List of Utah Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| Abajo fleabane | Erigeron abajoensis | ERAB3 | Asteraceae | Dicot |
| absinthium | Artemisia absinthium | ARAB3 | Asteraceae | Dicot |
| acacia | Acacia | ACACI | Fabaceae | Dicot |
| achyronychia | Achyronychia | ACHYR3 | Caryophyllaceae | Dicot |
| Adonis blazingstar | Mentzelia multiflora | MEMU3 | Loasaceae | Dicot |
| Adonis blazingstar | Mentzelia multiflora var. integra | MEMUI | Loasaceae | Dicot |
| Adonis blazingstar | Mentzelia multiflora var. longiloba | MEMUL2 | Loasaceae | Dicot |
| Adonis blazingstar | Mentzelia multiflora var. multiflora | MEMUM2 | Loasaceae | Dicot |
| adoxa | Adoxa | ADOXA | Adoxaceae | Dicot |
| African mustard | Malcolmia africana | MAAF | Brassicaceae | Dicot |
| agave | Agave | AGAVE | Agavaceae | Monocot |
| agoseris | Agoseris | AGOSE | Asteraceae | Dicot |
| ailanthus | Ailanthus | AILAN | Simaroubaceae | Dicot |
| Aladdin"s slippers | Astragalus amphioxys var. vespertinus | ASAMV | Fabaceae | Dicot |
| albizia | Albizia | ALBIZ | Fabaceae | Dicot |
| alcove bog orchid | Platanthera zothecina | PLZO | Orchidaceae | Monocot |
| alcove rockdaisy | Perityle specuicola | PESP5 | Asteraceae | Dicot |
| alder | Alnus | ALNUS | Betulaceae | Dicot |
| alderleaf buckthorn | Rhamnus alnifolia | RHAL | Rhamnaceae | Dicot |
| alderleaf mountain mahogany | Cercocarpus montanus | CEMO2 | Rosaceae | Dicot |
| alderleaf mountain mahogany | Cercocarpus montanus var. montanus | CEMOM4 | Rosaceae | Dicot |
| Aleutian maidenhair | Adiantum aleuticum | ADAL | Pteridaceae | Fern |
| alfalfa | Medicago | MEDIC | Fabaceae | Dicot |
| alfalfa | Medicago sativa | MESA | Fabaceae | Dicot |
| alfalfa | Medicago sativa ssp. sativa | MESAS | Fabaceae | Dicot |
| alfalfa dodder | Cuscuta approximata | CUAP2 | Cuscutaceae | Dicot |
| alhagi | Alhagi | ALHAG | Fabaceae | Dicot |
| aliciella | Aliciella | ALICI | Polemoniaceae | Dicot |
| alkali buttercup | Ranunculus cymbalaria | RACY | Ranunculaceae | Dicot |
| alkali cordgrass | Spartina gracilis | SPGR | Poaceae | Monocot |
| alkali cusickiella | Cusickiella douglasii | CUDO3 | Brassicaceae | Dicot |
| alkali goldenbush | Isocoma acradenia | ISAC2 | Asteraceae | Dicot |
| alkali goldenbush | Isocoma acradenia var. eremophila | ISACE2 | Asteraceae | Dicot |
| alkali mallow | Malvella leprosa | MALE3 | Malvaceae | Dicot |
| alkali marsh aster | Almutaster | ALMUT2 | Asteraceae | Dicot |
| alkali marsh aster | Almutaster pauciflorus | ALPA14 | Asteraceae | Dicot |
| alkali pepperweed | Lepidium crenatum | LECR12 | Brassicaceae | Dicot |
| alkali pepperweed | Lepidium dictyotum | LEDI2 | Brassicaceae | Dicot |
| alkali pepperweed | Lepidium dictyotum var. dictyotum | LEDID | Brassicaceae | Dicot |
| alkali sacaton | Sporobolus airoides | SPAI | Poaceae | Monocot |
| alkali swainsonpea | Sphaerophysa salsula | SPSA3 | Fabaceae | Dicot |
| alkali wildrye | Leymus simplex | LESI5 | Poaceae | Monocot |
| alkali yellowtops | Flaveria campestris | FLCA | Asteraceae | Dicot |
| alkaligrass | Puccinellia | PUCCI | Poaceae | Monocot |
| alkaliweed | Cressa | CRESS | Convolvulaceae | Dicot |
| allenrolfea | Allenrolfea | ALLEN | Chenopodiaceae | Dicot |
| alliaria | Alliaria | ALLIA | Brassicaceae | Dicot |
| alpine bedstraw | Galium hypotrichium | GAHY | Rubiaceae | Dicot |
| alpine bentgrass | Agrostis humilis | AGHU | Poaceae | Monocot |
| alpine besseya | Besseya alpina | BEAL | Scrophulariaceae | Dicot |
| alpine biscuitroot | Lomatium graveolens var. alpinum | LOGRA | Apiaceae | Dicot |
| alpine bistort | Polygonum viviparum | POVI3 | Polygonaceae | Dicot |
| alpine bladderpod | Lesquerella alpina | LEAL | Brassicaceae | Dicot |
| alpine bladderpod | Lesquerella alpina var. alpina | LEALA5 | Brassicaceae | Dicot |
| alpine bluegrass | Poa alpina | POAL2 | Poaceae | Monocot |
| alpine buttercup | Ranunculus adoneus | RAAD | Ranunculaceae | Dicot |
| alpine buttercup | Ranunculus adoneus var. adoneus | RAADA2 | Ranunculaceae | Dicot |
| alpine buttercup | Ranunculus adoneus var. alpinus | RAADA | Ranunculaceae | Dicot |
| alpine clover | Trifolium dasyphyllum | TRDA2 | Fabaceae | Dicot |
| alpine collomia | Collomia debilis | CODE | Polemoniaceae | Dicot |
| alpine collomia | Collomia debilis var. debilis | CODED | Polemoniaceae | Dicot |
| alpine dustymaiden | Chaenactis douglasii var. alpina | CHDOA2 | Asteraceae | Dicot |
| alpine false springparsley | Pseudocymopterus montanus | PSMO | Apiaceae | Dicot |
| alpine fescue | Festuca brachyphylla | FEBR | Poaceae | Monocot |
| alpine forget-me-not | Eritrichium | ERITR | Boraginaceae | Dicot |
| alpine hymenopappus | Hymenopappus filifolius var. nudipes | HYFIN2 | Asteraceae | Dicot |
| alpine Jacob"s-ladder | Polemonium foliosissimum var. alpinum | POFOA2 | Polemoniaceae | Dicot |
| alpine ladyfern | Athyrium americanum | ATAM | Dryopteridaceae | Fern |
| alpine laurel | Kalmia microphylla | KAMI | Ericaceae | Dicot |
| alpine leafybract aster | Symphyotrichum foliaceum | SYFO2 | Asteraceae | Dicot |
| alpine leafybract aster | Symphyotrichum foliaceum var. apricum | SYFOA | Asteraceae | Dicot |
| alpine lewisia | Lewisia pygmaea | LEPY2 | Portulacaceae | Dicot |
| Alpine Meadow-Foxtail | Alopecurus magellanicus | ALMA8 | Poaceae | Monocot |
| alpine meadow-rue | Thalictrum alpinum | THAL | Ranunculaceae | Dicot |
| alpine milkvetch | Astragalus alpinus | ASAL7 | Fabaceae | Dicot |
| alpine milkvetch | Astragalus alpinus var. alpinus | ASALA4 | Fabaceae | Dicot |
| alpine mountainsorrel | Oxyria digyna | OXDI3 | Polygonaceae | Dicot |
| alpine nerve sedge | Carex neurophora | CANE6 | Cyperaceae | Monocot |
| alpine oatgrass | Helictotrichon | HELIC | Poaceae | Monocot |
| alpine oreoxis | Oreoxis alpina | ORAL | Apiaceae | Dicot |
| alpine oreoxis | Oreoxis alpina ssp. alpina | ORALA | Apiaceae | Dicot |
| alpine pennycress | Noccaea fendleri ssp. glauca | NOFEG | Brassicaceae | Dicot |
| alpine pepperweed | Lepidium montanum var. alpinum | LEMOA | Brassicaceae | Dicot |
| alpine pondweed | Potamogeton alpinus | POAL8 | Potamogetonaceae | Monocot |
| alpine sagebrush | Artemisia scopulorum | ARSC | Asteraceae | Dicot |
| alpine sheep sorrel | Rumex paucifolius | RUPA6 | Polygonaceae | Dicot |
| alpine sheep sorrel | Rumex paucifolius ssp. paucifolius | RUPAP | Polygonaceae | Dicot |
| alpine shootingstar | Dodecatheon alpinum | DOAL | Primulaceae | Dicot |
| alpine shootingstar | Dodecatheon alpinum ssp. alpinum | DOALA | Primulaceae | Dicot |
| alpine shootingstar | Dodecatheon alpinum ssp. majus | DOALM | Primulaceae | Dicot |
| alpine smelowskia | Smelowskia calycina | SMCA | Brassicaceae | Dicot |
| alpine spicywintergreen | Gaultheria humifusa | GAHU | Ericaceae | Dicot |
| alpine springbeauty | Claytonia megarhiza | CLME | Portulacaceae | Dicot |
| alpine springbeauty | Claytonia megarhiza var. megarhiza | CLMEM | Portulacaceae | Dicot |
| alpine timothy | Phleum alpinum | PHAL2 | Poaceae | Monocot |
| alpine waterleaf | Hydrophyllum capitatum var. alpinum | HYCAA | Hydrophyllaceae | Dicot |
| alpine willow | Salix petrophila | SAPE18 | Salicaceae | Dicot |
| alpine yellowcress | Rorippa alpina | ROAL | Brassicaceae | Dicot |
| alpineflames | Pyrrocoma apargioides | PYAP2 | Asteraceae | Dicot |
| alpinegold | Hulsea | HULSE | Asteraceae | Dicot |
| alplily | Lloydia | LLOYD | Liliaceae | Monocot |
| alsike clover | Trifolium hybridum | TRHY | Fabaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| alumroot brookfoam | Telesonix heucheriformis | TEHE5 | Saxifragaceae | Dicot |
| alyssum | Alyssum simplex | ALSI8 | Brassicaceae | Dicot |
| alyssum evening primrose | Camissonia boothii ssp. alyssoides | CABOA | Onagraceae | Dicot |
| amberboa | Amberboa | AMBER | Asteraceae | Dicot |
| American alpine speedwell | Veronica wormskjoldii | VEWO2 | Scrophulariaceae | Dicot |
| American alpine speedwell | Veronica wormskjoldii var. wormskjoldii | VEWOW | Scrophulariaceae | Dicot |
| American beech | Fagus grandifolia | FAGR | Fagaceae | Dicot |
| American bistort | Polygonum bistortoides | POBI6 | Polygonaceae | Dicot |
| American bugseed | Corispermum americanum | COAM8 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. americanum | COAMA2 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. rydbergii | COAMR | Chenopodiaceae | Dicot |
| American common reed | Phragmites australis ssp. americanus | PHAUA6 | Poaceae | Monocot |
| American dragonhead | Dracocephalum parviflorum | DRPA2 | Lamiaceae | Dicot |
| American dwarf mistletoe | Arceuthobium americanum | ARAM | Viscaceae | Dicot |
| American false candytuft | Smelowskia calycina var. americana | SMCAA | Brassicaceae | Dicot |
| American globeflower | Trollius laxus | TRLA14 | Ranunculaceae | Dicot |
| American globeflower | Trollius laxus ssp. albiflorus | TRLAA2 | Ranunculaceae | Dicot |
| American licorice | Glycyrrhiza lepidota | GLLE3 | Fabaceae | Dicot |
| American mannagrass | Glyceria grandis | GLGR | Poaceae | Monocot |
| American mannagrass | Glyceria grandis var. grandis | GLGRG | Poaceae | Monocot |
| American plum | Prunus americana | PRAM | Rosaceae | Dicot |
| American red raspberry | Rubus idaeus | RUID | Rosaceae | Dicot |
| American red raspberry | Rubus idaeus ssp. idaeus | RUIDI | Rosaceae | Dicot |
| American rockbrake | Cryptogramma acrostichoides | CRAC3 | Pteridaceae | Fern |
| American sloughgrass | Beckmannia syzigachne | BESY | Poaceae | Monocot |
| American speedwell | Veronica americana | VEAM2 | Scrophulariaceae | Dicot |
| American spikenard | Aralia racemosa | ARRA | Araliaceae | Dicot |
| American spikenard | Aralia racemosa ssp. bicrenata | ARRAB2 | Araliaceae | Dicot |
| American vetch | Vicia americana | VIAM | Fabaceae | Dicot |
| American vetch | Vicia americana ssp. americana | VIAMA3 | Fabaceae | Dicot |
| American water horehound | Lycopus americanus | LYAM | Lamiaceae | Dicot |
| American waterawlwort | Subularia aquatica var. americana | SUAQA2 | Brassicaceae | Dicot |
| American white waterlily | Nymphaea odorata | NYOD | Nymphaeaceae | Dicot |
| American white waterlily | Nymphaea odorata ssp. odorata | NYODO | Nymphaeaceae | Dicot |
| American woollyfruit sedge | Carex lasiocarpa var. americana | CALAA | Cyperaceae | Monocot |
| American yellowrocket | Barbarea orthoceras | BAOR | Brassicaceae | Dicot |
| analogue sedge | Carex simulata | CASI2 | Cyperaceae | Monocot |
| Andean watermilfoil | Myriophyllum quitense | MYQU | Haloragaceae | Dicot |
| Anderson"s buttercup | Ranunculus andersonii | RAAN | Ranunculaceae | Dicot |
| Anderson"s buttercup | Ranunculus andersonii var. andersonii | RAANA | Ranunculaceae | Dicot |
| Anderson"s buttercup | Ranunculus andersonii var. tenellus | RAANT | Ranunculaceae | Dicot |
| Anderson"s larkspur | Delphinium andersonii | DEAN | Ranunculaceae | Dicot |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| angelica | Angelica | ANGEL | Apiaceae | Dicot |
| annual agoseris | Agoseris heterophylla | AGHE2 | Asteraceae | Dicot |
| annual agoseris | Agoseris heterophylla var. heterophylla | AGHEH | Asteraceae | Dicot |
| annual bluegrass | Poa annua | POAN | Poaceae | Monocot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual fescue | Vulpia myuros | VUMY | Poaceae | Monocot |
| annual hairgrass | Deschampsia danthonioides | DEDA | Poaceae | Monocot |
| annual honesty | Lunaria annua | LUAN | Brassicaceae | Dicot |
| annual muhly | Muhlenbergia minutissima | MUMI2 | Poaceae | Monocot |
| annual polemonium | Polemonium micranthum | POMI | Polemoniaceae | Dicot |
| annual psathyrotes | Psathyrotes annua | PSAN | Asteraceae | Dicot |
| annual rabbitsfoot grass | Polypogon monspeliensis | POMO5 | Poaceae | Monocot |
| annual ragweed | Ambrosia artemisiifolia | AMAR2 | Asteraceae | Dicot |
| annual ragweed | Ambrosia artemisiifolia var. elatior | AMARE | Asteraceae | Dicot |
| annual redspot monkeyflower | Mimulus parryi | MIPA4 | Scrophulariaceae | Dicot |
| annual sandwort | Minuartia pusilla | MIPU7 | Caryophyllaceae | Dicot |
| annual sandwort | Minuartia pusilla var. pusilla | MIPUP | Caryophyllaceae | Dicot |
| annual Townsend daisy | Townsendia annua | TOAN | Asteraceae | Dicot |
| annual wallrocket | Diplotaxis muralis | DIMU2 | Brassicaceae | Dicot |
| annual wheatgrass | Eremopyrum triticeum | ERTR13 | Poaceae | Monocot |
| annual windmills | Allionia choisyi | ALCH | Nyctaginaceae | Dicot |
| annual yellow sweetclover | Melilotus indicus | MEIN2 | Fabaceae | Dicot |
| antelope bitterbrush | Purshia tridentata | PUTR2 | Rosaceae | Dicot |
| Antelope Island skeletonplant | Lygodesmia dianthopsis | LYDI4 | Asteraceae | Dicot |
| Apache plume | Fallugia | FALLU | Rosaceae | Dicot |
| Apache plume | Fallugia paradoxa | FAPA | Rosaceae | Dicot |
| apetalous catchfly | Silene uralensis | SIUR | Caryophyllaceae | Dicot |
| apetalous catchfly | Silene uralensis ssp. montana | SIURM | Caryophyllaceae | Dicot |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apricot | Prunus armeniaca | PRAR3 | Rosaceae | Dicot |
| apricot globemallow | Sphaeralcea ambigua ssp. ambigua | SPAMA | Malvaceae | Dicot |
| Aquarius Plateau beardtongue | Penstemon parvus | PEPA26 | Scrophulariaceae | Dicot |
| Aquarius Plateau Indian paintbrush | Castilleja aquariensis | CAAQ4 | Scrophulariaceae | Dicot |
| Arabian schismus | Schismus arabicus | SCAR | Poaceae | Monocot |
| Arapaho sedge | Carex arapahoensis | CAAR13 | Cyperaceae | Monocot |
| Arapien blazingstar | Mentzelia argillosa | MEAR5 | Loasaceae | Dicot |
| arctic alpine fleabane | Erigeron humilis | ERHU | Asteraceae | Dicot |
| arctic alpine forget-me-not | Eritrichium nanum | ERNA | Boraginaceae | Dicot |
| arctic alpine forget-me-not | Eritrichium nanum var. argenteum | ERNAA2 | Boraginaceae | Dicot |
| arctic alpine forget-me-not | Eritrichium nanum var. elongatum | ERNAE | Boraginaceae | Dicot |
| arctic bellflower | Campanula uniflora | CAUN2 | Campanulaceae | Dicot |
| arctic bluegrass | Poa arctica | POAR2 | Poaceae | Monocot |
| arctic bluegrass | Poa arctica ssp. aperta | POARA | Poaceae | Monocot |
| arctic bluegrass | Poa arctica ssp. arctica | POARA2 | Poaceae | Monocot |
| arctic bluegrass | Poa arctica ssp. grayana | POARG | Poaceae | Monocot |
| arctic pearlwort | Sagina saginoides | SASA | Caryophyllaceae | Dicot |
| arctic rush | Juncus arcticus | JUAR2 | Juncaceae | Monocot |
| Argus blazingstar | Mentzelia oreophila | MEOR3 | Loasaceae | Dicot |
| aridland goosefoot | Chenopodium desiccatum | CHDE | Chenopodiaceae | Dicot |
| Arizona alumroot | Heuchera parvifolia var. arizonica | HEPAA | Saxifragaceae | Dicot |
| Arizona bladderpod | Lesquerella arizonica | LEAR4 | Brassicaceae | Dicot |
| Arizona blanketflower | Gaillardia arizonica | GAAR2 | Asteraceae | Dicot |
| Arizona centaury | Centaurium arizonicum | CEAR12 | Gentianaceae | Dicot |
| Arizona cinquefoil | Potentilla glandulosa ssp. arizonica | POGLA | Rosaceae | Dicot |
| Arizona cypress | Hesperocyparis arizonica | HEAR22 | Cupressaceae | Gymnosperm |
| Arizona false goldenaster | Heterotheca fulcrata var. arizonica | HEFUA | Asteraceae | Dicot |
| Arizona fescue | Festuca arizonica | FEAR2 | Poaceae | Monocot |
| Arizona four-nerve daisy | Tetraneuris acaulis var. arizonica | TEACA | Asteraceae | Dicot |
| Arizona honeysuckle | Lonicera arizonica | LOAR | Caprifoliaceae | Dicot |
| Arizona honeysweet | Tidestromia oblongifolia | TIOB | Amaranthaceae | Dicot |
| Arizona ipomopsis | Ipomopsis arizonica | IPAR2 | Polemoniaceae | Dicot |
| Arizona mousetail | Myosurus cupulatus | MYCU | Ranunculaceae | Dicot |
| Arizona mule-ears | Wyethia arizonica | WYAR | Asteraceae | Dicot |
| Arizona popcornflower | Plagiobothrys arizonicus | PLAR | Boraginaceae | Dicot |
| Arizona rubberweed | Hymenoxys subintegra | HYSU | Asteraceae | Dicot |
| Arizona siltbush | Zuckia brandegeei var. arizonica | ZUBRA | Chenopodiaceae | Dicot |
| Arizona skeletonplant | Lygodesmia arizonica | LYAR2 | Asteraceae | Dicot |
| Arizona spinystar | Escobaria vivipara var. arizonica | ESVIA | Cactaceae | Dicot |
| Arizona thistle | Cirsium arizonicum | CIAR3 | Asteraceae | Dicot |
| Arizona threeawn | Aristida arizonica | ARAR6 | Poaceae | Monocot |
| Arizona valerian | Valeriana arizonica | VAAR3 | Valerianaceae | Dicot |
| Arizona walnut | Juglans major | JUMA | Juglandaceae | Dicot |
| Arizona whitefeather | Ivesia arizonica var. arizonica | IVARA | Rosaceae | Dicot |
| Arizona willow | Salix arizonica | SAAR14 | Salicaceae | Dicot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| arnica | Arnica | ARNIC | Asteraceae | Dicot |
| aromatic Indian breadroot | Pediomelum aromaticum | PEAR7 | Fabaceae | Dicot |
| arrow thelypody | Thelypodium sagittatum | THSA2 | Brassicaceae | Dicot |
| arrow thelypody | Thelypodium sagittatum ssp. ovalifolium | THSAO | Brassicaceae | Dicot |
| arrow thelypody | Thelypodium sagittatum ssp. sagittatum | THSAS | Brassicaceae | Dicot |
| arrowgrass | Triglochin | TRIGL | Juncaginaceae | Monocot |
| arrowhead | Sagittaria | SAGIT | Alismataceae | Monocot |
| arrowleaf balsamroot | Balsamorhiza sagittata | BASA3 | Asteraceae | Dicot |
| arrowleaf ragwort | Senecio triangularis | SETR | Asteraceae | Dicot |
| arrowweed | Pluchea sericea | PLSE | Asteraceae | Dicot |
| arroyo willow | Salix lasiolepis | SALA6 | Salicaceae | Dicot |
| arroyo willow | Salix lasiolepis var. lasiolepis | SALAL2 | Salicaceae | Dicot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| ashen milkvetch | Astragalus tephrodes | ASTE8 | Fabaceae | Dicot |
| ashen milkvetch | Astragalus tephrodes var. brachylobus | ASTEB | Fabaceae | Dicot |
| ashy silktassel | Garrya flavescens | GAFL2 | Garryaceae | Dicot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| aspen bluebells | Mertensia arizonica | MEAR6 | Boraginaceae | Dicot |
| aspen fleabane | Erigeron speciosus | ERSP4 | Asteraceae | Dicot |
| aspen fleabane | Erigeron speciosus var. macranthus | ERSPM | Asteraceae | Dicot |
| aspen fleabane | Erigeron speciosus var. speciosus | ERSPS | Asteraceae | Dicot |
| aspen onion | Allium bisceptrum var. palmeri | ALBIP | Liliaceae | Monocot |
| aspen pea | Lathyrus laetivirens | LALA6 | Fabaceae | Dicot |
| aster | Ionactis | IONAC | Asteraceae | Dicot |
| aster | Eurybia | EURYB | Asteraceae | Dicot |
| aster | Eucephalus | EUCEP2 | Asteraceae | Dicot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| asthmaweed | Conyza bonariensis | COBO | Asteraceae | Dicot |
| Athel tamarisk | Tamarix aphylla | TAAP | Tamaricaceae | Dicot |
| atrichoseris | Atrichoseris | ATRIC | Asteraceae | Dicot |
| Attwood"s phacelia | Phacelia argillacea | PHAR2 | Hydrophyllaceae | Dicot |
| Atwood"s evening primrose | Camissonia atwoodii | CAAT10 | Onagraceae | Dicot |
| Atwood"s phacelia | Phacelia pulchella var. atwoodii | PHPUA | Hydrophyllaceae | Dicot |
| aurinia | Aurinia | AURIN | Brassicaceae | Dicot |
| Australian saltbush | Atriplex semibaccata | ATSE | Chenopodiaceae | Dicot |
| Australian waterbuttons | Cotula australis | COAU3 | Asteraceae | Dicot |
| Austrian draba | Draba fladnizensis | DRFL | Brassicaceae | Dicot |
| Austrian draba | Draba fladnizensis var. fladnizensis | DRFLF2 | Brassicaceae | Dicot |
| Austrian draba | Draba fladnizensis var. pattersonii | DRFLP | Brassicaceae | Dicot |
| Austrian yellowcress | Rorippa austriaca | ROAU | Brassicaceae | Dicot |
| autumn crocus | Colchicum autumnale | COAU4 | Liliaceae | Monocot |
| autumn dwarf gentian | Gentianella amarella | GEAM3 | Gentianaceae | Dicot |
| autumn dwarf gentian | Gentianella amarella ssp. acuta | GEAMA | Gentianaceae | Dicot |
| autumn dwarf gentian | Gentianella amarella ssp. heterosepala | GEAMH | Gentianaceae | Dicot |
| Aven Nelson"s phacelia | Phacelia anelsonii | PHAN | Hydrophyllaceae | Dicot |
| avens | Geum | GEUM | Rosaceae | Dicot |
| Awapa fleabane | Erigeron awapensis | ERAW | Asteraceae | Dicot |
| awlfruit sedge | Carex stipata | CAST5 | Cyperaceae | Monocot |
| awlwort | Subularia | SUBUL | Brassicaceae | Dicot |
| awned halfchaff sedge | Lipocarpha aristulata | LIAR6 | Cyperaceae | Monocot |
| Aztec marigold | Tagetes erecta | TAER | Asteraceae | Dicot |
| azure blue sage | Salvia azurea | SAAZ | Lamiaceae | Dicot |
| baby blue eyes | Nemophila | NEMOP | Hydrophyllaceae | Dicot |
| baby goldenrod | Solidago nana | SONA | Asteraceae | Dicot |
| baby"s breath | Gypsophila paniculata | GYPA | Caryophyllaceae | Dicot |
| baby"s-breath | Gypsophila | GYPSO | Caryophyllaceae | Dicot |
| baccharis | Baccharis | BACCH | Asteraceae | Dicot |
| Back"s sedge | Carex backii | CABA3 | Cyperaceae | Monocot |
| badlands mule-ears | Scabrethia scabra | SCSC15 | Asteraceae | Dicot |
| badlands mule-ears | Scabrethia scabra ssp. attenuata | SCSCA2 | Asteraceae | Dicot |
| badlands mule-ears | Scabrethia scabra ssp. canescens | SCSCC | Asteraceae | Dicot |
| badlands mule-ears | Scabrethia scabra ssp. scabra | SCSCS5 | Asteraceae | Dicot |
| Baffin fescue | Festuca baffinensis | FEBA | Poaceae | Monocot |
| bahia | Bahia | BAHIA | Asteraceae | Dicot |
| Bailey"s buckwheat | Eriogonum baileyi | ERBA7 | Polygonaceae | Dicot |
| Bailey"s buckwheat | Eriogonum baileyi var. baileyi | ERBAB | Polygonaceae | Dicot |
| Bailey"s ivesia | Ivesia baileyi | IVBA | Rosaceae | Dicot |
| Bailey"s ivesia | Ivesia baileyi var. setosa | IVBAS | Rosaceae | Dicot |
| Bailey"s rabbitbrush | Chrysothamnus baileyi | CHBA11 | Asteraceae | Dicot |
| bajada lupine | Lupinus concinnus | LUCO | Fabaceae | Dicot |
| Baker"s alpineparsley | Oreoxis bakeri | ORBA | Apiaceae | Dicot |
| Baker"s cryptantha | Cryptantha bakeri | CRBA4 | Boraginaceae | Dicot |
| Baker"s phacelia | Phacelia bakeri | PHBA3 | Hydrophyllaceae | Dicot |
| Baker"s wheatgrass | Elymus bakeri | ELBA3 | Poaceae | Monocot |
| bald brome | Bromus racemosus | BRRA2 | Poaceae | Monocot |
| ballhead ipomopsis | Ipomopsis congesta | IPCO5 | Polemoniaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta ssp. congesta | IPCOC3 | Polemoniaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta ssp. crebrifolia | IPCOC | Polemoniaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta ssp. frutescens | IPCOF | Polemoniaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta ssp. palmifrons | IPCOP | Polemoniaceae | Dicot |
| ballhead ragwort | Senecio sphaerocephalus | SESP4 | Asteraceae | Dicot |
| ballhead sandwort | Arenaria congesta | ARCO5 | Caryophyllaceae | Dicot |
| ballhead sandwort | Arenaria congesta var. congesta | ARCOC4 | Caryophyllaceae | Dicot |
| ballhead waterleaf | Hydrophyllum capitatum | HYCA4 | Hydrophyllaceae | Dicot |
| ballhead waterleaf | Hydrophyllum capitatum var. capitatum | HYCAC | Hydrophyllaceae | Dicot |
| balsam groundsel | Packera paupercula | PAPA20 | Asteraceae | Dicot |
| balsam poplar | Populus balsamifera | POBA2 | Salicaceae | Dicot |
| balsamroot | Balsamorhiza | BALSA | Asteraceae | Dicot |
| banana yucca | Yucca baccata | YUBA | Agavaceae | Monocot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| barberry | Berberis | BERBE | Berberidaceae | Dicot |
| barberry | Mahonia | MAHON | Berberidaceae | Dicot |
| barbwire Russian thistle | Salsola paulsenii | SAPA8 | Chenopodiaceae | Dicot |
| barestem biscuitroot | Lomatium nudicaule | LONU2 | Apiaceae | Dicot |
| baretwig neststraw | Stylocline psilocarphoides | STPS | Asteraceae | Dicot |
| barley | Hordeum | HORDE | Poaceae | Monocot |
| barley | ×Elyhordeum | ELYHO | Poaceae | Monocot |
| Barneby"s Indian paintbrush | Castilleja scabrida var. barnebyana | CASCB3 | Scrophulariaceae | Dicot |
| Barneby"s pepperweed | Lepidium barnebyanum | LEBA | Brassicaceae | Dicot |
| Barneby"s serpentweed | Tonestus kingii var. barnebyana | TOKIB | Asteraceae | Dicot |
| Barneby"s thistle | Cirsium barnebyi | CIBA | Asteraceae | Dicot |
| barnyardgrass | Echinochloa crus-galli | ECCR | Poaceae | Monocot |
| barrel cactus | Ferocactus | FEROC | Cactaceae | Dicot |
| basalt milkvetch | Astragalus filipes | ASFI | Fabaceae | Dicot |
| basalt springparsley | Cymopterus basalticus | CYBA3 | Apiaceae | Dicot |
| bashful ragwort | Senecio pudicus | SEPU3 | Asteraceae | Dicot |
| basin big sagebrush | Artemisia tridentata ssp. tridentata | ARTRT | Asteraceae | Dicot |
| basin cryptantha | Cryptantha ambigua | CRAM3 | Boraginaceae | Dicot |
| basin fleabane | Erigeron pulcherrimus | ERPU9 | Asteraceae | Dicot |
| basin nemophila | Nemophila breviflora | NEBR | Hydrophyllaceae | Dicot |
| basin saltbush | Atriplex tridentata | ATTR3 | Chenopodiaceae | Dicot |
| basin wildrye | Leymus cinereus | LECI4 | Poaceae | Monocot |
| basin yellow cryptantha | Cryptantha confertiflora | CRCO12 | Boraginaceae | Dicot |
| basindaisy | Platyschkuhria | PLATY5 | Asteraceae | Dicot |
| basindaisy | Platyschkuhria integrifolia | PLIN7 | Asteraceae | Dicot |
| basindaisy | Platyschkuhria integrifolia var. ourolepis | PLINO2 | Asteraceae | Dicot |
| basket of gold | Aurinia saxatilis | AUSA | Brassicaceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bastardsage | Eriogonum wrightii | ERWR | Polygonaceae | Dicot |
| bastardsage | Eriogonum wrightii var. wrightii | ERWRW | Polygonaceae | Dicot |
| Bateman"s buckwheat | Eriogonum batemanii | ERBA5 | Polygonaceae | Dicot |
| bay forget-me-not | Myosotis laxa | MYLA | Boraginaceae | Dicot |
| beaded lipfern | Cheilanthes wootonii | CHWO | Pteridaceae | Fern |
| beaked skeletonweed | Shinnersoseris | SHINN2 | Asteraceae | Dicot |
| beaked skeletonweed | Shinnersoseris rostrata | SHRO2 | Asteraceae | Dicot |
| beaked spikerush | Eleocharis rostellata | ELRO2 | Cyperaceae | Monocot |
| bean | Phaseolus | PHASE | Fabaceae | Dicot |
| Bear River fleabane | Erigeron ursinus | ERUR2 | Asteraceae | Dicot |
| beard lichen | Usnea | USNEA2 | Parmeliaceae | Lichen |
| bearded cinquefoil | Potentilla crinita | POCR4 | Rosaceae | Dicot |
| bearded cinquefoil | Potentilla crinita var. crinita | POCRC2 | Rosaceae | Dicot |
| bearded cryptantha | Cryptantha barbigera | CRBA5 | Boraginaceae | Dicot |
| bearded fescue | Festuca subulata | FESU | Poaceae | Monocot |
| bearded flatsedge | Cyperus squarrosus | CYSQ | Cyperaceae | Monocot |
| bearded lupine | Lupinus barbiger | LUBA | Fabaceae | Dicot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| beardgrass | Bothriochloa | BOTHR | Poaceae | Monocot |
| beardless rabbitsfoot grass | Polypogon viridis | POVI9 | Poaceae | Monocot |
| beardless wheatgrass | Pseudoroegneria spicata ssp. inermis | PSSPI | Poaceae | Monocot |
| beardless wildrye | Leymus triticoides | LETR5 | Poaceae | Monocot |
| beardlip penstemon | Penstemon barbatus | PEBA2 | Scrophulariaceae | Dicot |
| beardlip penstemon | Penstemon barbatus ssp. barbatus | PEBAB | Scrophulariaceae | Dicot |
| beardlip penstemon | Penstemon barbatus ssp. trichander | PEBAT2 | Scrophulariaceae | Dicot |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| beardtongue | Penstemon ×jonesii | PEJO2 | Scrophulariaceae | Dicot |
| beargrass | Nolina | NOLIN | Liliaceae | Monocot |
| bearpoppy | Arctomecon | ARCTO | Papaveraceae | Dicot |
| beautiful aster | Eurybia glauca var. pulchra | EUGLP | Asteraceae | Dicot |
| beautiful cinquefoil | Potentilla pulcherrima | POPU9 | Rosaceae | Dicot |
| beautiful fleabane | Erigeron formosissimus | ERFO3 | Asteraceae | Dicot |
| beautiful Indian paintbrush | Castilleja pulchella | CAPU10 | Scrophulariaceae | Dicot |
| beautiful phacelia | Phacelia pulchella | PHPU | Hydrophyllaceae | Dicot |
| beautiful phacelia | Phacelia pulchella var. pulchella | PHPUP3 | Hydrophyllaceae | Dicot |
| beautiful phacelia | Phacelia pulchella var. sabulonum | PHPUS | Hydrophyllaceae | Dicot |
| beautiful rockcress | Arabis pulchra var. gracilis | ARPUG | Brassicaceae | Dicot |
| beautiful rockcress | Arabis pulchra | ARPU2 | Brassicaceae | Dicot |
| beautiful rockcress | Arabis pulchra var. pallens | ARPUP | Brassicaceae | Dicot |
| beautiful sandwort | Minuartia rubella | MIRU3 | Caryophyllaceae | Dicot |
| beautiful spikerush | Eleocharis bella | ELBE | Cyperaceae | Monocot |
| beautybush | Kolkwitzia amabilis | KOAM80 | Caprifoliaceae | Dicot |
| Beaver Mountain ragwort | Packera castoreus | PACA35 | Asteraceae | Dicot |
| beavertail pricklypear | Opuntia basilaris | OPBA2 | Cactaceae | Dicot |
| beavertail pricklypear | Opuntia basilaris var. basilaris | OPBAB2 | Cactaceae | Dicot |
| beavertip draba | Draba globosa | DRGL6 | Brassicaceae | Dicot |
| Bebb willow | Salix bebbiana | SABE2 | Salicaceae | Dicot |
| Bebb"s sedge | Carex bebbii | CABE2 | Cyperaceae | Monocot |
| Beckwith"s clover | Trifolium beckwithii | TRBE2 | Fabaceae | Dicot |
| Beckwith"s milkvetch | Astragalus beckwithii | ASBE3 | Fabaceae | Dicot |
| Beckwith"s milkvetch | Astragalus beckwithii var. beckwithii | ASBEB | Fabaceae | Dicot |
| Beckwith"s milkvetch | Astragalus beckwithii var. purpureus | ASBEP | Fabaceae | Dicot |
| Beckwith"s rockcress | Arabis beckwithii | ARBE2 | Brassicaceae | Dicot |
| Beckwith"s violet | Viola beckwithii | VIBE2 | Violaceae | Dicot |
| Beckwith"s violet | Viola beckwithii ssp. beckwithii | VIBEB | Violaceae | Dicot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| beebalm | Monarda | MONAR | Lamiaceae | Dicot |
| beeblossom | Gaura | GAURA | Onagraceae | Dicot |
| beebrush | Aloysia | ALOYS | Verbenaceae | Dicot |
| beech | Fagus | FAGUS | Fagaceae | Dicot |
| beechleaf frangula | Frangula betulifolia | FRBE2 | Rhamnaceae | Dicot |
| beet | Beta | BETA | Chenopodiaceae | Dicot |
| beggarticks | Bidens | BIDEN | Asteraceae | Dicot |
| Bellardi bog sedge | Kobresia myosuroides | KOMY | Cyperaceae | Monocot |
| bellflower | Campanula | CAMPA | Campanulaceae | Dicot |
| bellis | Bellis | BELLI | Asteraceae | Dicot |
| bent two-whorl buckwheat | Stenogonum flexum | STFL2 | Polygonaceae | Dicot |
| bentgrass | Agrostis | AGROS2 | Poaceae | Monocot |
| bergia | Bergia | BERGI | Elatinaceae | Dicot |
| Bering chickweed | Cerastium beeringianum | CEBE2 | Caryophyllaceae | Dicot |
| Bering chickweed | Cerastium beeringianum ssp. earlei | CEBEE | Caryophyllaceae | Dicot |
| Bermudagrass | Cynodon | CYNOD | Poaceae | Monocot |
| Bermudagrass | Cynodon dactylon | CYDA | Poaceae | Monocot |
| Bessey"s locoweed | Oxytropis besseyi | OXBE2 | Fabaceae | Dicot |
| Bessey"s locoweed | Oxytropis besseyi var. obnapiformis | OXBEO | Fabaceae | Dicot |
| Bessey"s locoweed | Oxytropis besseyi var. ventosa | OXBEV | Fabaceae | Dicot |
| betatakin fiddleleaf | Nama retrorsum | NARE | Hydrophyllaceae | Dicot |
| biannual lettuce | Lactuca ludoviciana | LALU | Asteraceae | Dicot |
| Bicknell"s cranesbill | Geranium bicknellii | GEBI2 | Geraniaceae | Dicot |
| Bicknell"s milkvetch | Astragalus consobrinus | ASCO16 | Fabaceae | Dicot |
| biennial cinquefoil | Potentilla biennis | POBI7 | Rosaceae | Dicot |
| biennial wormwood | Artemisia biennis | ARBI2 | Asteraceae | Dicot |
| biennial wormwood | Artemisia biennis var. biennis | ARBIB | Asteraceae | Dicot |
| biennial wormwood | Artemisia biennis var. diffusa | ARBID | Asteraceae | Dicot |
| big bluestem | Andropogon gerardii | ANGE | Poaceae | Monocot |
| big chickweed | Cerastium fontanum ssp. vulgare | CEFOV2 | Caryophyllaceae | Dicot |
| big galleta | Pleuraphis rigida | PLRI3 | Poaceae | Monocot |
| big sacaton | Sporobolus wrightii | SPWR2 | Poaceae | Monocot |
| big sagebrush | Artemisia tridentata | ARTR2 | Asteraceae | Dicot |
| big sagebrush | Artemisia tridentata ssp. spiciformis | ARTRS2 | Asteraceae | Dicot |
| big saltbush | Atriplex lentiformis | ATLE | Chenopodiaceae | Dicot |
| big saltbush | Atriplex lentiformis ssp. lentiformis | ATLEL | Chenopodiaceae | Dicot |
| big squirreltail | Elymus multisetus | ELMU3 | Poaceae | Monocot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| Bigelow sage | Artemisia bigelovii | ARBI3 | Asteraceae | Dicot |
| Bigelow"s bluegrass | Poa bigelovii | POBI | Poaceae | Monocot |
| Bigelow"s linanthus | Linanthus bigelovii | LIBI2 | Polemoniaceae | Dicot |
| Bigelow"s monkeyflower | Mimulus bigelovii | MIBI6 | Scrophulariaceae | Dicot |
| Bigelow"s monkeyflower | Mimulus bigelovii var. bigelovii | MIBIB2 | Scrophulariaceae | Dicot |
| Bigelow"s tansyaster | Machaeranthera bigelovii | MABI | Asteraceae | Dicot |
| Bigelow"s tansyaster | Machaeranthera bigelovii var. commixta | MABIC | Asteraceae | Dicot |
| bigflower agoseris | Agoseris grandiflora | AGGR | Asteraceae | Dicot |
| bigflower cinquefoil | Potentilla fissa | POFI3 | Rosaceae | Dicot |
| bigfruit dodder | Cuscuta megalocarpa | CUME4 | Cuscutaceae | Dicot |
| bighead dustymaiden | Chaenactis macrantha | CHMA | Asteraceae | Dicot |
| bigleaf periwinkle | Vinca major | VIMA | Apocynaceae | Dicot |
| bigroot blue-eyed grass | Sisyrinchium radicatum | SIRA3 | Iridaceae | Monocot |
| bigseed alfalfa dodder | Cuscuta indecora | CUIN | Cuscutaceae | Dicot |
| bigseed biscuitroot | Lomatium macrocarpum | LOMA3 | Apiaceae | Dicot |
| bigseed dodder | Cuscuta indecora var. neuropetala | CUINN | Cuscutaceae | Dicot |
| bigtooth maple | Acer grandidentatum | ACGR3 | Aceraceae | Dicot |
| bigtooth maple | Acer grandidentatum var. grandidentatum | ACGRG | Aceraceae | Dicot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| birch | Betula ×utahensis | BEUT | Betulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| bird vetch | Vicia cracca | VICR | Fabaceae | Dicot |
| bird vetch | Vicia cracca ssp. cracca | VICRC | Fabaceae | Dicot |
| bird"s-beak | Cordylanthus | CORDY | Scrophulariaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus | LOCO6 | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus var. corniculatus | LOCOC5 | Fabaceae | Dicot |
| bird-of-paradise shrub | Caesalpinia gilliesii | CAGI | Fabaceae | Dicot |
| birdcage evening primrose | Oenothera deltoides | OEDE2 | Onagraceae | Dicot |
| birdcage evening primrose | Oenothera deltoides ssp. ambigua | OEDEA | Onagraceae | Dicot |
| birdcage evening primrose | Oenothera deltoides ssp. deltoides | OEDED4 | Onagraceae | Dicot |
| birdeye pearlwort | Sagina procumbens | SAPR | Caryophyllaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdnest buckwheat | Eriogonum nidularium | ERNI4 | Polygonaceae | Dicot |
| birdnest milkvetch | Astragalus nidularius | ASNI2 | Fabaceae | Dicot |
| bishop"s milkvetch | Astragalus episcopus | ASEP | Fabaceae | Dicot |
| bishop"s milkvetch | Astragalus episcopus var. episcopus | ASEPE | Fabaceae | Dicot |
| bishop"s milkvetch | Astragalus episcopus var. lancearius | ASEPL | Fabaceae | Dicot |
| bitter cherry | Prunus emarginata | PREM | Rosaceae | Dicot |
| bitter cherry | Prunus emarginata var. emarginata | PREME | Rosaceae | Dicot |
| Bitter Creek phacelia | Phacelia salina | PHSA3 | Hydrophyllaceae | Dicot |
| bitter dock | Rumex obtusifolius | RUOB | Polygonaceae | Dicot |
| bitter fleabane | Erigeron acris | ERAC2 | Asteraceae | Dicot |
| bitter fleabane | Erigeron acris ssp. debilis | ERACD2 | Asteraceae | Dicot |
| bitter root | Lewisia rediviva | LERE7 | Portulacaceae | Dicot |
| bitter root | Lewisia rediviva var. minor | LEREM | Portulacaceae | Dicot |
| bitterbrush | Purshia | PURSH | Rosaceae | Dicot |
| bittercress | Cardamine | CARDA | Brassicaceae | Dicot |
| black alpine sedge | Carex nigricans | CANI2 | Cyperaceae | Monocot |
| black bindweed | Polygonum convolvulus | POCO10 | Polygonaceae | Dicot |
| black bindweed | Polygonum convolvulus var. convolvulus | POCOC2 | Polygonaceae | Dicot |
| black chokecherry | Prunus virginiana var. melanocarpa | PRVIM | Rosaceae | Dicot |
| black cottonwood | Populus balsamifera ssp. trichocarpa | POBAT | Salicaceae | Dicot |
| black elderberry | Sambucus nigra | SANI4 | Caprifoliaceae | Dicot |
| black grama | Bouteloua eriopoda | BOER4 | Poaceae | Monocot |
| black henbane | Hyoscyamus niger | HYNI | Solanaceae | Dicot |
| black locust | Robinia pseudoacacia | ROPS | Fabaceae | Dicot |
| black medick | Medicago lupulina | MELU | Fabaceae | Dicot |
| black mustard | Brassica nigra | BRNI | Brassicaceae | Dicot |
| black sagebrush | Artemisia nova | ARNO4 | Asteraceae | Dicot |
| black sedge | Carex nova | CANO3 | Cyperaceae | Monocot |
| black spleenwort | Asplenium adiantum-nigrum | ASAD | Aspleniaceae | Fern |
| black walnut | Juglans nigra | JUNI | Juglandaceae | Dicot |
| blackandwhite sedge | Carex albonigra | CAAL6 | Cyperaceae | Monocot |
| blackberry | Rubus | RUBUS | Rosaceae | Dicot |
| blackbrush | Coleogyne ramosissima | CORA | Rosaceae | Dicot |
| blackeyed Susan | Rudbeckia hirta | RUHI2 | Asteraceae | Dicot |
| blackeyed Susan | Rudbeckia hirta var. pulcherrima | RUHIP | Asteraceae | Dicot |
| blackfoot groundsmoke | Gayophytum racemosum | GARA | Onagraceae | Dicot |
| blackfoot quillwort | Isoetes melanopoda | ISME | Isoetaceae | Quillwort |
| Blackfoot River evening primrose | Camissonia andina | CAAN14 | Onagraceae | Dicot |
| blackhead fleabane | Erigeron melanocephalus | ERME2 | Asteraceae | Dicot |
| blackroot sedge | Carex elynoides | CAEL3 | Cyperaceae | Monocot |
| blackstem spleenwort | Asplenium resiliens | ASRE | Aspleniaceae | Fern |
| bladder campion | Silene latifolia | SILA21 | Caryophyllaceae | Dicot |
| bladder campion | Silene latifolia ssp. alba | SILAA3 | Caryophyllaceae | Dicot |
| bladder senna | Colutea arborescens | COAR6 | Fabaceae | Dicot |
| bladderfern | Cystopteris | CYSTO | Dryopteridaceae | Fern |
| bladderpod | Lesquerella | LESQU | Brassicaceae | Dicot |
| bladdersage | Salazaria | SALAZ | Lamiaceae | Dicot |
| bladderwort | Utricularia | UTRIC | Lentibulariaceae | Dicot |
| Blaine fishhook cactus | Sclerocactus spinosior ssp. blainei | SCSPB | Cactaceae | Dicot |
| blanketflower | Gaillardia | GAILL | Asteraceae | Dicot |
| blanketflower | Gaillardia aristata | GAAR | Asteraceae | Dicot |
| blazingstar | Mentzelia | MENTZ | Loasaceae | Dicot |
| bleeding heart | Dicentra | DICEN | Fumariaceae | Dicot |
| blessed thistle | Cnicus benedictus | CNBE | Asteraceae | Dicot |
| blister sedge | Carex vesicaria | CAVE6 | Cyperaceae | Monocot |
| blite goosefoot | Chenopodium capitatum | CHCA4 | Chenopodiaceae | Dicot |
| bloody geranium | Geranium sanguineum | GESA2 | Geraniaceae | Dicot |
| blowout grass | Redfieldia | REDFI | Poaceae | Monocot |
| blowout grass | Redfieldia flexuosa | REFL | Poaceae | Monocot |
| Blue Diamond cholla | Cylindropuntia ×multigeniculata | CYMU11 | Cactaceae | Dicot |
| blue elderberry | Sambucus nigra ssp. cerulea | SANIC5 | Caprifoliaceae | Dicot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue grama | Bouteloua gracilis | BOGR2 | Poaceae | Monocot |
| blue lettuce | Lactuca tatarica | LATA | Asteraceae | Dicot |
| blue lettuce | Lactuca tatarica var. pulchella | LATAP | Asteraceae | Dicot |
| blue nodding locoweed | Oxytropis deflexa var. sericea | OXDES | Fabaceae | Dicot |
| blue panicum | Panicum antidotale | PAAN4 | Poaceae | Monocot |
| blue spruce | Picea pungens | PIPU | Pinaceae | Gymnosperm |
| blue threeawn | Aristida purpurea var. nealleyi | ARPUN | Poaceae | Monocot |
| blue wildrye | Elymus glaucus | ELGL | Poaceae | Monocot |
| blue wildrye | Elymus glaucus ssp. glaucus | ELGLG | Poaceae | Monocot |
| blue-eyed grass | Sisyrinchium | SISYR | Iridaceae | Monocot |
| bluebell bellflower | Campanula rotundifolia | CARO2 | Campanulaceae | Dicot |
| bluebells | Mertensia | MERTE | Boraginaceae | Dicot |
| blueberry | Vaccinium | VACCI | Ericaceae | Dicot |
| bluebonnet lupine | Lupinus palmeri | LUPA3 | Fabaceae | Dicot |
| bluebunch wheatgrass | Pseudoroegneria spicata ssp. spicata | PSSPS | Poaceae | Monocot |
| bluebunch wheatgrass | Pseudoroegneria spicata | PSSP6 | Poaceae | Monocot |
| bluecrown passionflower | Passiflora caerulea | PACA22 | Passifloraceae | Dicot |
| bluedicks | Dichelostemma capitatum | DICA14 | Liliaceae | Monocot |
| bluedicks | Dichelostemma capitatum ssp. capitatum | DICAC5 | Liliaceae | Monocot |
| bluedicks | Dichelostemma capitatum ssp. pauciflorum | DICAP | Liliaceae | Monocot |
| bluegrass | Poa | POA | Poaceae | Monocot |
| bluegrass | Poa ×nematophylla | PONE18 | Poaceae | Monocot |
| bluehead gilia | Gilia capitata | GICA5 | Polemoniaceae | Dicot |
| bluehead gilia | Gilia capitata ssp. capitata | GICAC3 | Polemoniaceae | Dicot |
| bluejoint | Calamagrostis canadensis | CACA4 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis var. canadensis | CACAC10 | Poaceae | Monocot |
| bluestar | Amsonia | AMSON | Apocynaceae | Dicot |
| bluestem | Andropogon | ANDRO2 | Poaceae | Monocot |
| bluestem beardtongue | Penstemon cyanocaulis | PECY4 | Scrophulariaceae | Dicot |
| bluet | Houstonia | HOUST | Rubiaceae | Dicot |
| bluntleaf sandwort | Moehringia lateriflora | MOLA6 | Caryophyllaceae | Dicot |
| bluntleaf spikemoss | Selaginella mutica | SEMU | Selaginellaceae | Lycopod |
| bluntleaf spikemoss | Selaginella mutica var. mutica | SEMUM | Selaginellaceae | Lycopod |
| bluntleaf yellowcress | Rorippa curvipes | ROCU2 | Brassicaceae | Dicot |
| bluntleaf yellowcress | Rorippa curvipes var. curvipes | ROCUC | Brassicaceae | Dicot |
| bluntleaf yellowcress | Rorippa curvipes var. truncata | ROCUT | Brassicaceae | Dicot |
| bluntleaved orchid | Platanthera obtusata | PLOB | Orchidaceae | Monocot |
| bluntleaved orchid | Platanthera obtusata ssp. obtusata | PLOBO3 | Orchidaceae | Monocot |
| bluntseed sweetroot | Osmorhiza depauperata | OSDE | Apiaceae | Dicot |
| Bodin"s milkvetch | Astragalus bodinii | ASBO | Fabaceae | Dicot |
| bog blueberry | Vaccinium uliginosum | VAUL | Ericaceae | Dicot |
| bog sedge | Kobresia | KOBRE | Cyperaceae | Monocot |
| bog stitchwort | Minuartia stricta | MIST5 | Caryophyllaceae | Dicot |
| bog willowherb | Epilobium leptophyllum | EPLE2 | Onagraceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| Boise milkvetch | Astragalus adanus | ASAD2 | Fabaceae | Dicot |
| Bolander"s bluegrass | Poa bolanderi | POBO | Poaceae | Monocot |
| Bolander"s quillwort | Isoetes bolanderi | ISBO | Isoetaceae | Quillwort |
| Bolander"s sedge | Carex bolanderi | CABO2 | Cyperaceae | Monocot |
| Bolander"s spikerush | Eleocharis bolanderi | ELBO | Cyperaceae | Monocot |
| Bolander"s yampah | Perideridia bolanderi | PEBO2 | Apiaceae | Dicot |
| Bolander"s yampah | Perideridia bolanderi ssp. bolanderi | PEBOB | Apiaceae | Dicot |
| Bonneville big sagebrush | Artemisia tridentata ×bonnevillensis | ARTRB3 | Asteraceae | Dicot |
| Bonneville pea | Lathyrus brachycalyx | LABR | Fabaceae | Dicot |
| Bonneville pea | Lathyrus brachycalyx ssp. brachycalyx | LABRB | Fabaceae | Dicot |
| Bonneville saltbush | Atriplex bonnevillensis | ATBO | Chenopodiaceae | Dicot |
| Booth"s evening primrose | Camissonia boothii | CABO7 | Onagraceae | Dicot |
| Booth"s willow | Salix boothii | SABO2 | Salicaceae | Dicot |
| borage | Borago | BORAG | Boraginaceae | Dicot |
| boraxweed | Nitrophila occidentalis | NIOC2 | Chenopodiaceae | Dicot |
| boreal bog sedge | Carex magellanica | CAMA12 | Cyperaceae | Monocot |
| boreal bog sedge | Carex magellanica ssp. irrigua | CAMAI2 | Cyperaceae | Monocot |
| boreal locoweed | Oxytropis borealis | OXBO | Fabaceae | Dicot |
| boreal locoweed | Oxytropis borealis var. australis | OXBOA | Fabaceae | Dicot |
| boreal sagebrush | Artemisia arctica | ARAR9 | Asteraceae | Dicot |
| boreal sagebrush | Artemisia arctica ssp. arctica | ARARA2 | Asteraceae | Dicot |
| boreal starwort | Stellaria borealis | STBO3 | Caryophyllaceae | Dicot |
| boreal starwort | Stellaria borealis ssp. borealis | STBOB | Caryophyllaceae | Dicot |
| bottlebrush sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| Boulder Mountain cinquefoil | Potentilla angelliae | POAN14 | Rosaceae | Dicot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| Bourgeau"s pepperweed | Lepidium ramosissimum var. bourgeauanum | LERAB2 | Brassicaceae | Dicot |
| boxelder | Acer negundo | ACNE2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. interius | ACNEI2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. negundo | ACNEN | Aceraceae | Dicot |
| brackenfern | Pteridium | PTERI | Dennstaedtiaceae | Fern |
| bracted lousewort | Pedicularis bracteosa | PEBR | Scrophulariaceae | Dicot |
| branched lagophylla | Lagophylla ramosissima | LARA | Asteraceae | Dicot |
| branched lagophylla | Lagophylla ramosissima ssp. ramosissima | LARAR | Asteraceae | Dicot |
| branched noseburn | Tragia ramosa | TRRA5 | Euphorbiaceae | Dicot |
| branching phacelia | Phacelia ramosissima | PHRA2 | Hydrophyllaceae | Dicot |
| branching phacelia | Phacelia ramosissima var. latifolia | PHRAL | Hydrophyllaceae | Dicot |
| Brandegee"s Jacob"s-ladder | Polemonium brandegeei | POBR8 | Polemoniaceae | Dicot |
| Brandegee"s milkvetch | Astragalus brandegeei | ASBR5 | Fabaceae | Dicot |
| Brandegee"s onion | Allium brandegeei | ALBR | Liliaceae | Monocot |
| Brazilian waterweed | Egeria densa | EGDE | Hydrocharitaceae | Monocot |
| Brenda"s yellow cryptantha | Cryptantha flava | CRFL5 | Boraginaceae | Dicot |
| Brewer"s bittercress | Cardamine breweri | CABR6 | Brassicaceae | Dicot |
| Brewer"s bittercress | Cardamine breweri var. breweri | CABRB | Brassicaceae | Dicot |
| Brewer"s cliffbrake | Pellaea breweri | PEBR4 | Pteridaceae | Fern |
| Brewer"s monkeyflower | Mimulus breweri | MIBR5 | Scrophulariaceae | Dicot |
| Brewer"s navarretia | Navarretia breweri | NABR | Polemoniaceae | Dicot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| Bridge penstemon | Penstemon rostriflorus | PERO10 | Scrophulariaceae | Dicot |
| brightblue speedwell | Veronica serpyllifolia ssp. humifusa | VESEH2 | Scrophulariaceae | Dicot |
| brightgreen spleenwort | Asplenium trichomanes-ramosum | ASTR10 | Aspleniaceae | Fern |
| brightwhite | Prenanthella exigua | PREX | Asteraceae | Dicot |
| bristle flax | Linum aristatum | LIAR3 | Linaceae | Dicot |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristly cryptantha | Cryptantha setosissima | CRSE5 | Boraginaceae | Dicot |
| bristly fiddleneck | Amsinckia tessellata | AMTE3 | Boraginaceae | Dicot |
| bristly fiddleneck | Amsinckia tessellata var. tessellata | AMTET | Boraginaceae | Dicot |
| bristly locust | Robinia hispida | ROHI | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. fertilis | ROHIF8 | Fabaceae | Dicot |
| bristly mousetail | Myosurus apetalus | MYAP | Ranunculaceae | Dicot |
| bristly mousetail | Myosurus apetalus var. borealis | MYAPB | Ranunculaceae | Dicot |
| bristly mousetail | Myosurus apetalus var. montanus | MYAPM | Ranunculaceae | Dicot |
| bristly nama | Nama hispidum | NAHI | Hydrophyllaceae | Dicot |
| bristly Nootka rose | Rosa nutkana var. hispida | RONUH | Rosaceae | Dicot |
| bristly wolfstail | Lycurus setosus | LYSE3 | Poaceae | Monocot |
| bristlystalked sedge | Carex leptalea | CALE10 | Cyperaceae | Monocot |
| bristlystalked sedge | Carex leptalea ssp. leptalea | CALEL4 | Cyperaceae | Monocot |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle pricklypear | Opuntia fragilis | OPFR | Cactaceae | Dicot |
| brittle spineflower | Chorizanthe brevicornu | CHBR | Polygonaceae | Dicot |
| brittle spineflower | Chorizanthe brevicornu var. brevicornu | CHBRB | Polygonaceae | Dicot |
| brittlebush | Encelia | ENCEL | Asteraceae | Dicot |
| brittlebush | Encelia farinosa | ENFA | Asteraceae | Dicot |
| broad-leaf gilia | Aliciella latifolia | ALLA13 | Polemoniaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius | PEAN4 | Scrophulariaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius var. dulcis | PEAND | Scrophulariaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius var. venosus | PEANV | Scrophulariaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius var. vernalensis | PEANV2 | Scrophulariaceae | Dicot |
| broadfruit bur-reed | Sparganium eurycarpum | SPEU | Sparganiaceae | Monocot |
| broadfruit combseed | Pectocarya platycarpa | PEPL | Boraginaceae | Dicot |
| broadkeel milkvetch | Astragalus platytropis | ASPL3 | Fabaceae | Dicot |
| broadleaf arnica | Arnica latifolia | ARLA8 | Asteraceae | Dicot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf beardtongue | Penstemon platyphyllus | PEPL4 | Scrophulariaceae | Dicot |
| broadleaf cattail | Typha latifolia | TYLA | Typhaceae | Monocot |
| broadleaf four o"clock | Mirabilis decipiens | MIDE5 | Nyctaginaceae | Dicot |
| broadleaf gilia | Aliciella latifolia ssp. imperialis | ALLAI | Polemoniaceae | Dicot |
| broadleaf gilia | Aliciella latifolia ssp. latifolia | ALLAL3 | Polemoniaceae | Dicot |
| broadleaf knotweed | Polygonum minimum | POMI2 | Polygonaceae | Dicot |
| broadleaf lupine | Lupinus latifolius | LULA4 | Fabaceae | Dicot |
| broadleaf lupine | Lupinus latifolius ssp. leucanthus | LULAL | Fabaceae | Dicot |
| broadleaf milkvetch | Astragalus lentiginosus var. chartaceus | ASLEC | Fabaceae | Dicot |
| broadleaf milkweed | Asclepias latifolia | ASLA4 | Asclepiadaceae | Dicot |
| broadleaf pondweed | Stuckenia striata | STST20 | Potamogetonaceae | Monocot |
| broadleaved pepperweed | Lepidium latifolium | LELA2 | Brassicaceae | Dicot |
| broadlipped twayblade | Listera convallarioides | LICO5 | Orchidaceae | Monocot |
| broadnineleaf biscuitroot | Lomatium triternatum var. anomalum | LOTRA | Apiaceae | Dicot |
| broadpod draba | Draba platycarpa | DRPL | Brassicaceae | Dicot |
| brome | Bromus | BROMU | Poaceae | Monocot |
| brome fescue | Vulpia bromoides | VUBR | Poaceae | Monocot |
| brook cinquefoil | Potentilla rivalis | PORI3 | Rosaceae | Dicot |
| brook saxifrage | Saxifraga odontoloma | SAOD2 | Saxifragaceae | Dicot |
| brookfoam | Telesonix | TELES2 | Saxifragaceae | Dicot |
| brookweed | Samolus | SAMOL | Primulaceae | Dicot |
| broom | Cytisus | CYTIS | Fabaceae | Dicot |
| broom sedge | Carex scoparia | CASC11 | Cyperaceae | Monocot |
| broom sedge | Carex scoparia var. scoparia | CASCS | Cyperaceae | Monocot |
| broom snakeweed | Gutierrezia sarothrae | GUSA2 | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides | SESP3 | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides var. multicapitatus | SESPM | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides var. spartioides | SESPS2 | Asteraceae | Dicot |
| broomcorn millet | Panicum miliaceum ssp. miliaceum | PAMIM | Poaceae | Monocot |
| broomrape | Orobanche | OROBA | Orobanchaceae | Dicot |
| broomsage | Lepidospartum | LEPID2 | Asteraceae | Dicot |
| brown mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| brown sedge | Carex subfusca | CASU6 | Cyperaceae | Monocot |
| Brown"s peony | Paeonia brownii | PABR | Paeoniaceae | Dicot |
| browneyed Susan | Rudbeckia triloba | RUTR2 | Asteraceae | Dicot |
| browneyed Susan | Rudbeckia triloba var. triloba | RUTRT | Asteraceae | Dicot |
| browneyes | Camissonia claviformis | CACL4 | Onagraceae | Dicot |
| browneyes | Camissonia claviformis ssp. aurantiaca | CACLA2 | Onagraceae | Dicot |
| browneyes | Camissonia claviformis ssp. claviformis | CACLC3 | Onagraceae | Dicot |
| browneyes | Camissonia claviformis ssp. cruciformis | CACLC | Onagraceae | Dicot |
| browneyes | Camissonia claviformis ssp. integrior | CACLI | Onagraceae | Dicot |
| brownfoot | Acourtia wrightii | ACWR5 | Asteraceae | Dicot |
| brownish sedge | Carex brunnescens | CABR15 | Cyperaceae | Monocot |
| brownish sedge | Carex brunnescens ssp. sphaerostachya | CABRS | Cyperaceae | Monocot |
| brownplume wirelettuce | Stephanomeria pauciflora | STPA4 | Asteraceae | Dicot |
| brownray knapweed | Centaurea jacea | CEJA | Asteraceae | Dicot |
| browse milkvetch | Astragalus cibarius | ASCI2 | Fabaceae | Dicot |
| Bruneau mariposa lily | Calochortus bruneaunis | CABR4 | Liliaceae | Monocot |
| Bryce Canyon Indian paintbrush | Castilleja revealii | CARE10 | Scrophulariaceae | Dicot |
| bryony | Bryonia | BRYON | Cucurbitaceae | Dicot |
| buck-horn cholla | Cylindropuntia acanthocarpa | CYAC8 | Cactaceae | Dicot |
| buckbean | Menyanthes | MENYA | Menyanthaceae | Dicot |
| buckbean | Menyanthes trifoliata | METR3 | Menyanthaceae | Dicot |
| buckhorn cholla | Cylindropuntia acanthocarpa var. acanthocarpa | CYACA2 | Cactaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckwheat | Stenogonum | STENO5 | Polygonaceae | Dicot |
| buckwheat | Eriogonum ×duchesnense | ERDU2 | Polygonaceae | Dicot |
| buckwheat | Eriogonum | ERIOG | Polygonaceae | Dicot |
| bud sagebrush | Picrothamnus | PICRO | Asteraceae | Dicot |
| bud sagebrush | Picrothamnus desertorum | PIDE4 | Asteraceae | Dicot |
| buffaloberry | Shepherdia | SHEPH | Elaeagnaceae | Dicot |
| buffalobur nightshade | Solanum rostratum | SORO | Solanaceae | Dicot |
| buffalograss | Bouteloua dactyloides | BODA2 | Poaceae | Monocot |
| bugbane | Trautvetteria | TRAUT | Ranunculaceae | Dicot |
| bugle | Ajuga | AJUGA | Lamiaceae | Dicot |
| bugloss | Anchusa | ANCHU | Boraginaceae | Dicot |
| buglossoides | Buglossoides | BUGLO | Boraginaceae | Dicot |
| bugseed | Corispermum | CORIS | Chenopodiaceae | Dicot |
| Bukhara fleeceflower | Polygonum baldschuanicum | POBA3 | Polygonaceae | Dicot |
| bulb panicgrass | Panicum bulbosum | PABU | Poaceae | Monocot |
| bulbil onion | Allium geyeri var. tenerum | ALGET | Liliaceae | Monocot |
| bulblet bladderfern | Cystopteris bulbifera | CYBU3 | Dryopteridaceae | Fern |
| bulbous bluegrass | Poa bulbosa | POBU | Poaceae | Monocot |
| bulbous springparsley | Cymopterus bulbosus | CYBU | Apiaceae | Dicot |
| bulbous woodland-star | Lithophragma glabrum | LIGL2 | Saxifragaceae | Dicot |
| Bull Mountain buckwheat | Eriogonum cronquistii | ERCR5 | Polygonaceae | Dicot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bulrush | Trichophorum | TRICH22 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Schoenoplectiella | SCHOE7 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bundleflower | Desmanthus | DESMA | Fabaceae | Dicot |
| bur-reed | Sparganium | SPARG | Sparganiaceae | Monocot |
| burclover | Medicago polymorpha | MEPO3 | Fabaceae | Dicot |
| burdock | Arctium | ARCTI | Asteraceae | Dicot |
| burhead | Echinodorus | ECHIN6 | Alismataceae | Monocot |
| burnet | Sanguisorba | SANGU2 | Rosaceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burrobrush | Hymenoclea | HYMEN3 | Asteraceae | Dicot |
| burrobrush | Hymenoclea salsola | HYSA | Asteraceae | Dicot |
| burrobrush | Hymenoclea salsola var. fasciculata | HYSAF | Asteraceae | Dicot |
| burrobush | Ambrosia dumosa | AMDU2 | Asteraceae | Dicot |
| burrograss | Scleropogon | SCLER7 | Poaceae | Monocot |
| burrograss | Scleropogon brevifolius | SCBR2 | Poaceae | Monocot |
| bush arrowleaf | Pleurocoronis pluriseta | PLPL | Asteraceae | Dicot |
| bush muhly | Muhlenbergia porteri | MUPO2 | Poaceae | Monocot |
| bush pea | Lathyrus brachycalyx ssp. zionis | LABRZ2 | Fabaceae | Dicot |
| bush vetchling | Lathyrus eucosmus | LAEU | Fabaceae | Dicot |
| bushclover dodder | Cuscuta pentagona var. glabrior | CUPEG | Cuscutaceae | Dicot |
| bushloving cryptantha | Cryptantha dumetorum | CRDU | Boraginaceae | Dicot |
| bushy bird"s beak | Cordylanthus ramosus | CORA5 | Scrophulariaceae | Dicot |
| bushy blazingstar | Mentzelia dispersa | MEDI | Loasaceae | Dicot |
| bushy blazingstar | Mentzelia dispersa var. dispersa | MEDID | Loasaceae | Dicot |
| bushy blazingstar | Mentzelia dispersa var. latifolia | MEDIL | Loasaceae | Dicot |
| bushy bluestem | Andropogon glomeratus | ANGL2 | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. pumilus | ANGLP | Poaceae | Monocot |
| bushy cryptantha | Cryptantha racemosa | CRRA2 | Boraginaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum | PORA3 | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. ramosissimum | PORAR | Polygonaceae | Dicot |
| butter and eggs | Linaria vulgaris | LIVU2 | Scrophulariaceae | Dicot |
| buttercup | Ranunculus | RANUN | Ranunculaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa | ASTU | Asclepiadaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa ssp. interior | ASTUI | Asclepiadaceae | Dicot |
| butterflybush | Buddleja | BUDDL2 | Buddlejaceae | Dicot |
| button brittlebush | Encelia resinifera ssp. resinifera | ENRER | Asteraceae | Dicot |
| buttonbush dodder | Cuscuta cephalanthi | CUCE | Cuscutaceae | Dicot |
| Buxbaum"s sedge | Carex buxbaumii | CABU6 | Cyperaceae | Monocot |
| Cache Valley buckwheat | Eriogonum loganum | ERLO3 | Polygonaceae | Dicot |
| cactus apple | Opuntia engelmannii | OPEN3 | Cactaceae | Dicot |
| cactus apple | Opuntia engelmannii var. engelmannii | OPENE | Cactaceae | Dicot |
| caespitose four-nerve daisy | Tetraneuris acaulis var. caespitosa | TEACC | Asteraceae | Dicot |
| Cainville thistle | Cirsium calcareum | CICA10 | Asteraceae | Dicot |
| calibrachoa | Calibrachoa | CALIB | Solanaceae | Dicot |
| calico | Loeseliastrum | LOESE2 | Polemoniaceae | Dicot |
| calicoflower | Downingia | DOWNI | Campanulaceae | Dicot |
| California alkaligrass | Puccinellia simplex | PUSI | Poaceae | Monocot |
| California amaranth | Amaranthus californicus | AMCA | Amaranthaceae | Dicot |
| California ash | Fraxinus dipetala | FRDI2 | Oleaceae | Dicot |
| California barrel cactus | Ferocactus cylindraceus | FECY | Cactaceae | Dicot |
| California bearpoppy | Arctomecon californica | ARCA4 | Papaveraceae | Dicot |
| California brickellbush | Brickellia californica | BRCA3 | Asteraceae | Dicot |
| California brickellbush | Brickellia californica var. californica | BRCAC | Asteraceae | Dicot |
| California caltrop | Kallstroemia californica | KACA | Zygophyllaceae | Dicot |
| California cottonrose | Logfia californica | LOCA19 | Asteraceae | Dicot |
| California croton | Croton californicus | CRCA5 | Euphorbiaceae | Dicot |
| California croton | Croton californicus var. californicus | CRCAC | Euphorbiaceae | Dicot |
| California evening primrose | Oenothera californica | OECA2 | Onagraceae | Dicot |
| California evening primrose | Oenothera californica ssp. avita | OECAA2 | Onagraceae | Dicot |
| California fagonbush | Fagonia laevis | FALA | Zygophyllaceae | Dicot |
| California false hellebore | Veratrum californicum | VECA2 | Liliaceae | Monocot |
| California false hellebore | Veratrum californicum var. californicum | VECAC2 | Liliaceae | Monocot |
| California hesperochiron | Hesperochiron californicus | HECA7 | Hydrophyllaceae | Dicot |
| California loosestrife | Lythrum californicum | LYCA4 | Lythraceae | Dicot |
| California mustard | Guillenia lasiophylla | GULA4 | Brassicaceae | Dicot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| California oatgrass | Danthonia californica | DACA3 | Poaceae | Monocot |
| California plumeseed | Rafinesquia californica | RACA | Asteraceae | Dicot |
| California poppy | Eschscholzia | ESCHS | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica | ESCA2 | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica ssp. californica | ESCAC | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica ssp. mexicana | ESCAM | Papaveraceae | Dicot |
| California redbud | Cercis orbiculata | CEOR9 | Fabaceae | Dicot |
| California satintail | Imperata brevifolia | IMBR2 | Poaceae | Monocot |
| California sawgrass | Cladium californicum | CLCA2 | Cyperaceae | Monocot |
| California waterwort | Elatine californica | ELCA | Elatinaceae | Dicot |
| Callaway milkvetch | Astragalus callithrix | ASCA8 | Fabaceae | Dicot |
| caltrop | Kallstroemia | KALLS | Zygophyllaceae | Dicot |
| camas | Camassia | CAMAS | Liliaceae | Monocot |
| camelthorn | Alhagi maurorum | ALMA12 | Fabaceae | Dicot |
| camphorweed | Heterotheca subaxillaris | HESU3 | Asteraceae | Dicot |
| camphorweed | Pluchea | PLUCH | Asteraceae | Dicot |
| campsis | Campsis | CAMPS | Bignoniaceae | Dicot |
| Canada bluegrass | Poa compressa | POCO | Poaceae | Monocot |
| Canada cocklebur | Xanthium strumarium var. canadense | XASTC | Asteraceae | Dicot |
| Canada germander | Teucrium canadense | TECA3 | Lamiaceae | Dicot |
| Canada goldenrod | Solidago canadensis | SOCA6 | Asteraceae | Dicot |
| Canada lettuce | Lactuca canadensis | LACA | Asteraceae | Dicot |
| Canada thistle | Cirsium arvense | CIAR4 | Asteraceae | Dicot |
| Canada wildrye | Elymus canadensis | ELCA4 | Poaceae | Monocot |
| Canadian gooseberry | Ribes oxyacanthoides | RIOX | Grossulariaceae | Dicot |
| Canadian horseweed | Conyza canadensis | COCA5 | Asteraceae | Dicot |
| Canadian horseweed | Conyza canadensis var. canadensis | COCAC3 | Asteraceae | Dicot |
| Canadian horseweed | Conyza canadensis var. glabrata | COCAG | Asteraceae | Dicot |
| Canadian milkvetch | Astragalus canadensis | ASCA11 | Fabaceae | Dicot |
| Canadian milkvetch | Astragalus canadensis var. canadensis | ASCAC6 | Fabaceae | Dicot |
| Canadian waterweed | Elodea canadensis | ELCA7 | Hydrocharitaceae | Monocot |
| Canadian white violet | Viola canadensis | VICA4 | Violaceae | Dicot |
| canaigre dock | Rumex hymenosepalus | RUHY | Polygonaceae | Dicot |
| canary violet | Viola praemorsa | VIPR3 | Violaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| Canby"s aster | Symphyotrichum foliaceum var. canbyi | SYFOC | Asteraceae | Dicot |
| candytuft | Smelowskia | SMELO | Brassicaceae | Dicot |
| candytuft | Iberis | IBERI | Brassicaceae | Dicot |
| cane bluestem | Bothriochloa barbinodis | BOBA3 | Poaceae | Monocot |
| canoe milkvetch | Astragalus cymboides | ASCY2 | Fabaceae | Dicot |
| cantaloupe | Cucumis melo | CUME | Cucurbitaceae | Dicot |
| canyon cryptantha | Cryptantha tenuis | CRTE8 | Boraginaceae | Dicot |
| canyon grape | Vitis arizonica | VIAR2 | Vitaceae | Dicot |
| Canyonlands biscuitroot | Lomatium latilobum | LOLA4 | Apiaceae | Dicot |
| Canyonlands prairie clover | Dalea flavescens | DAFL | Fabaceae | Dicot |
| capitate cryptantha | Cryptantha capitata | CRCA13 | Boraginaceae | Dicot |
| capitate sedge | Carex capitata | CACA13 | Cyperaceae | Monocot |
| capitate sedge | Carex capitata ssp. capitata | CACAC7 | Cyperaceae | Monocot |
| capsella | Capsella | CAPSE | Brassicaceae | Dicot |
| caraway | Carum carvi | CACA19 | Apiaceae | Dicot |
| cardinalflower | Lobelia cardinalis | LOCA2 | Campanulaceae | Dicot |
| carelessweed | Cyclachaena | CYCLA4 | Asteraceae | Dicot |
| Carelessweed | Cyclachaena xanthiifolia | CYXA2 | Asteraceae | Dicot |
| carelessweed | Amaranthus palmeri | AMPA | Amaranthaceae | Dicot |
| Carolina bugbane | Trautvetteria caroliniensis | TRCA | Ranunculaceae | Dicot |
| Carolina draba | Draba reptans | DRRE2 | Brassicaceae | Dicot |
| Carolina foxtail | Alopecurus carolinianus | ALCA4 | Poaceae | Monocot |
| Carolina geranium | Geranium carolinianum | GECA5 | Geraniaceae | Dicot |
| Carolina geranium | Geranium carolinianum var. carolinianum | GECAC4 | Geraniaceae | Dicot |
| Carolina horsenettle | Solanum carolinense | SOCA3 | Solanaceae | Dicot |
| Carolina horsenettle | Solanum carolinense var. carolinense | SOCAC4 | Solanaceae | Dicot |
| Carolina poplar | Populus ×canadensis | POCA19 | Salicaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. canescens | PHHOC | Polemoniaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. lanata | PHHOL | Polemoniaceae | Dicot |
| carpetweed | Mollugo | MOLLU | Molluginaceae | Dicot |
| carrotleaf biscuitroot | Lomatium dissectum var. multifidum | LODIM | Apiaceae | Dicot |
| Carruth"s sagewort | Artemisia carruthii | ARCA14 | Asteraceae | Dicot |
| carum | Carum | CARUM | Apiaceae | Dicot |
| carveseed | Glyptopleura marginata | GLMA2 | Asteraceae | Dicot |
| cascade willow | Salix cascadensis | SACA6 | Salicaceae | Dicot |
| castorbean | Ricinus communis | RICO3 | Euphorbiaceae | Dicot |
| cat"s ear | Hypochaeris | HYPOC | Asteraceae | Dicot |
| catalpa | Catalpa | CATAL | Bignoniaceae | Dicot |
| catchfly | Silene | SILEN | Caryophyllaceae | Dicot |
| catclaw acacia | Acacia greggii | ACGR | Fabaceae | Dicot |
| catclaw acacia | Acacia greggii var. greggii | ACGRG3 | Fabaceae | Dicot |
| Cathedral Bluff dwarf gentian | Gentianella tortuosa | GETO | Gentianaceae | Dicot |
| catnip | Nepeta | NEPET | Lamiaceae | Dicot |
| catnip | Nepeta cataria | NECA2 | Lamiaceae | Dicot |
| cattail | Typha | TYPHA | Typhaceae | Monocot |
| cattle saltbush | Atriplex polycarpa | ATPO | Chenopodiaceae | Dicot |
| cavedwelling evening primrose | Oenothera cavernae | OECA5 | Onagraceae | Dicot |
| cavedwelling primrose | Primula specuicola | PRSP2 | Primulaceae | Dicot |
| cayenne pepper | Capsicum annuum | CAAN4 | Solanaceae | Dicot |
| cayenne pepper | Capsicum annuum var. annuum | CAANA4 | Solanaceae | Dicot |
| ceanothus | Ceanothus | CEANO | Rhamnaceae | Dicot |
| Cedar Breaks milkvetch | Astragalus limnocharis | ASLI3 | Fabaceae | Dicot |
| Cedar Breaks milkvetch | Astragalus limnocharis var. limnocharis | ASLIL2 | Fabaceae | Dicot |
| Cedar Breaks springparsley | Cymopterus minimus | CYMI2 | Apiaceae | Dicot |
| Cedar Mountain fameflower | Phemeranthus thompsonii | PHTH6 | Portulacaceae | Dicot |
| celandine | Chelidonium | CHELI | Papaveraceae | Dicot |
| celandine | Chelidonium majus | CHMA2 | Papaveraceae | Dicot |
| celandine | Chelidonium majus var. majus | CHMAM | Papaveraceae | Dicot |
| celery | Apium | APIUM | Apiaceae | Dicot |
| centaury | Centaurium | CENTA2 | Gentianaceae | Dicot |
| centranthus | Centranthus | CENTR | Valerianaceae | Dicot |
| centrostegia | Centrostegia | CENTR4 | Polygonaceae | Dicot |
| cereal rye | Secale cereale | SECE | Poaceae | Monocot |
| cerro hawthorn | Crataegus erythropoda | CRER | Rosaceae | Dicot |
| chaffbush | Amphipappus | AMPHI3 | Asteraceae | Dicot |
| chairmaker"s bulrush | Schoenoplectus americanus | SCAM6 | Cyperaceae | Monocot |
| chalk dudleya | Dudleya pulverulenta | DUPU | Crassulaceae | Dicot |
| chalk dudleya | Dudleya pulverulenta ssp. arizonica | DUPUA2 | Crassulaceae | Dicot |
| chamaechaenactis | Chamaechaenactis | CHAMA3 | Asteraceae | Dicot |
| Chambers" twinpod | Physaria chambersii | PHCH2 | Brassicaceae | Dicot |
| Chamisso arnica | Arnica chamissonis | ARCH3 | Asteraceae | Dicot |
| Chamisso arnica | Arnica chamissonis ssp. foliosa | ARCHF | Asteraceae | Dicot |
| Chamisso arnica | Arnica chamissonis ssp. foliosa var. andina | ARCHA2 | Asteraceae | Dicot |
| Chamisso arnica | Arnica chamissonis ssp. foliosa var. incana | ARCHI4 | Asteraceae | Dicot |
| chamisso sedge | Carex pachystachya | CAPA14 | Cyperaceae | Monocot |
| Chamisso"s cottongrass | Eriophorum chamissonis | ERCH7 | Cyperaceae | Monocot |
| chamomile | Anthemis | ANTHE | Asteraceae | Dicot |
| chaparral dodder | Cuscuta californica | CUCA | Cuscutaceae | Dicot |
| chaparral dodder | Cuscuta californica var. breviflora | CUCAB | Cuscutaceae | Dicot |
| chaparral dodder | Cuscuta californica var. californica | CUCAC | Cuscutaceae | Dicot |
| Charleston Mountain violet | Viola charlestonensis | VICH2 | Violaceae | Dicot |
| charlock mustard | Sinapis arvensis | SIAR4 | Brassicaceae | Dicot |
| charming woodyaster | Xylorhiza venusta | XYVE | Asteraceae | Dicot |
| cheatgrass | Bromus tectorum | BRTE | Poaceae | Monocot |
| checkerbloom | Sidalcea | SIDAL | Malvaceae | Dicot |
| cherry plum | Prunus cerasifera | PRCE2 | Rosaceae | Dicot |
| chestnut rush | Juncus castaneus | JUCA6 | Juncaceae | Monocot |
| chestnut rush | Juncus castaneus ssp. castaneus | JUCAC2 | Juncaceae | Monocot |
| chestnut rush | Juncus castaneus ssp. castaneus var. castaneus | JUCAC6 | Juncaceae | Monocot |
| chia | Salvia columbariae | SACO6 | Lamiaceae | Dicot |
| chia | Salvia columbariae var. argillacea | SACOA5 | Lamiaceae | Dicot |
| chia | Salvia columbariae var. columbariae | SACOC | Lamiaceae | Dicot |
| chickensage | Sphaeromeria | SPHAE3 | Asteraceae | Dicot |
| chickpea milkvetch | Astragalus cicer | ASCI4 | Fabaceae | Dicot |
| chicory | Cichorium | CICHO | Asteraceae | Dicot |
| chicory | Cichorium intybus | CIIN | Asteraceae | Dicot |
| Chilean chess | Bromus berteroanus | BRBE6 | Poaceae | Monocot |
| Chinaberrytree | Melia azedarach | MEAZ | Meliaceae | Dicot |
| chinchweed | Pectis | PECTI | Asteraceae | Dicot |
| Chinese lantern | Quincula lobata | QULO2 | Solanaceae | Dicot |
| Chinle saltbush | Atriplex asterocarpa | ATAS2 | Chenopodiaceae | Dicot |
| chionodoxa | Chionodoxa | CHION4 | Liliaceae | Monocot |
| chloracantha | Chloracantha | CHLOR6 | Asteraceae | Dicot |
| chlorocrambe | Chlorocrambe | CHLOR2 | Brassicaceae | Dicot |
| chokecherry | Prunus virginiana | PRVI | Rosaceae | Dicot |
| cholla | Cylindropuntia | CYLIN2 | Cactaceae | Dicot |
| cholla | Grusonia | GRUSO | Cactaceae | Dicot |
| chorispora | Chorispora | CHORI | Brassicaceae | Dicot |
| chuckwalla combseed | Pectocarya heterocarpa | PEHE | Boraginaceae | Dicot |
| cicada milkvetch | Astragalus chamaeleuce | ASCH4 | Fabaceae | Dicot |
| cicada milkvetch | Astragalus chamaeleuce var. chamaeleuce | ASCHC2 | Fabaceae | Dicot |
| cicada milkvetch | Astragalus chamaeleuce var. laccoliticus | ASCHL2 | Fabaceae | Dicot |
| cinquefoil | Potentilla | POTEN | Rosaceae | Dicot |
| Cisco milkvetch | Astragalus sabulosus | ASSA3 | Fabaceae | Dicot |
| Cisco milkvetch | Astragalus sabulosus var. sabulosus | ASSAS | Fabaceae | Dicot |
| Cisco milkvetch | Astragalus sabulosus var. vehiculus | ASSAV | Fabaceae | Dicot |
| clammy groundcherry | Physalis heterophylla | PHHE5 | Solanaceae | Dicot |
| clammy groundcherry | Physalis heterophylla var. heterophylla | PHHEH3 | Solanaceae | Dicot |
| clammy hedgehyssop | Gratiola neglecta | GRNE | Scrophulariaceae | Dicot |
| clammyweed | Polanisia | POLAN | Capparaceae | Dicot |
| clarkia | Clarkia | CLARK | Onagraceae | Dicot |
| clasping arnica | Arnica amplexicaulis | ARAM2 | Asteraceae | Dicot |
| clasping pepperweed | Lepidium perfoliatum | LEPE2 | Brassicaceae | Dicot |
| clasping Venus" looking-glass | Triodanis perfoliata | TRPE4 | Campanulaceae | Dicot |
| claspleaf twistedstalk | Streptopus amplexifolius | STAM2 | Liliaceae | Monocot |
| Clausen"s violet | Viola clauseniana | VICL | Violaceae | Dicot |
| clay hill buckwheat | Eriogonum viridulum | ERVI13 | Polygonaceae | Dicot |
| clay sand verbena | Abronia argillosa | ABAR | Nyctaginaceae | Dicot |
| Clear Creek fleabane | Erigeron religiosus | ERRE7 | Asteraceae | Dicot |
| Cleburn"s penstemon | Penstemon eriantherus var. cleburnei | PEERC | Scrophulariaceae | Dicot |
| cleft sedge | Carex fissuricola | CAFI2 | Cyperaceae | Monocot |
| cleftleaf phacelia | Phacelia crenulata var. angustifolia | PHCRA | Hydrophyllaceae | Dicot |
| cleftleaf wildheliotrope | Phacelia crenulata var. corrugata | PHCRC | Hydrophyllaceae | Dicot |
| cleftleaf wildheliotrope | Phacelia crenulata var. crenulata | PHCRC3 | Hydrophyllaceae | Dicot |
| cleftleaf wildheliotrope | Phacelia crenulata var. minutiflora | PHCRM | Hydrophyllaceae | Dicot |
| cleftleaf wildheliotrope | Phacelia crenulata | PHCR | Hydrophyllaceae | Dicot |
| cliff fendlerbush | Fendlera rupicola | FERU | Hydrangeaceae | Dicot |
| cliff fern | Woodsia | WOODS | Dryopteridaceae | Fern |
| cliff muhly | Muhlenbergia polycaulis | MUPO | Poaceae | Monocot |
| cliffbrake | Pellaea | PELLA | Pteridaceae | Fern |
| cliffbush | Jamesia | JAMES | Hydrangeaceae | Dicot |
| cliffdweller"s cryptantha | Cryptantha elata | CREL4 | Boraginaceae | Dicot |
| climbing nightshade | Solanum dulcamara | SODU | Solanaceae | Dicot |
| climbing nightshade | Solanum dulcamara var. dulcamara | SODUD | Solanaceae | Dicot |
| clinopodium | Clinopodium | CLINO | Lamiaceae | Dicot |
| cloaked bulrush | Scirpus pallidus | SCPA8 | Cyperaceae | Monocot |
| Clokey"s gilia | Gilia clokeyi | GICL2 | Polemoniaceae | Dicot |
| cloud sedge | Carex haydeniana | CAHA6 | Cyperaceae | Monocot |
| clover | Trifolium | TRIFO | Fabaceae | Dicot |
| clubmoss | Lycopodium | LYCOP2 | Lycopodiaceae | Lycopod |
| cluster mallow | Malva verticillata | MAVE | Malvaceae | Dicot |
| clustered broomrape | Orobanche fasciculata | ORFA | Orobanchaceae | Dicot |
| clustered field sedge | Carex praegracilis | CAPR5 | Cyperaceae | Monocot |
| clustered goldenweed | Pyrrocoma racemosa | PYRA | Asteraceae | Dicot |
| clustered goldenweed | Pyrrocoma racemosa var. paniculata | PYRAP2 | Asteraceae | Dicot |
| clustered goldenweed | Pyrrocoma racemosa var. sessiliflora | PYRAS | Asteraceae | Dicot |
| clustered lady"s slipper | Cypripedium fasciculatum | CYFA | Orchidaceae | Monocot |
| cnicus | Cnicus | CNICU | Asteraceae | Dicot |
| coastal tidytips | Layia platyglossa | LAPL | Asteraceae | Dicot |
| cock"s comb | Celosia | CELOS | Amaranthaceae | Dicot |
| cocklebur | Xanthium | XANTH2 | Asteraceae | Dicot |
| cockspur grass | Echinochloa | ECHIN4 | Poaceae | Monocot |