy Golden) Asteraceae (aka Compositae) (Sunflower Family)
	*Heterotheca zionensis* (Aster, Zion Golden) Asteraceae (aka Compositae) (Sunflower Family)
	*Heuchera parvifolia* (Alumroot, Littleleaf) Saxifragaceae (Saxifrage Family)
Hieracium aurantiacum -- see -- Pilosella aurantiaca
	*Hieracium fendleri* (Hawkweed, Fendler's) Asteraceae (aka Compositae) (Sunflower Family)
	*Hieracium triste* (Hawkweed, Woolly) Asteraceae (aka Compositae) (Sunflower Family)
Hippochaete hyemalis -- see -- Equisetum praealtum
	*Hippuris vulgaris* (Mare's Tail) Plantaginaceae (Plantain Family)
Hirculus platysepalus -- see -- Saxifraga flagellaris ssp. crandallii
Hirculus serpyllifolius ssp. chrysanthus -- see -- Saxifraga chrysantha
Holodiscus discolor -- see -- Holodiscus dumosus
	*Holodiscus dumosus* (Mountain Spray; Spirea, Rock) Rosaceae (Rose Family)
	**Hydrophyllum fendleri var. fendleri (Waterleaf, Fendler's) Hydrophyllaceae (Waterleaf Family**)
	*Hymenopappus filifolius* (Sunflower, Threadleaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Hymenopappus newberryi* (Cosmos, Wild) Asteraceae (aka Compositae) (Sunflower Family)
	*Hymenothrix dissecta* (Bahia) Asteraceae (aka Compositae) (Sunflower Family)
	*Hymenoxys grandiflora* (Old Man of the Mountain) Asteraceae (aka Compositae) (Sunflower Family)
	*Hymenoxys hoopesii* (Sneezeweed, Orange) Asteraceae (aka Compositae) (Sunflower Family)
	*Hymenoxys richardsonii* (Rubberplant, Colorado) Asteraceae (aka Compositae) (Sunflower Family)
Hypericum formosum -- see -- Hypericum scouleri
	*Hypericum scouleri* (St. Johnswort) Hypericaceae (St. Johnswort Family)

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---I---
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	*Iliamna angulata* (Hollyhock, Wild) Malvaceae (Mallow Family)
Iliamna grandiflora -- see -- Iliamna angulata
	*Ipomopsis aggregata* (Gilia, Scarlet) Polemoniaceae (Phlox Family)
Ipomopsis aggregata var. arizonica -- see -- Ipomopsis arizonica
Ipomopsis aggregata variety macrosiphon -- see -- Ipomopsis tenuituba
	*Ipomopsis arizonica* (Skyrocket, Arizona) Polemoniaceae (Phlox Family)
	**Ipomopsis congesta ssp. matthewii (Skyrocket, Ball-head) Polemoniaceae (Phlox Family**)
	*Ipomopsis gunnisonii* (Skyrocket, Gunnison's) Polemoniaceae (Phlox Family)
	*Ipomopsis longiflora* (Skyrocket, Long-flowered) Polemoniaceae (Phlox Family)
	*Ipomopsis polyantha* (Skyrocket, Pagosa) Polemoniaceae (Phlox Family)
	*Ipomopsis polycladon* (Skyrocket, Spreading) Polemoniaceae (Phlox Family)
	*Ipomopsis pumila* (Skyrocket, Dwarf) Polemoniaceae (Phlox Family)
	*Ipomopsis ramosa* (Ipomopsis, Coral) Polemoniaceae (Phlox Family)
	*Ipomopsis roseata* (Skyrocket, Rosy) Polemoniaceae (Phlox Family)
	*Ipomopsis tenuituba* (Skyrocket, Slender-tube) Polemoniaceae (Phlox Family)
	*Iris missouriensis* (Iris, Wild) Iridaceae (Iris Family)
	*Isocoma pluriflora* (Jimmyweed, Many-flowered; Goldenbush, Many-flowered) Asteraceae (aka Compositae) (Sunflower Family)
	*Isocoma rusbyi* (Jimmyweed, Rusby's; Goldenbush, Rusby's) Asteraceae (aka Compositae) (Sunflower Family)
	**Ivesia gordonii var. gordonii (Ivesia) Rosaceae (Rose Family**)

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---J---
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	*Juniperus communis* (Juniper, Common) Cupressaceae (Cypress Family)
	*Juniperus deppeana* (Juniper, Alligator) Cupressaceae (Cypress Family)
	*Juniperus monosperma* (Juniper, One-seed) Cupressaceae (Cypress Family)
	*Juniperus osteosperma* (Juniper, Utah) Cupressaceae (Cypress Family)
	*Juniperus scopulorum* (Juniper, Rocky Mountain) Cupressaceae (Cypress Family)

|
---K---
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	*Kallstroemia parviflora* (Caltrop) Zygophyllaceae (Caltrop Family)
Kochia scoparia -- see -- Bassia scoparia
	**Krascheninnikovia ceratoides ssp. lanata (Winterfat) Amaranthaceae (Amaranth Family**)
Krascheninnikovia lanata -- see -- Krascheninnikovia ceratoides ssp. lanata
Kuhnia eupatorioides -- see -- Brickellia eupatorioides

|
---L---
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	*Lactuca pulchella* (Blue Lettuce) Asteraceae (aka Compositae) (Sunflower Family)
	*Lactuca serriola* (Prickly Lettuce) Asteraceae (aka Compositae) (Sunflower Family)
Laennecia coulteri -- see -- Laennecia schiedeana
	*Laennecia schiedeana* (Woolwort, Pineland) Asteraceae (aka Compositae) (Sunflower Family)
Lappula marginata -- see -- Lappula occidentalis
	*Lappula occidentalis* (Stickseed) Boraginaceae (Forget-Me-Not Family)
Lappula redowskii -- see -- Lappula occidentalis
	**Lathyrus lanszwertii var. leucanthus (Sweetpea, Lanszwert's) Fabaceae (aka Leguminosae) (Pea Family**)
Lathyrus leucanthus -- see -- Lathyrus lanszwertii var. leucanthus
	*Lathyrus pauciflorus* (Sweetpea, Utah) Fabaceae (aka Leguminosae) (Pea Family)
	*Lepidium chalepense* (Pepperwort, Lens Pod) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Lepidium draba* (Whitetop) Brassicaceae (aka Cruciferae) (Mustard Family)
	**Lepidium lasiocarpum var. lasiocarpum (Pepperwort, Hairy Pod) Brassicaceae (aka Cruciferae) (Mustard Family**)
	*Lepidium latifolium* (Pepperweed, Broad-leaf; Pepperwort, Broad-leaf) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Lepidium montanum* (Peppergrass, Western; Pepperwort, Mountain) Brassicaceae (aka Cruciferae) (Mustard Family)
Lepidotheca suaveolens -- see -- Matricaria discoidea
Leptodactylon pungens -- see -- Linanthus pungens ssp. pungens
	**Leptosiphon nuttallii ssp. nuttallii (Phlox, Slender-tubed) Polemoniaceae (Phlox Family**)
Lesquerella fendleri -- see -- Physaria fendleri
Lesquerella rectipes -- see -- Physaria rectipes
	*Leucanthemum vulgare* (Daisy, Ox-eye) Asteraceae (aka Compositae) (Sunflower Family)
	*Lewisia nevadensis* (Bitterroot, Nevada) Montiaceae (Miner's Lettuce Family)
	*Lewisia pygmaea* (Bitterroot, Pygmy) Montiaceae (Miner's Lettuce Family)
Lidia obtusiloba -- see -- Cherleria obtusiloba
Ligularia amplectens -- see -- Senecio amplectens var. amplectens
Ligularia bigelovii -- see -- Senecio bigelovii var. hallii
Ligularia holmii -- see -- Senecio amplectens var. holmii
Ligularia soldanella -- see -- Senecio soldanella
	*Ligusticum porteri* (Loveroot; Lovage, Porter's; Osha) Apiaceae (aka Umbelliferae) (Parsley Family)
Ligusticum scopulorum -- see -- Conioselinum scopulorum
	**Lilium philadelphicum var. andinum (Lily, Wood) Liliaceae (Lily Family**)
Limnorchis aquilonis -- see -- Platanthera aquilonis
Limnorchis huronensis -- see -- Platanthera huronensis
Linanthastrum nuttallii -- see -- Leptosiphon nuttallii ssp. nuttallii
Linanthus nuttallii -- see -- Leptosiphon nuttallii ssp. nuttallii
	**Linanthus pungens ssp. pungens (Phlox, Prickly) Polemoniaceae (Phlox Family**)
	*Linaria dalmatica* (Butter and Eggs; Toadflax, Dalmatian) Plantaginaceae (Plantain Family)
Linaria genistifolia -- see -- Linaria dalmatica
	*Linaria vulgaris* (Butter and Eggs, Common; Toadflax) Plantaginaceae (Plantain Family)
	**Linnaea borealis ssp. americana (Twinflower, Linnaeus') Caprifoliaceae (Honeysuckle Family**)
	*Linum aristatum* (Flax, Yellow Bristle) Linaceae (Flax Family)
	**Linum lewisii var. lewisii (Flax, Blue) Linaceae (Flax Family**)
	*Linum puberulum* (Flax, Yellow Hairy; Flax, Plains) Linaceae (Flax Family)
	*Linum subteres* (Flax, Utah Yellow) Linaceae (Flax Family)
Listera cordata -- see -- Neottia cordata
	*Lithophragma glabrum* (Woodland Star, Bulbous; Woodland Star, Smooth) Saxifragaceae (Saxifrage Family)
	**Lithophragma parviflorum var. parviflorum (Woodland Star, Smallflower) Saxifragaceae (Saxifrage Family**)
	*Lithophragma tenellum* (Woodland Star, Slender; Woodland Star, Delicate) Saxifragaceae (Saxifrage Family)
	*Lithospermum incisum* (Gromwell, Fringed; Stoneseed, Plains; Puccoon, Fringed) Boraginaceae (Forget-Me-Not Family)
	*Lithospermum multiflorum* (Puccoon, Many-flowered; Gromwell, Purple; Stoneseed, Pretty) Boraginaceae (Forget-Me-Not Family)
	*Lithospermum ruderale* (Puccoon, Field; Stoneseed, Western) Boraginaceae (Forget-Me-Not Family)
	*Lloydia serotina* (Lily, Alp) Liliaceae (Lily Family)
Lomatium dissectum -- see -- Lomatium multifidum
	*Lomatium grayi* (Biscuitroot, Gray's; Lomatium, Milfoil) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lomatium latilobum* (Biscuitroot, Canyonlands; Lomatium, Canyonlands) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lomatium linearifolium* (Turkeypea; Potato, Indian; Snowdrops) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lomatium minimum* (Lomatium, Little) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lomatium multifidum* (Lomatium, Fernleaf) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lomatium parryi* (Biscuitroot, Parry's; Lomatium, Parry's) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lomatium triternatum* (Biscuitroot, Nine-leaf; Parsley, Nine-leaf Desert) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Lonicera involucrata* (Twinberry) Caprifoliaceae (Honeysuckle Family)
Lotus wrightii -- see -- Acmispon wrightii
	*Lupinus ammophilus* (Sand-loving Lupine) Fabaceae (aka Leguminosae) (Pea Family)
Lupinus ammophilus -- see -- Lupinus prunophilus
	*Lupinus argenteus* (Lupine, Silver) Fabaceae (aka Leguminosae) (Pea Family)
	*Lupinus brevicaulis* (Lupine, Short-stem) Fabaceae (aka Leguminosae) (Pea Family)
	*Lupinus caespitosus* (Lupine, Matted) Fabaceae (aka Leguminosae) (Pea Family)
	**Lupinus kingii var. kingii (Lupine, King's) Fabaceae (aka Leguminosae) (Pea Family**)
Lupinus lepidus -- see -- Lupinus caespitosus
Lupinus polyphyllus var. ammophilus -- see -- Lupinus prunophilus
Lupinus polyphyllus var. prunophilus -- see -- Lupinus prunophilus
	*Lupinus prunophilus* (Lupine, Chokecherry) Fabaceae (aka Leguminosae) (Pea Family)
	*Lupinus pusillus* (Lupine, Dwarf; Lupine, Rusty) Fabaceae (aka Leguminosae) (Pea Family)
Lychinus drummondii -- see -- Silene drummondii
	**Lycium pallidum var. pallidum (Wolfberry, Pale) Solanaceae (Nightshade Family**)
	*Lygodesmia arizonica* (Rushpink, Arizona; Skeltonplant, Arizona) Asteraceae (aka Compositae) (Sunflower Family)
	*Lygodesmia doloresensis* (Skeletonplant, Dolores River; Rushpink, Dolores River) Asteraceae (aka Compositae) (Sunflower Family)
	*Lygodesmia entrada* (Rushpink, Entrada; Skeletonplant, Entrada) Asteraceae (aka Compositae) (Sunflower Family)
	*Lygodesmia grandiflora* (Rushpink, Large-flowered; Skeletonplant, Large-flowered) Asteraceae (aka Compositae) (Sunflower Family)
	*Lygodesmia juncea* (Rushpink, Rush-like; Skeletonplant, Rush) Asteraceae (aka Compositae) (Sunflower Family)
Lysiella obtusata -- see -- Platanthera obtusata

|
---M---
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Machaeranthera bigelovii -- see -- Dieteria bigelovii var. bigelovii
Machaeranthera canescens -- see -- Dieteria canescens
Machaeranthera coloradoensis -- see -- Xanthisma coloradoense
Machaeranthera grindelioides -- see -- Xanthisma grindelioides var. grindelioides
Machaeranthera pinnatifida -- see -- Xanthisma spinulosum var. spinulosum
Machaeranthera pinnatifida variety pinnatifida -- see -- Xanthisma spinulosum var. paradoxum
	*Madia glomerata* (Tarplant) Asteraceae (aka Compositae) (Sunflower Family)
Mahonia fendleri -- see -- Berberis fendleri
Mahonia fremontii -- see -- Alloberberis fremontii
	*Mahonia repens* (Oregon Grape) Berberidaceae (Barberry Family)
	*Maianthemum* (Lily) Liliaceae (See Asparagaceae) (Asparagus Family)
	*Maianthemum* (Lily) Ruscaceae (See Asparagaceae) (Asparagus Family)
Maianthemum racemosum ssp. amplexicaule -- see -- Maianthemum amplexicaule
	*Maianthemum amplexicaule* (Solomon's Plume) Asparagaceae (Asparagus Family)
	*Maianthemum stellatum* (Lily, Star) Asparagaceae (Asparagus Family)
Mainanthemum racemosum -- see -- Maianthemum amplexicaule
	*Malacothrix sonchoides* (Dandelion, Sowthistle Desert) Asteraceae (aka Compositae) (Sunflower Family)
Malcomia africana -- see -- Strigosella africana
	*Malva neglecta* (Cheeseweed; Mallow, Cheese) Malvaceae (Mallow Family)
	*Marrubium vulgare* (Horehound) Lamiaceae (aka Labiatae) (Mint Family)
	*Matricaria discoidea* (Pineapple Weed) Asteraceae (aka Compositae) (Sunflower Family)
Matricaria matricarioides -- see -- Matricaria discoidea
	*Medicago lupulina* (Black Medic) Fabaceae (aka Leguminosae) (Pea Family)
	*Medicago sativa* (Alfalfa) Fabaceae (aka Leguminosae) (Pea Family)
Melilotus alba -- see -- Melilotus officinalis
Melilotus lutea -- see -- Melilotus officinalis
	*Melilotus officinalis* (Clover, Sweet) Fabaceae (aka Leguminosae) (Pea Family)
	*Mentha arvensis* (Mint, Field) Lamiaceae (aka Labiatae) (Mint Family)
	*Mentzelia albicaulis* (Blazingstar, Whitestem; Stickleaf, Whitestem) Loasaceae (Loasa Family)
	*Mentzelia multiflora* (Blazingstar, Desert; Blazingstar, Adonis; Stickleaf, Adonis) Loasaceae (Loasa Family)
	*Mentzelia pterosperma* (Blazingstar, Wingseed; Stickleaf, Wingseed) Loasaceae (Loasa Family)
	*Mentzelia rusbyi* (Blazingstar, Rusby's; Stickleaf, Rusby's) Loasaceae (Loasa Family)
	*Menyanthes trifoliata* (Buckbean) Menyanthaceae (Buckbean Family)
Mertensia brevistyla -- see -- Mertensia fusiformis
	**Mertensia ciliata var. ciliata (Bluebells, Fringed; Bluebells, Mountain) Boraginaceae (Forget-Me-Not Family**)
	*Mertensia franciscana* (Bluebells, Franciscan; Bluebells, Flagstaff) Boraginaceae (Forget-Me-Not Family)
	*Mertensia fusiformis* (Bluebells, Spindle-rooted) Boraginaceae (Forget-Me-Not Family)
	*Mertensia lanceolata* (Bluebells, Lance-leaf) Boraginaceae (Forget-Me-Not Family)
Mertensia oblongifolia -- see -- Mertensia fusiformis
Mesynium aristatum -- see -- Linum aristatum
Mesynium puberulum -- see -- Linum puberulum
	*Micranthes odontoloma* (Saxifrage, Brook) Saxifragaceae (Saxifrage Family)
	*Micranthes oregana* (Saxifrage, Oregon Snowball) Saxifragaceae (Saxifrage Family)
	*Micranthes rhomboidea* (Saxifrage, Snowball; Saxifrage, Diamondleaf) Saxifragaceae (Saxifrage Family)
	*Microsteris gracilis* (Phlox, Slender) Polemoniaceae (Phlox Family)
Mimulus eastwoodiae -- see -- Erythranthe eastwoodiae
Mimulus guttatus -- see -- Erythranthe guttata
Mimulus rubellus -- see -- Erythranthe rubella
Mimulus suksdorfii -- see -- Erythranthe suksdorfii
Mimulus tilingii -- see -- Erythranthe tilingii
Minuartia macrantha -- see -- Sabulina macrantha
Minuartia obtusiloba -- see -- Cherleria obtusiloba
Minuartia rubella -- see -- Sabulina rubella
	**Mirabilis linearis var. linearis (Four O'Clocks, Narrow-leaf) Nyctaginaceae (Four O'Clock Family**)
	*Mirabilis multiflora* (Four O'Clocks, Showy) Nyctaginaceae (Four O'Clock Family)
	*Mirabilis oxybaphoides* (Four O'Clocks, Spreading) Nyctaginaceae (Four O'Clock Family)
Mitella pentandra -- see -- Pectiantia pentandra
Mitella stauropetala -- see -- Ozomelis stauropetala
	*Moehringia macrophylla* (Sandwort, Bigleaf) Caryophyllaceae (Pink Family)
	**Monardella odoratissima ssp. glauca (Monarda, Aromatic; Horsemint; Beebalm; Pennyroyal) Lamiaceae (aka Labiatae) (Mint Family**)
	*Moneses uniflora* (Single Delight; Wood Nymph) Ericaceae (Heath Family)
Monolepis nuttalliana -- see -- Blitum nuttallianum
Mugedium pulchellum -- see -- Lactuca pulchella
	*Myriopteris gracilis* (Fern, Slender Lip) Pteridaceae (Maidenhair Fern Family)

|
---N---
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	*Nama retrorsa* (Nama, Howell's; Fiddleleaf, Betatakin) Namaceae (Fiddleleaf Family)
	*Nasturtium officinale* (Cress, Water) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Navarretia breweri* (Pincushion, Yellow) Polemoniaceae (Phlox Family)
	*Navarretia sinistra* (Gilia, Alva Day's) Polemoniaceae (Phlox Family)
Negundo aceroides -- see -- Acer negundo
	*Neokochia americana* (Green Molly) Amaranthaceae (Amaranth Family)
	*Neottia cordata* (Twayblade, Heartleaf) Orchidaceae (Orchid Family)
	*Nicotiana attenuata* (Tobacco, Coyote) Solanaceae (Nightshade Family)
	**Noccaea fendleri ssp. glauca (Candytuft, Wild; Pennycress) Brassicaceae (aka Cruciferae) (Mustard Family**)
Noccaea montana -- see -- Noccaea fendleri ssp. glauca
Nuphar lutea subspecies polysepala -- see -- Nuphar polysepala
	*Nuphar polysepala* (Lily, Water; Spatterdock) Nymphaeaceae (Water-Lily Family)
Nuttallia pterosperma -- see -- Mentzelia pterosperma

|
---O---
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	*Oenothera albicaulis* (Primrose, White-stemmed Evening) Onagraceae (Evening Primrose Family)
	**Oenothera caespitosa ssp. marginata (Primrose, Tufted Evening) Onagraceae (Evening Primrose Family**)
	**Oenothera caespitosa ssp. navajoensis (Primrose, Navajo Evening) Onagraceae (Evening Primrose Family**)
	*Oenothera coronopifolia* (Primrose, Cutleaf Evening) Onagraceae (Evening Primrose Family)
	*Oenothera curtiflora* (Velvetweed) Onagraceae (Evening Primrose Family)
Oenothera curtifolia -- see -- Oenothera curtiflora
	**Oenothera elata ssp. hirsutissima (Primrose, Hooker's Evening) Onagraceae (Evening Primrose Family**)
	*Oenothera flava* (Primrose, Yellow Evening) Onagraceae (Evening Primrose Family)
	*Oenothera lavandulifolia* (Sundrops) Onagraceae (Evening Primrose Family)
	*Oenothera longissima* (Primrose, Bridges Evening) Onagraceae (Evening Primrose Family)
	*Oenothera pallida* (Primrose, Pale Evening) Onagraceae (Evening Primrose Family)
Oligosporus dracunculus -- see -- Artemisia dracunculus
	*Onobrychis viciifolia* (Sainfoin) Fabaceae (aka Leguminosae) (Pea Family)
	*Opuntia fragilis* (Cactus, Fragile Prickly Pear) Cactaceae (Cactus Family)
Opuntia imbricata -- see -- Cylindropuntia imbricata
	*Opuntia phaeacantha* (Cactus, Brown-spined Prickly Pear) Cactaceae (Cactus Family)
	*Opuntia polyacantha* (Cactus, Many-spined Prickly Pear; Cactus, Plains Prickly Pear) Cactaceae (Cactus Family)
Opuntia whipplei -- see -- Cylindropuntia whipplei var. whipplei
Oreobroma nevadensis -- see -- Lewisia nevadensis
Oreobroma pygmaea -- see -- Lewisia pygmaea
	*Oreocarya flava* (Cryptantha, Yellow) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya flavoculata* (Cat's Eye, Little Yellow) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya fulvocanescens* (Cat's Eye, Gray) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya humilis* (Cat's Eye, Humble) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya paradoxa* (Cat's Eye, Paradox) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya revealii* (Cat's Eye, Reveal's) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya suffruticosa* (Cat's Eye, Shrubby) Boraginaceae (Forget-Me-Not Family)
	*Oreocarya tenuis* (Cat's Eye, Slender) Boraginaceae (Forget-Me-Not Family)
	*Oreochrysum parryi* (Goldenweed, Parry's; Goldenrod, Parry's) Asteraceae (aka Compositae) (Sunflower Family)
	**Oreoxis alpina ssp. alpina (Parsley, Alpine) Apiaceae (aka Umbelliferae) (Parsley Family**)
	*Oreoxis bakeri* (Parsley, Baker's Alpine) Apiaceae (aka Umbelliferae) (Parsley Family)
Orobanche arizonica -- see -- Aphyllon arizonicum
Orobanche cooperi -- see -- Aphyllon arizonicum
Orobanche fasciculata -- see -- Aphyllon fasciculatum
Orobanche uniflora -- see -- Aphyllon uniflorum
Orogenia linearifolia -- see -- Lomatium linearifolium
Orthilia obtustata -- see -- Orthilia secunda
	*Orthilia secunda* (Wintergreen, One-sided; Sidebells) Ericaceae (Heath Family)
	*Orthocarpus luteus* (Owl-Clover, Yellow) Orobanchaceae (Broomrape Family)
	*Orthocarpus purpureoalbus* (Owl-Clover, Purple) Orobanchaceae (Broomrape Family)
	*Osmorhiza berteroi* (Sweet Cicely, Mountain) Apiaceae (aka Umbelliferae) (Parsley Family)
Osmorhiza chilensis -- see -- Osmorhiza berteroi
Osmorhiza chilensis -- see -- Osmorhiza depauperata
	*Osmorhiza depauperata* (Sweet Cicely, Dwarf) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Osmorhiza occidentalis* (Sweet Cicely, Western) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Ostrya knowltonii* (Hophornbeam, Western) Betulaceae (Birch Family)
Oxalis alpina -- see -- Oxalis metcalfei
	*Oxalis dillenii* (Sorrel, Yellow Wood) Oxalidaceae (Wood Sorrel Family)
	*Oxalis metcalfei* (Sorrel, Metcalf's Wood) Oxalidaceae (Wood Sorrel Family)
Oxalis violacea -- see -- Oxalis metcalfei
Oxybaphus linearis -- see -- Mirabilis linearis var. linearis
	*Oxypolis fendleri* (Cowbane) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Oxyria digyna* (Sorrel, Mountain) Polygonaceae (Buckwheat Family)
Oxytenia acerosa -- see -- Euphrosyne acerosa
Oxytropis deflexa var. deflexa -- see -- Oxytropis deflexa var. foliolosa
	**Oxytropis deflexa var. foliolosa (Locoweed, Alpine Nodding) Fabaceae (aka Leguminosae) (Pea Family**)
Oxytropis deflexa var. pulcherrima -- see -- Oxytropis deflexa var. foliolosa
	**Oxytropis deflexa var. sericea (Locoweed, Silky Nodding) Fabaceae (aka Leguminosae) (Pea Family**)
	**Oxytropis lambertii var. bigelovii (Locoweed, Lambert's) Fabaceae (aka Leguminosae) (Pea Family**)
	*Oxytropis parryi* (Locoweed, Parry's) Fabaceae (aka Leguminosae) (Pea Family)
	*Ozomelis stauropetala* (Mitrewort, White; Bishop's Cap, White) Saxifragaceae (Saxifrage Family)

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---P---
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	*Packera castoreus* (Groundsel, Belknap Mountain) Asteraceae (aka Compositae) (Sunflower Family)
	*Packera crocata* (Ragwort, Saffron; Groundsel, Saffron) Asteraceae (aka Compositae) (Sunflower Family)
	*Packera dimorphophylla* (Groundsel, Two Leaf; Ragwort, Two Leaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Packera mancosana* (Packera, Mancos Shale) Asteraceae (aka Compositae) (Sunflower Family)
	*Packera multilobata* (Groundsel, Many-lobed; Ragwort, Many-lobed; Groundsel, Lobeleaf) Asteraceae (aka Compositae) (Sunflower Family)
	**Packera neomexicana var. mutabilis (Groundsel, New Mexico; Ragwort, New Mexico) Asteraceae (aka Compositae) (Sunflower Family**)
Packera oodes -- see -- Packera streptanthifolia
	*Packera pseudaurea* (Groundsel, Streambank; Ragwort, Streambank) Asteraceae (aka Compositae) (Sunflower Family)
Packera saxosa -- see -- Packera werneriifolia
	*Packera streptanthifolia* (Groundsel, Rocky Mountain, Ragwort, Rocky Mountain) Asteraceae (aka Compositae) (Sunflower Family)
Packera thurberi -- see -- Packera neomexicana var. mutabilis
	*Packera werneriifolia* (Groundsel, Werner's; Groundsel, Hoary; Ragwort, Werner's) Asteraceae (aka Compositae) (Sunflower Family)
Padus virginiana -- see -- Prunus virginiana
	*Parnassia* (Grass-of-Parnassus) Parnassiaceae (See Celastraceae) (Staff-tree Family)
	*Parnassia fimbriata* (Grass-of-Parnassus, Fringed) Celastraceae (Staff-tree Family)
Parnassia palustris -- see -- Parnassia parviflora
	*Parnassia parviflora* (Grass-of-Parnassus, Small Flower) Celastraceae (Staff-tree Family)
	*Paxistima myrsinites* (Mountain Lover) Celastraceae (Staff-tree Family)
	*Pectiantia pentandra* (Mitrewort, Green; Bishop's Cap, Green) Saxifragaceae (Saxifrage Family)
	**Pectis angustifolia var. angustifolia (Lemonscent) Asteraceae (aka Compositae) (Sunflower Family**)
	**Pedicularis bracteosa var. paysoniana (Lousewort, Towering; Lousewort, Fern Leaf) Orobanchaceae (Broomrape Family**)
	*Pedicularis centranthera* (Lousewort, Dwarf; Lousewort, Spring) Orobanchaceae (Broomrape Family)
	*Pedicularis groenlandica* (Elephant Heads) Orobanchaceae (Broomrape Family)
	**Pedicularis parryi ssp. parryi (Lousewort, Parry's) Orobanchaceae (Broomrape Family**)
	*Pedicularis procera* (Lousewort, Giant) Orobanchaceae (Broomrape Family)
	*Pedicularis racemosa* (Parrot's Beak; Lousewort, Sickletop) Orobanchaceae (Broomrape Family)
Pedicularis scopulorum -- see -- Pedicularis sudetica ssp. scopulorum
	**Pedicularis sudetica ssp. scopulorum (Lousewort, Alpine) Orobanchaceae (Broomrape Family**)
	*Pediocactus simpsonii* (Cactus, Simpson's; Ball Cactus, Mountain) Cactaceae (Cactus Family)
	**Pediomelum megalanthum var. megalanthum (Breadroot, Large-flower) Fabaceae (aka Leguminosae) (Pea Family**)
	*Pediomelum tenuiflorum* (Breadroot, Slender-flower) Fabaceae (aka Leguminosae) (Pea Family)
Pellaea limitanea -- see -- Argyrochosma limitanea
	*Penstemon* (Penstemon) Scrophulariaceae (Also see Plantain Family) (Snapdragon Family)
	*Penstemon ambiguus* (Bush Penstemon) Plantaginaceae (Plantain Family)
	*Penstemon angustifolius* (Penstemon, Narrow-leaf; Beardtongue, Narrow-leaf) Plantaginaceae (Plantain Family)
	**Penstemon barbatus var. torreyi (Scarlet Bugler; Penstemon, Scarlet; Beardtongue, Scarlet) Plantaginaceae (Plantain Family**)
	**Penstemon barbatus var. trichander (Scarlet Bugler; Penstemon, Scarlet; Beardtongue, Scarlet) Plantaginaceae (Plantain Family**)
	*Penstemon breviculus* (Penstemon, Short; Beardtongue, Short) Plantaginaceae (Plantain Family)
Penstemon breviculus -- see -- Penstemon ophianthus
Penstemon bridgesii -- see -- Penstemon rostriflorus
	*Penstemon comarrhenus* (Penstemon, Hairy; Beardtongue, Dusty) Plantaginaceae (Plantain Family)
	*Penstemon crandallii* (Penstemon, Crandall's; Beardtongue, Crandall's) Plantaginaceae (Plantain Family)
	*Penstemon cyanocaulis* (Penstemon, Bluestem; Beardtongue, Bluestem) Plantaginaceae (Plantain Family)
	*Penstemon eatonii* (Penstemon, Eaton's; Beardtongue, Eaton's) Plantaginaceae (Plantain Family)
	*Penstemon hallii* (Penstemon, Hall's; Beardtongue, Hall's) Plantaginaceae (Plantain Family)
	*Penstemon harbourii* (Penstemon, Harbour's; Beardtongue, Harbour's) Plantaginaceae (Plantain Family)
Penstemon jamesii ssp ophianthus -- see -- Penstemon ophianthus
	*Penstemon lentus variety albiflorus* (Penstemon, Abajo Handsome; Beardtongue, Abajo Handsome) Plantaginaceae (Plantain Family)
	*Penstemon lentus variety lentus* (Penstemon, Handsome; Beardtongue, Handsome) Plantaginaceae (Plantain Family)
	**Penstemon linarioides ssp. coloradoensis (Penstemon, Narrow-leaf; Beardtongue, Toad-flax) Plantaginaceae (Plantain Family**)
	*Penstemon mensarum* (Penstemon, Mesa; Beardtongue, Tiger) Plantaginaceae (Plantain Family)
	*Penstemon ophianthus* (Penstemon, Snake; Beardtongue, Loa) Plantaginaceae (Plantain Family)
	**Penstemon palmeri var. palmeri (Penstemon, Palmer's; Beardtongue, Palmer's) Plantaginaceae (Plantain Family**)
Penstemon parviflorus -- see -- Penstemon ophianthus
	*Penstemon rostriflorus* (Penstemon, Bridges'; Beardtongue, Beaked) Plantaginaceae (Plantain Family)
	*Penstemon rydbergii* (Penstemon, Rydberg's; Beardtongue, Rydberg's) Plantaginaceae (Plantain Family)
	*Penstemon strictus* (Penstemon, Rocky Mountain) Plantaginaceae (Plantain Family)
Penstemon trichander -- see -- Penstemon barbatus var. trichander
	*Penstemon utahensis* (Penstemon, Utah; Beardtongue, Utah) Plantaginaceae (Plantain Family)
	*Penstemon venustus* (Beardtongue, Elegant) Plantaginaceae (Plantain Family)
	*Penstemon whippleanus* (Penstemon, Whipple's; Beardtongue, Whipple's) Plantaginaceae (Plantain Family)
Pentaphylloides floribunda -- see -- Dasiphora fruticosa ssp. floribunda
	*Peraphyllum ramosissimum* (Crab Apple, Wild; Squaw Apple) Rosaceae (Rose Family)
Peritoma lutea -- see -- Cleomella lutea
Peritoma serrulata -- see -- Cleomella serrulata
	*Persicaria amphibia* (Smartweed, Water) Polygonaceae (Buckwheat Family)
	*Persicaria lapathifolia* (Smartweed, Dock-leaf) Polygonaceae (Buckwheat Family)
	*Persicaria maculosa* (Lady's Thumb, Spotted) Polygonaceae (Buckwheat Family)
Petradoria pumila -- see -- Petradoria pumila var. graminea
	**Petradoria pumila var. graminea (Goldenrod, Grass-like Rock) Asteraceae (aka Compositae) (Sunflower Family**)
	**Petradoria pumila var. pumila (Goldenrod, Rock) Asteraceae (aka Compositae) (Sunflower Family**)
	*Petrophytum caespitosum* (Rockmat) Rosaceae (Rose Family)
	*Phacelia bakeri* (Phacelia, Baker's) Hydrophyllaceae (Waterleaf Family)
	*Phacelia crenulata* (Scorpionweed, Notch-leaf; Phacelia, Crenulated) Hydrophyllaceae (Waterleaf Family)
	**Phacelia glandulosa var. glandulosa (Phacelia, Glandular) Hydrophyllaceae (Waterleaf Family**)
	*Phacelia heterophylla* (Phacelia, Varied-leaf; Scorpionweed, Varied-leaf) Hydrophyllaceae (Waterleaf Family)
	*Phacelia howelliana* (Phacelia, Howell's) Hydrophyllaceae (Waterleaf Family)
	*Phacelia integrifolia* (Phacelia, Whole) Hydrophyllaceae (Waterleaf Family)
	**Phacelia ivesiana var. ivesiana (Phacelia, Ives'; Scorpionweed, Ives') Hydrophyllaceae (Waterleaf Family**)
	*Phacelia sericea* (Phacelia, Silky; Purplefringe) Hydrophyllaceae (Waterleaf Family)
	*Phemeranthus brevifolius* (Rockpink, Shortleaf; Fameflower, Canyonlands) Montiaceae (Miner's Lettuce Family)
	*Phemeranthus confertiflorus* (Rockpink, Rocky Mountain; Fameflower, Rocky Mountain) Montiaceae (Miner's Lettuce Family)
Phemeranthus parviflorus -- see -- Phemeranthus confertiflorus
	**Philadelphus microphyllus var. microphyllus (Mock Orange) Hydrangeaceae (Hydrangea Family**)
	*Phlox austromontana* (Phlox, Southern; Phlox, Desert) Polemoniaceae (Phlox Family)
	*Phlox canescens* (Phlox, Gray; Phlox, Hoary) Polemoniaceae (Phlox Family)
	**Phlox condensata ssp. condensata (Phlox, Alpine) Polemoniaceae (Phlox Family**)
Phlox hoodii ssp. canescens -- see -- Phlox canescens
	*Phlox longifolia* (Phlox, Long-leaf) Polemoniaceae (Phlox Family)
	*Phlox multiflora* (Phlox, Many-flowered; Phlox, Rocky Mountain) Polemoniaceae (Phlox Family)
	*Phoradendron juniperinum* (Mistletoe, Juniper) Santalaceae (Sandalwood Family)
	*Physaria acutifolia* (Bladderpod, Double) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Physaria fendleri* (Bladderpod, Fendler's) Brassicaceae (aka Cruciferae) (Mustard Family)
	**Physaria newberryi ssp. newberryi (Twinpod, Newberry's) Brassicaceae (aka Cruciferae) (Mustard Family**)
	*Physaria pulvinata* (Bladderpod, Cushion) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Physaria rectipes* (Bladderpod, Straight) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Physaria scrotiformis* (Bladderpod, West Silver) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Picea engelmannii* (Spruce, Engelmann) Pinaceae (Pine Family)
	*Picea pungens* (Spruce, Colorado Blue) Pinaceae (Pine Family)
	*Picradeniopsis multiflora* (Threadleaf) Asteraceae (aka Compositae) (Sunflower Family)
Picrothamnus desertorum -- see -- Artemisia spinescens
	*Pilosella aurantiaca* (Orange Hawkweed) Asteraceae (aka Compositae) (Sunflower Family)
	**Pinus contorta var. latifolia (Pine, Lodgepole) Pinaceae (Pine Family**)
	*Pinus edulis* (Pine, Pinyon) Pinaceae (Pine Family)
	*Pinus flexilis* (Pine, Limber) Pinaceae (Pine Family)
	**Pinus ponderosa var. scopulorum (Pine, Ponderosa) Pinaceae (Pine Family**)
	*Plagiobothrys hispidulus* (Popcorn Flower, Bristly) Boraginaceae (Forget-Me-Not Family)
Plagiobothrys scouleri -- see -- Plagiobothrys hispidulus
	*Plantago eriopoda* (Plantain, Redwool) Plantaginaceae (Plantain Family)
	*Plantago patagonica* (Plantain, Woolly) Plantaginaceae (Plantain Family)
Plantago purshii -- see -- Plantago patagonica
	*Platanthera aquilonis* (Orchid, Northern Bog) Orchidaceae (Orchid Family)
	*Platanthera huronensis* (Orchid, Huron Bog) Orchidaceae (Orchid Family)
Platanthera hyperborea -- see -- Platanthera aquilonis
Platanthera hyperborea -- see -- Platanthera huronensis
	*Platanthera obtusata* (Orchid, Blunt-leaf) Orchidaceae (Orchid Family)
	**Platyschkuhria integrifolia var. oblongifolia (Daisy, Basin) Asteraceae (aka Compositae) (Sunflower Family**)
Pneumonanthe affinis -- see -- Gentiana affinis
Pneumonanthe parryi -- see -- Gentiana parryi
	*Podistera eastwoodiae* (Woodroot, Eastwood's) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Polemonium confertum* (Sky Pilot, Dense) Polemoniaceae (Phlox Family)
	*Polemonium foliosissimum* (Jacob's Ladder, Leafy) Polemoniaceae (Phlox Family)
	**Polemonium pulcherrimum ssp. delicatum (Jacob's Ladder, Beautiful) Polemoniaceae (Phlox Family**)
	*Polemonium viscosum* (Sky Pilot, Sticky) Polemoniaceae (Phlox Family)
	*Poliomintha incana* (Mint, Gray; Sage, Purple) Lamiaceae (aka Labiatae) (Mint Family)
Polygala subspinosa -- see -- Rhinotropis subspinosa
Polygonum amphibium -- see -- Persicaria amphibia
	*Polygonum douglasii* (Knotweed, Douglas') Polygonaceae (Buckwheat Family)
Polygonum lapathifolium -- see -- Persicaria lapathifolia
Polygonum persicaria -- see -- Persicaria maculosa
	*Polypodium hesperium* (Polypody, Western) Polypodiaceae (Western Polypody Family)
	*Polystichum lonchitis* (Fern, Holly) Dryopteridaceae (Wood Fern Family)
	*Populus acuminata* (Cottonwood, Lanceleaf) Salicaceae (Willow Family)
	*Populus alba* (Poplar, Silver) Salicaceae (Willow Family)
	*Populus angustifolia* (Cottonwood, Narrowleaf) Salicaceae (Willow Family)
	**Populus deltoides ssp. wislizeni and ssp. fremontii (Cottonwood) Salicaceae (Willow Family**)
Populus fremontii -- see -- Populus deltoides ssp. wislizeni and ssp. fremontii
	*Populus nigra* (Poplar, Lombardy) Salicaceae (Willow Family)
	*Populus tremuloides* (Aspen) Salicaceae (Willow Family)
Populus x acuminata -- see -- Populus acuminata
	*Portulaca oleracea* (Purslane) Portulacaceae (Portulaca Family)
Potentilla arguta -- see -- Drymocallis convallaria
	*Potentilla concinna* (Cinquefoil, Elegant) Rosaceae (Rose Family)
Potentilla diversifolia -- see -- Potentilla glaucophylla
Potentilla fruticosa -- see -- Dasiphora fruticosa ssp. floribunda
	*Potentilla glaucophylla* (Blueleaf Cinquefoil) Rosaceae (Rose Family)
	*Potentilla gracilis* (Cinquefoil, Slender) Rosaceae (Rose Family)
	*Potentilla hippiana* (Cinquefoil, Hippio's; Cinquefoil, Woolly) Rosaceae (Rose Family)
	*Potentilla nivea* (Cinquefoil, Snow) Rosaceae (Rose Family)
	*Potentilla pensylvanica* (Cinquefoil, Pennsylvania) Rosaceae (Rose Family)
	*Potentilla plattensis* (Cinquefoil, Platte River) Rosaceae (Rose Family)
	*Potentilla pulcherrima* (Cinquefoil, Beautiful) Rosaceae (Rose Family)
Potentilla rubricaulis -- see -- Potentilla saximontana
	*Potentilla saximontana* (Cinquefoil, Red-stem) Rosaceae (Rose Family)
Potentilla sibbaldia -- see -- Sibbaldia procumbens
	*Poterium sanguisorba* (Burnet) Rosaceae (Rose Family)
	*Primula parryi* (Primrose, Parry's) Primulaceae (Primrose Family)
	*Primula pauciflora* (Shooting Star) Primulaceae (Primrose Family)
	*Primula specuicola* (Primrose, Alcove) Primulaceae (Primrose Family)
	*Proatriplex pleiantha* (Shadscale, Mancos; Orach, Four Corners) Amaranthaceae (Amaranth Family)
	*Prosartes trachycarpa* (Fairybells) Liliaceae (Lily Family)
	*Prunella vulgaris* (Self-heal; Heal-all) Lamiaceae (aka Labiatae) (Mint Family)
	*Prunus virginiana* (Chokecherry) Rosaceae (Rose Family)
Pseudocymopterus montanus -- see -- Cymopterus lemmonii
Pseudostellaria jamesiana -- see -- Torreyostellaria jamesiana
	**Pseudotsuga menziesii var. glauca (Fir, Douglas) Pinaceae (Pine Family**)
Psilochenia intermedia -- see -- Crepis acuminata
Psilochenia intermedia -- see -- Crepis intermedia
Psilochenia occidentalis -- see -- Crepis occidentalis
Psilochenia runcinata -- see -- Crepis runcinata
	*Psilostrophe sparsiflora* (Paper Flower) Asteraceae (aka Compositae) (Sunflower Family)
Psoralea tenuiflora -- see -- Pediomelum tenuiflorum
Psoralidium tenuiflorum -- see -- Pediomelum tenuiflorum
Psychrophila leptosepala -- see -- Caltha chionophila
	*Pteridium aquilinum* (Fern, Bracken) Dennstaedtiaceae (Bracken Family)
Pterogonum alatum -- see -- Eriogonum alatum
	*Pterospora andromedea* (Pinedrops) Ericaceae (Heath Family)
Pulsatilla ludoviciana -- see -- Pulsatilla nuttalliana
	*Pulsatilla nuttalliana* (Pasqueflower) Ranunculaceae (Buttercup Family)
Pulsatilla patens ssp. multifida -- see -- Pulsatilla nuttalliana
	*Purshia stansburyana* (Cliffrose) Rosaceae (Rose Family)
	**Purshia tridentata var. tridentata (Buckbrush; Bitterbrush) Rosaceae (Rose Family**)
	*Pyrola* (Wintergreen) Pyrolaceae (See Ericaceae) (Heath Family)
	**Pyrola asarifolia ssp. asarifolia (Wintergreen, Pink; Pyrola, Pink) Ericaceae (Heath Family**)
	*Pyrola chlorantha* (Wintergreen, Green-flowered) Ericaceae (Heath Family)
	*Pyrola minor* (Wintergreen, Lesser) Ericaceae (Heath Family)
	*Pyrola picta* (Wintergreen, Pictureleaf; Pyrola, Variegated) Ericaceae (Heath Family)
Pyrola rotundifolia -- see -- Pyrola asarifolia ssp. asarifolia
Pyrola secunda -- see -- Orthilia secunda
	**Pyrrocoma crocea var. crocea (Goldenweed) Asteraceae (aka Compositae) (Sunflower Family**)
	**Pyrrocoma uniflora var. uniflora (Goldenweed, Plantain) Asteraceae (aka Compositae) (Sunflower Family**)

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---Q---
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	**Quercus gambelii var. gambelii (Oak, Gambel's) Fagaceae (Beech Family**)
Quercus havardii -- see -- Quercus welshii
	*Quercus turbinella* (Oak, Holly; Oak, Shrub Live) Fagaceae (Beech Family)
Quercus undulata -- see -- Quercus welshii
	*Quercus welshii* (Oak, Welsh's; Oak, Shinnery) Fagaceae (Beech Family)

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	**Ranunculus alismifolius var. montanus (Buttercup, Plantain-leaf) Ranunculaceae (Buttercup Family**)
Ranunculus aquatilis -- see -- Ranunculus longirostris
Ranunculus cymbalaria -- see -- Halerpestus cymbalaria
	*Ranunculus eschscholtzii* (Buttercup, Eschscholtz's) Ranunculaceae (Buttercup Family)
	**Ranunculus glaberrimus var. ellipticus (Buttercup, Sagebrush) Ranunculaceae (Buttercup Family**)
	**Ranunculus inamoenus var. inamoenus (Buttercup, Graceful) Ranunculaceae (Buttercup Family**)
	*Ranunculus longirostris* (Crowfoot, Water) Ranunculaceae (Buttercup Family)
	**Ranunculus macauleyi var. macauleyi (Buttercup, Macauley's; Buttercup, Rocky Mountain) Ranunculaceae (Buttercup Family**)
Ranunculus testiculatus -- see -- Ceratocephala testiculata
	*Ranunculus uncinatus* (Buttercup, Woodland) Ranunculaceae (Buttercup Family)
Rhamnus betulifolia ssp. obovata -- see -- Frangula obovata
	*Rhamnus smithii* (Buckthorn, Smith's) Rhamnaceae (Buckthorn Family)
	*Rhaponticum repens* (Knapweed, Russian) Asteraceae (aka Compositae) (Sunflower Family)
	*Rhinotropis subspinosa* (Milkwort) Polygalaceae (Milkwort Family)
	**Rhodiola integrifolia ssp. integrifolia (King's Crown) Crassulaceae (Stonecrop Family**)
	*Rhodiola rhodantha* (Queen's Crown; Rose Root; Rose Crown) Crassulaceae (Stonecrop Family)
	**Rhus aromatica var. trilobata (Sumac, Aromatic; Skunkbush) Anacardiaceae (Sumac Family**)
	*Rhus glabra* (Sumac, Smooth) Anacardiaceae (Sumac Family)
Rhus radicans var. rydbergii -- see -- Toxicodendron rydbergii
Rhus trilobata -- see -- Rhus aromatica var. trilobata
	*Ribes aureum* (Currant, Golden) Grossulariaceae (Currant Family)
	**Ribes cereum var. cereum (Currant, Wax) Grossulariaceae (Currant Family**)
Ribes coloradense -- see -- Ribes laxiflorum
	**Ribes inerme var. inerme (Currant, Whiskey; Currant, Whitestem; Gooseberry; Whitestem) Grossulariaceae (Currant Family**)
	*Ribes laxiflorum* (Currant, Trailing) Grossulariaceae (Currant Family)
	*Ribes leptanthum* (Currant, Trumpet) Grossulariaceae (Currant Family)
	*Ribes montigenum* (Currant, Mountain; Currant, Prickly) Grossulariaceae (Currant Family)
	*Ribes wolfii* (Currant, Wolf's) Grossulariaceae (Currant Family)
	**Robinia neomexicana var. neomexicana (Locust, New Mexico) Fabaceae (aka Leguminosae) (Pea Family**)
	*Rorippa alpina* (Yellowcress, Alpine) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Rosa nutkana* (Nootka Rose) Rosaceae (Rose Family)
	*Rosa woodsii* (Rose, Woods') Rosaceae (Rose Family)
Rubacer parviflorus -- see -- Rubus nutkanus
	**Rubus idaeus ssp. strigosus (Raspberry, Red) Rosaceae (Rose Family**)
	*Rubus nutkanus* (Thimbleberry; Salmonberry) Rosaceae (Rose Family)
Rubus parviflorus var. parviflorus -- see -- Rubus nutkanus
Rubus strigosus -- see -- Rubus idaeus ssp. strigosus
Rudbeckia ampla -- see -- Rudbeckia laciniata var. ampla
	**Rudbeckia laciniata var. ampla (Coneflower, Cutleaf; Coneflower, Goldenglow; Susan, Black-Eyed) Asteraceae (aka Compositae) (Sunflower Family**)
	**Rumex crispus ssp. crispus (Dock, Curly) Polygonaceae (Buckwheat Family**)
	*Rumex densiflorus* (Dock, Dense-flower) Polygonaceae (Buckwheat Family)
	*Rumex hymenosepalus* (Rhubarb, Wild; Canaigre) Polygonaceae (Buckwheat Family)
Rydbergia grandiflora -- see -- Hymenoxys grandiflora

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Sabina deppeana -- see -- Juniperus deppeana
Sabina monosperma -- see -- Juniperus monosperma
Sabina osteosperma -- see -- Juniperus osteosperma
Sabina scopulorum -- see -- Juniperus scopulorum
	*Sabulina macrantha* (Sandwort, Large-flower) Caryophyllaceae (Pink Family)
	*Sabulina rubella* (Sandwort, Red) Caryophyllaceae (Pink Family)
Salix arctica -- see -- Salix petrophila
Salix babylonica -- see -- Salix matsudana
	*Salix brachycarpa* (Willow, Shortfruit; Willow, Barren Ground) Salicaceae (Willow Family)
	*Salix drummondiana* (Willow, Drummond's) Salicaceae (Willow Family)
	**Salix exigua var. exigua (Willow, Coyote) Salicaceae (Willow Family**)
Salix globosa -- see -- Salix matsudana
	*Salix laevigata* (Willow, Red) Salicaceae (Willow Family)
	*Salix matsudana* (Willow, Navajo; Willow, Globe; Willow, Hankow) Salicaceae (Willow Family)
	*Salix monticola* (Willow, Mountain) Salicaceae (Willow Family)
	*Salix nivalis* (Willow, Snow) Salicaceae (Willow Family)
	*Salix petrophila* (Willow, Rock) Salicaceae (Willow Family)
	*Salix planifolia* (Willow, Planeleaf) Salicaceae (Willow Family)
Salix reticulata -- see -- Salix nivalis
	*Salix scouleriana* (Willow, Scouler's) Salicaceae (Willow Family)
	*Salsola collina* (Tumbleweed; Tumbleweed, Pallas') Amaranthaceae (Amaranth Family)
	*Salsola tragus* (Tumbleweed; Tumbleweed, Russian) Amaranthaceae (Amaranth Family)
Sambucus cerulea -- see -- Sambucus nigra ssp. cerulea
Sambucus microbotrys -- see -- Sambucus racemosa
	**Sambucus nigra ssp. cerulea (Elderberry, Blue) Viburnaceae (Arrow-Wood Family**)
	*Sambucus racemosa* (Elderberry, Red) Viburnaceae (Arrow-Wood Family)
Sanguisorba minor -- see -- Poterium sanguisorba
	*Sarcobatus* (Greasewood) Sarcobataceae (See Sarcobataceae) (Greasewood Family)
	*Sarcobatus vermiculatus* (Greasewood) Sarcobataceae (Greasewood Family)
Satureja vulgaris -- see -- Clinopodium vulgare
	*Saxifraga adscendens* (Saxifrage, Wedge-leaf) Saxifragaceae (Saxifrage Family)
	*Saxifraga austromontana* (Saxifrage, Spotted) Saxifragaceae (Saxifrage Family)
Saxifraga bronchialis ssp. austromontana -- see -- Saxifraga austromontana
	*Saxifraga cernua* (Saxifrage, Nodding) Saxifragaceae (Saxifrage Family)
	*Saxifraga chrysantha* (Saxifrage, Golden) Saxifragaceae (Saxifrage Family)
Saxifraga debilis -- see -- Saxifraga hyperborea
	**Saxifraga flagellaris ssp. crandallii (Saxifrage, Whiplash) Saxifragaceae (Saxifrage Family**)
	*Saxifraga hyperborea* (Saxifrage, Pygmy) Saxifragaceae (Saxifrage Family)
Saxifraga odontoloma -- see -- Micranthes odontoloma
Saxifraga oregana -- see -- Micranthes oregana
Saxifraga rhomboidea -- see -- Micranthes rhomboidea
Saxifraga rivularis -- see -- Saxifraga hyperborea
	*Scabrethia scabra* (Mule's Ears, Desert) Asteraceae (aka Compositae) (Sunflower Family)
Schizotechium jamesianum -- see -- Torreyostellaria jamesiana
Schkuhria multiflora -- see -- Picradeniopsis multiflora
Schoenocrambe linifolia -- see -- Sisymbrium linifolium
Sclerocactus cloverae -- see -- Sclerocactus cloveriae ssp. brackii
	**Sclerocactus cloveriae ssp. brackii (Cactus, Clover's Fishhook; Cactus, Brack's Fishhook) Cactaceae (Cactus Family**)
	*Sclerocactus glaucus* (Cactus, Gray Fishhook; Cactus, Uinta Basin Fishhook) Cactaceae (Cactus Family)
	*Sclerocactus mesae-verdae* (Cactus, Mesa Verde Fishhook) Cactaceae (Cactus Family)
	*Sclerocactus parviflorus* (Cactus, Small-flower Fishhook) Cactaceae (Cactus Family)
Sclerocactus parviflorus -- see -- Sclerocactus cloveriae ssp. brackii
	*Sclerocactus whipplei* (Cactus, Whipple's Fishhook) Cactaceae (Cactus Family)
	*Scorzonera laciniata* (Viper Grass) Asteraceae (aka Compositae) (Sunflower Family)
	*Scrophularia lanceolata* (Figwort) Scrophulariaceae (Snapdragon Family)
	*Scutellaria galericulata* (Skullcap) Lamiaceae (aka Labiatae) (Mint Family)
	*Sedum lanceolatum* (Stonecrop, Yellow) Crassulaceae (Stonecrop Family)
	**Senecio amplectens var. amplectens (Ragwort, Showy) Asteraceae (aka Compositae) (Sunflower Family**)
	**Senecio amplectens var. holmii (Ragwort, Holm's) Asteraceae (aka Compositae) (Sunflower Family**)
	*Senecio atratus* (Ragwort, Black-tipped) Asteraceae (aka Compositae) (Sunflower Family)
	**Senecio bigelovii var. hallii (Ragwort, Nodding) Asteraceae (aka Compositae) (Sunflower Family**)
	*Senecio blitoides* (Ragwort, Alpine; Ragwort, Fremont's) Asteraceae (aka Compositae) (Sunflower Family)
Senecio castoreus -- see -- Packera castoreus
	*Senecio crassulus* (Ragwort, Thick-leaf) Asteraceae (aka Compositae) (Sunflower Family)
Senecio crocatus -- see -- Packera crocata
Senecio dimorphophyllus -- see -- Packera dimorphophylla
Senecio douglasii -- see -- Senecio flaccidus var. flaccidus
	**Senecio eremophilus var. kingii (Ragwort, Lonely; Ragwort, Desert) Asteraceae (aka Compositae) (Sunflower Family**)
	**Senecio flaccidus var. flaccidus (Ragwort, Thread-leaf) Asteraceae (aka Compositae) (Sunflower Family**)
Senecio fremontii variety blitoides -- see -- Senecio blitoides
Senecio fremontii variety inexpectatus -- see -- Senecio inexpectatus
Senecio holmii -- see -- Senecio amplectens var. holmii
	*Senecio inexpectatus* (Ragwort, Prickly; Ragwort,Unexpected) Asteraceae (aka Compositae) (Sunflower Family)
	**Senecio integerrimus var. exaltatus (Ragwort, Lamb's Tongue) Asteraceae (aka Compositae) (Sunflower Family**)
Senecio longilobus -- see -- Senecio flaccidus var. flaccidus
Senecio multilobatus -- see -- Packera multilobata
Senecio neomexicanus -- see -- Packera neomexicana var. mutabilis
Senecio pseudaureus -- see -- Packera pseudaurea
	**Senecio serra var. admirabilis (Ragwort, Serrated) Asteraceae (aka Compositae) (Sunflower Family**)
	*Senecio soldanella* (Ragwort, Colorado) Asteraceae (aka Compositae) (Sunflower Family)
	*Senecio spartioides* (Ragwort, Broom) Asteraceae (aka Compositae) (Sunflower Family)
	*Senecio triangularis* (Ragwort, Triangular) Asteraceae (aka Compositae) (Sunflower Family)
Senecio werneriifolius -- see -- Packera werneriifolia
	*Senecio wootonii* (Ragwort, Wooton's) Asteraceae (aka Compositae) (Sunflower Family)
Seriphidium novum -- see -- Artemisia nova
Seriphidium tridentata -- see -- Artemisia tridentata subspecies tridentata
	*Shepherdia argentea* (Buffaloberry, Silver) Elaeagnaceae (Oleaster Family)
	*Shepherdia canadensis* (Buffaloberry, Canada) Elaeagnaceae (Oleaster Family)
	*Shepherdia rotundifolia* (Buffaloberry, Round Leaf) Elaeagnaceae (Oleaster Family)
	*Sibbaldia procumbens* (Sibbaldia) Rosaceae (Rose Family)
	*Sidalcea candida* (Checkermallow, White) Malvaceae (Mallow Family)
	**Sidalcea neomexicana ssp. neomexicana (Checkermallow, Pink) Malvaceae (Mallow Family**)
	**Silene acaulis var. subacaulescens (Moss Campion) Caryophyllaceae (Pink Family**)
	*Silene antirrhina* (Catchfly, Sleepy) Caryophyllaceae (Pink Family)
	*Silene drummondii* (Catchfly, Drummond's) Caryophyllaceae (Pink Family)
	*Silene menziesii* (Catchfly, Menzies') Caryophyllaceae (Pink Family)
	*Sisymbrium altissimum* (Mustard, Jim Hill; Tumblemustard, Tall) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Sisymbrium linifolium* (Mustard, Flaxleaf) Brassicaceae (aka Cruciferae) (Mustard Family)
	**Sisyrinchium montanum var. montanum (Blue-eyed Grass) Iridaceae (Iris Family**)
	*Sium suave* (Water-parsnip, Hemlock) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Smelowskia americana* (Smelowsky, American) Brassicaceae (aka Cruciferae) (Mustard Family)
Smelowskia calycina var. americana -- see -- Smelowskia americana
Smilacina racemosa -- see -- Maianthemum amplexicaule
	*Solanum triflorum* (Cutleaf Nightshade) Solanaceae (Nightshade Family)
	*Solidago glutinosa* (Goldenrod, Sticky) Asteraceae (aka Compositae) (Sunflower Family)
	*Solidago missouriensis* (Goldenrod, Missouri) Asteraceae (aka Compositae) (Sunflower Family)
	**Solidago multiradiata var. scopulorum (Goldenrod, Rocky Mountain) Asteraceae (aka Compositae) (Sunflower Family**)
	*Solidago nana* (Goldenrod, Dwarf) Asteraceae (aka Compositae) (Sunflower Family)
Solidago parryi -- see -- Oreochrysum parryi
Solidago simplex var. simplex -- see -- Solidago glutinosa
Solidago sparsiflora -- see -- Solidago velutina
	*Solidago velutina* (Goldenrod, Velvet) Asteraceae (aka Compositae) (Sunflower Family)
	**Sonchus arvensis ssp. uliginosus (Sow-thistle, Field) Asteraceae (aka Compositae) (Sunflower Family**)
	*Sonchus asper* (Sow-thistle, spiny) Asteraceae (aka Compositae) (Sunflower Family)
Sonchus uliginosus -- see -- Sonchus arvensis ssp. uliginosus
	*Sophora nuttalliana* (Sophora, Nuttall's) Fabaceae (aka Leguminosae) (Pea Family)
	*Sophora stenophylla* (Sophora, Silvery) Fabaceae (aka Leguminosae) (Pea Family)
	*Sorbus scopulina* (Ash, Mountain; Rowan Tree) Rosaceae (Rose Family)
	*Sparganium angustifolium* (Burreed) Typhaceae (Cattail Family)
	*Spergularia rubra* (Spurrey, Sand) Caryophyllaceae (Pink Family)
Spergulastrum lanuginosum -- see -- Arenaria lanuginosa ssp. saxosa
	*Sphaeralcea coccinea* (Globemallow, Scarlet) Malvaceae (Mallow Family)
	*Sphaeralcea fendleri* (Globemallow, Fendler's) Malvaceae (Mallow Family)
	*Sphaeralcea grossulariifolia* (Globemallow, Gooseberry-leaf) Malvaceae (Mallow Family)
	*Sphaeralcea leptophylla* (Globemallow, Slender-leaf) Malvaceae (Mallow Family)
	*Sphaeralcea parvifolia* (Globemallow, Small-leaf) Malvaceae (Mallow Family)
	*Spiranthes romanzoffiana* (Ladies' Tresses) Orchidaceae (Orchid Family)
	*Stanleya pinnata* (Prince's Plume) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Stellaria irrigua* (Starwort, Umbrella) Caryophyllaceae (Pink Family)
Stellaria irrigua -- see -- Stellaria sanjuanensis
	*Stellaria longifolia* (Starwort, Long-leaf) Caryophyllaceae (Pink Family)
	**Stellaria longipes ssp. longipes (Starwort, Long-stalked) Caryophyllaceae (Pink Family**)
	*Stellaria sanjuanensis* (Starwort, Colorado) Caryophyllaceae (Pink Family)
Stellaria umbellata -- see -- Stellaria irrigua
	*Stenogonum flexum* (Buckwheat, Flexible) Polygonaceae (Buckwheat Family)
	*Stenogonum salsuginosum* (Buckwheat, Salty) Polygonaceae (Buckwheat Family)
	**Stenotus armerioides var. armerioides (Goldenweed; Sunflower, Ring Grass) Asteraceae (aka Compositae) (Sunflower Family**)
	**Stephanomeria exigua ssp. exigua (Wirelettuce, Whiteplume) Asteraceae (aka Compositae) (Sunflower Family**)
	*Stephanomeria pauciflora* (Wirelettuce, Few-flowered) Asteraceae (aka Compositae) (Sunflower Family)
	*Stephanomeria tenuifolia* (Wirelettuce, Slender-leaf) Asteraceae (aka Compositae) (Sunflower Family)
Streptanthella longirostris -- see -- Streptanthus longirostris
	**Streptanthus cordatus var. cordatus (Twistflower, Heartleaf; Jewelflower, Heartleaf) Brassicaceae (aka Cruciferae) (Mustard Family**)
	*Streptanthus longirostris* (Twistflower, Little) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Streptopus amplexifolius* (Twistedstalk) Liliaceae (Lily Family)
Streptopus fassettii -- see -- Streptopus amplexifolius
	*Strigosella africana* (Mustard, African) Brassicaceae (aka Cruciferae) (Mustard Family)
Swertia albomarginata -- see -- Frasera albomarginata
Swertia paniculata -- see -- Frasera paniculata
	*Swertia perennis* (Gentian, Star) Gentianaceae (Gentian Family)
Swertia radiata -- see -- Frasera speciosa
Swida sericea -- see -- Cornus alba ssp. stolonifera
	*Symphoricarpos longiflorus* (Snowberry, Long-flowered) Caprifoliaceae (Honeysuckle Family)
Symphoricarpos oreophilus -- see -- Symphoricarpos rotundifolius
	*Symphoricarpos rotundifolius* (Snowberry, Round-leaf) Caprifoliaceae (Honeysuckle Family)
	*Symphyotrichum ascendens* (Aster, Western) Asteraceae (aka Compositae) (Sunflower Family)
	**Symphyotrichum ericoides var. ericoides (Aster, Heather) Asteraceae (aka Compositae) (Sunflower Family**)
	**Symphyotrichum falcatum var. falcatum (Aster, Sickle; Aster, White Prairie) Asteraceae (aka Compositae) (Sunflower Family**)
	**Symphyotrichum foliaceum var. apricum (Aster, Leafy) Asteraceae (aka Compositae) (Sunflower Family**)
	**Symphyotrichum foliaceum var. canbyi (Aster, Leafy) Asteraceae (aka Compositae) (Sunflower Family**)
	**Symphyotrichum foliaceum var. parryi (Aster, Leafy) Asteraceae (aka Compositae) (Sunflower Family**)
	*Symphyotrichum lanceolatum subspecies hesperium* (Aster, White Panicled) Asteraceae (aka Compositae) (Sunflower Family)
	**Symphyotrichum spathulatum var. spathulatum (Aster, Spatula; Aster, Western Mountain) Asteraceae (aka Compositae) (Sunflower Family**)
Synthyris alpina -- see -- Veronica besseya
Synthyris plantaginea -- see -- Veronica plantaginea
Synthyris ritteriana -- see -- Veronica ritteriana

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Talinum brevifolium -- see -- Phemeranthus brevifolius
Talinum parviflorus -- see -- Phemeranthus confertiflorus
	*Tamarix chinensis* (Tamarisk; Saltcedar) Tamaricaceae (Tamarisk Family)
Tamarix ramosissima -- see -- Tamarix chinensis
Tanacetum vulgare -- see -- Leucanthemum vulgare
	*Taraxacum ceratophorum* (Dandelion, Horned Alpine) Asteraceae (aka Compositae) (Sunflower Family)
Taraxacum eriophorum -- see -- Taraxacum ceratophorum
Taraxacum lyratum -- see -- Taraxacum scopulorum
	*Taraxacum officinale* (Dandelion) Asteraceae (aka Compositae) (Sunflower Family)
	*Taraxacum scopulorum* (Dandelion, Alpine) Asteraceae (aka Compositae) (Sunflower Family)
Taraxcum ovinum -- see -- Taraxacum ceratophorum
	*Tetradymia canescens* (Horsebrush, Gray) Asteraceae (aka Compositae) (Sunflower Family)
	*Tetradymia spinosa* (Horsebrush, Cat-claw) Asteraceae (aka Compositae) (Sunflower Family)
	**Tetraneuris acaulis var. arizonica (Woolly Base, Stemless; Daisy, Stemless Four-nerved) Asteraceae (aka Compositae) (Sunflower Family**)
Tetraneuris grandiflora -- see -- Hymenoxys grandiflora
	*Tetraneuris ivesiana* (Perky Sue; Daisy, Ives' Four-nerved) Asteraceae (aka Compositae) (Sunflower Family)
	*Tetraneuris torreyana* (Wooly Base, Torrey's) Asteraceae (aka Compositae) (Sunflower Family)
	*Thalictrum alpinum* (Meadowrue, Alpine) Ranunculaceae (Buttercup Family)
	**Thalictrum fendleri var. fendleri (Meadowrue, Fendler's) Ranunculaceae (Buttercup Family**)
	*Thelypodiopsis aurea* (Mustard, Durango Tumble) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Thelypodium integrifolium* (Thelypody, Entire-leaf) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Thelypodium laxiflorum* (Thelypody, Loose-flowered) Brassicaceae (aka Cruciferae) (Mustard Family)
	**Thermopsis montana var. montana (Golden Banner, Mountain) Fabaceae (aka Leguminosae) (Pea Family**)
	*Thermopsis rhombifolia* (Golden Banner) Fabaceae (aka Leguminosae) (Pea Family)
Thermopsis rhombifolia var. montana -- see -- Thermopsis montana var. montana
Thlaspi montanum -- see -- Noccaea fendleri ssp. glauca
	*Tiquilia latior* (Crinklemat) Boraginaceae (Forget-Me-Not Family)
Tithymalus brachycera -- see -- Euphorbia brachycera
	*Tomostima cuneifolia* (Stonecress, Wedge-leaf) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Tomostima reptans* (Whitlow Grass, Carolina; Stonecress, Carolina) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Tonestus pygmaeus* (Serpentweed, Pygmy) Asteraceae (aka Compositae) (Sunflower Family)
	*Torreyostellaria jamesiana* (Starwort, Tuber) Caryophyllaceae (Pink Family)
	*Townsendia annua* (Townsendia, Annual; Daisy, Annual Townsendia) Asteraceae (aka Compositae) (Sunflower Family)
	*Townsendia exscapa* (Townsendia, Stemless) Asteraceae (aka Compositae) (Sunflower Family)
	*Townsendia glabella* (Townsendia, Oyster Bed) Asteraceae (aka Compositae) (Sunflower Family)
	*Townsendia incana* (Daisy, Silvery Townsendia; Daisy, Easter) Asteraceae (aka Compositae) (Sunflower Family)
	*Townsendia leptotes* (Townsendia, Slender-leaf) Asteraceae (aka Compositae) (Sunflower Family)
	*Townsendia rothrockii* (Townsendia, Rothrock's) Asteraceae (aka Compositae) (Sunflower Family)
Toxicodendron radicans var. rydbergii -- see -- Toxicodendron rydbergii
	*Toxicodendron rydbergii* (Poison Ivy) Anacardiaceae (Sumac Family)
	*Toxicoscordion* (Camas, Death) Liliaceae (See Melanthiaceae) (False Hellebore Family)
	*Toxicoscordion paniculatum* (Camas, Desert Death) Melanthiaceae (False Hellebore Family)
	**Toxicoscordion venenosum var. gramineum (Camas, Foothills Death) Melanthiaceae (False Hellebore Family**)
	*Tradescantia occidentalis* (Spiderwort) Commelinaceae (Spiderwort Family)
	*Tragopogon dubius* (Salsify, Common; Goatsbeard, Yellow) Asteraceae (aka Compositae) (Sunflower Family)
Tragopogon lamottei -- see -- Tragopogon pratensis
	*Tragopogon porrifolius* (Salsify, Leek-leaved) Asteraceae (aka Compositae) (Sunflower Family)
	*Tragopogon pratensis* (Salsify, Meadow) Asteraceae (aka Compositae) (Sunflower Family)
	**Trautvetteria caroliniensis var. occidentalis (Tasselrue) Ranunculaceae (Buttercup Family**)
	*Tribulus terrestris* (Puncture Vine; Goathead) Zygophyllaceae (Caltrop Family)
	*Trifolium attenuatum* (Clover, Rocky Mountain) Fabaceae (aka Leguminosae) (Pea Family)
	*Trifolium brandegeei* (Clover, Brandegee's) Fabaceae (aka Leguminosae) (Pea Family)
	*Trifolium dasyphyllum* (Clover, Hairy-leaf) Fabaceae (aka Leguminosae) (Pea Family)
	**Trifolium gymnocarpon ssp. gymnocarpon (Clover, Holly Leaf) Fabaceae (aka Leguminosae) (Pea Family**)
	*Trifolium hybridum* (Clover, Alsike) Fabaceae (aka Leguminosae) (Pea Family)
	*Trifolium longipes* (Clover, Long-stalked) Fabaceae (aka Leguminosae) (Pea Family)
	*Trifolium nanum* (Clover, Dwarf) Fabaceae (aka Leguminosae) (Pea Family)
	**Trifolium parryi ssp. parryi (Clover, Parry's) Fabaceae (aka Leguminosae) (Pea Family**)
	*Trifolium pratense* (Clover, Red) Fabaceae (aka Leguminosae) (Pea Family)
	*Trifolium repens* (Clover, White) Fabaceae (aka Leguminosae) (Pea Family)
	*Triglochin maritima* (Arrowgrass) Juncaginaceae (Arrowgrass Family)
Trimorpha lonchophylla -- see -- Erigeron lonchophyllus
	*Triteleia grandiflora* (Hyacinth, Wild; Onion, Large-flowered) Asparagaceae (Asparagus Family)
	*Trollius albiflorus* (Globe Flower) Ranunculaceae (Buttercup Family)
Trollius laxus ssp. albiflorus -- see -- Trollius albiflorus
Tryphane rubella -- see -- Sabulina rubella
	*Turritis glabra* (Tower Mustard) Brassicaceae (aka Cruciferae) (Mustard Family)
	*Typha latifolia* (Cattail) Typhaceae (Cattail Family)

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	*Ulmus pumila* (Elm, Siberian) Ulmaceae (Elm Family)
	**Urtica dioica ssp. gracilis (Nettle, Stinging) Urticaceae (Nettle Family**)
Urtica gracilis -- see -- Urtica dioica ssp. gracilis
	*Utricularia macrorhiza* (Bladderwort, Greater) Lentibulariaceae (Bladderwort Family)
	*Utricularia minor* (Bladderwort, Lesser) Lentibulariaceae (Bladderwort Family)

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---V---
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	*Vaccinium myrtillus* (Blueberry; Whortleberry; Bilberry) Ericaceae (Heath Family)
	*Valeriana acutiloba* (Valerian) Caprifoliaceae (Honeysuckle Family)
Valeriana capitata -- see -- Valeriana acutiloba
	**Valeriana edulis var. edulis (Valerian, Edible) Caprifoliaceae (Honeysuckle Family**)
	*Valeriana occidentalis* (Western Valerian) Caprifoliaceae (Honeysuckle Family)
	**Veratrum californicum var. californicum (Lily, Corn; Hellebore, False; Cabbage, Skunk) Melanthiaceae (False Hellebore Family**)
Veratrum tenuipetalum -- see -- Veratrum californicum var. californicum
	*Verbascum thapsus* (Mullein) Scrophulariaceae (Snapdragon Family)
Verbena bipinnatifida -- see -- Glandularia wrightii
Verbena wrightii -- see -- Glandularia wrightii
	**Verbesina encelioides var. exauriculata (Crownbeard, Cowpen Daisy) Asteraceae (aka Compositae) (Sunflower Family**)
	*Veronica* (Veronica) Scrophulariaceae (Also see Plantaginaceae) (Plantain Family)
	*Veronica americana* (Brookline, American) Plantaginaceae (Plantain Family)
	*Veronica anagallis-aquatica* (Speedwell, Water) Plantaginaceae (Plantain Family)
	*Veronica besseya* (Kitten Tails, Alpine; Coral Drops, Alpine) Plantaginaceae (Plantain Family)
Veronica nutans -- see -- Veronica wormskjoldii ssp. nutans
	**Veronica peregrina ssp. xalapensis (Speedwell, Purslane) Plantaginaceae (Plantain Family**)
	*Veronica plantaginea* (Coral Drops, White River; Kitten Tails, White River) Plantaginaceae (Plantain Family)
	*Veronica ritteriana* (Kitten Tails, Ritters'; Coral Drops, Ritters') Plantaginaceae (Plantain Family)
	**Veronica serpyllifolia ssp. humifusa (Speedwell, Thyme-leaf) Plantaginaceae (Plantain Family**)
	**Veronica wormskjoldii ssp. nutans (Veronica; Speedwell, Western) Plantaginaceae (Plantain Family**)
Veronicastrum serpyllifolium -- see -- Veronica serpyllifolia ssp. humifusa
	*Vesper bulbosus* (Biscuitroot, Spring; Parsley, Bulbous Spring) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Vesper constancei* (Biscuitroot, Wide-winged; Parsley, Constance's Spring) Apiaceae (aka Umbelliferae) (Parsley Family)
	*Vicia americana* (Vetch, American) Fabaceae (aka Leguminosae) (Pea Family)
	*Viola adunca* (Blue Violet) Violaceae (Violet Family)
Viola adunca -- see -- Viola adunca var. bellidifolia
	**Viola adunca var. bellidifolia (Alpine Blue Violet) Violaceae (Violet Family**)
Viola canadensis var. rugulosa -- see -- Viola rugulosa
Viola canadensis var. scopulorum -- see -- Viola scopulorum
	*Viola macloskeyi* (Macloskey's Violet; Smooth White Violet) Violaceae (Violet Family)
Viola minuscula -- see -- Viola macloskeyi
	*Viola nephrophylla* (Violet, Bog) Violaceae (Violet Family)
Viola palustris -- see -- Viola macloskeyi
	*Viola rugulosa* (Canada Violet) Violaceae (Violet Family)
Viola rugulosa -- see -- Viola scopulorum
Viola rydbergi -- see -- Viola rugulosa
Viola rydbergi -- see -- Viola scopulorum
	*Viola scopulorum* (Canada Violet) Violaceae (Violet Family)
Viola scopulorum -- see -- Viola rugulosa
Viola sororia -- see -- Viola nephrophylla
	*Viola vallicola* (Violet, Valley; Violet, Yellow) Violaceae (Violet Family)
Virgulus ericoides -- see -- Symphyotrichum ericoides var. ericoides
Virgulus falcatus -- see -- Symphyotrichum falcatum var. falcatum

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---W---
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	*Wyethia arizonica* (Mule's Ears, Arizona) Asteraceae (aka Compositae) (Sunflower Family)
Wyethia scabra -- see -- Scabrethia scabra
	*Wyethia ×magna* (Mule's Ears) Asteraceae (aka Compositae) (Sunflower Family)

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	*Xanthisma coloradoense* (Aster, Colorado Tansy) Asteraceae (aka Compositae) (Sunflower Family)
	**Xanthisma grindelioides var. grindelioides (Goldenweed, Saw-toothed) Asteraceae (aka Compositae) (Sunflower Family**)
	**Xanthisma spinulosum var. paradoxum (Goldenweed, Woolly) Asteraceae (aka Compositae) (Sunflower Family**)
	**Xanthisma spinulosum var. spinulosum (Goldenweed, Woolly) Asteraceae (aka Compositae) (Sunflower Family**)
Ximenesia encelioides -- see -- Verbesina encelioides var. exauriculata

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---Y---
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	**Yucca angustissima var. angustissima (Yucca, Narrow Leaf) Asparagaceae (Asparagus Family**)
	**Yucca baccata var. baccata (Yucca, Broad Leaf; Yucca, Banana) Asparagaceae (Asparagus Family**)
	**Yucca baileyi var. baileyi (Yucca, Bailey's Narrow Leaf) Asparagaceae (Asparagus Family**)
	**Yucca harrimaniae var. harrimaniae (Yucca, Harriman's Narrow Leaf) Asparagaceae (Asparagus Family**)

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---Z---
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Zigadenus -- see -- Toxicoscordion
Zigadenus elegans -- see -- Anticlea elegans
Zigadenus paniculatus -- see -- Toxicoscordion paniculatum
Zigadenus venonosus -- see -- Toxicoscordion venenosum var. gramineum
Zuckia brandegeei -- see -- Grayia brandegeei

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