List of Montana Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| absinthium | Artemisia absinthium | ARAB3 | Asteraceae | Dicot |
| acinos | Acinos | ACINO | Lamiaceae | Dicot |
| acute Indian paintbrush | Castilleja hispida ssp. acuta | CAHIA2 | Scrophulariaceae | Dicot |
| adderstongue | Ophioglossum | OPHIO | Ophioglossaceae | Fern |
| adoxa | Adoxa | ADOXA | Adoxaceae | Dicot |
| African mustard | Malcolmia africana | MAAF | Brassicaceae | Dicot |
| agoseris | Agoseris | AGOSE | Asteraceae | Dicot |
| agrimony | Agrimonia | AGRIM | Rosaceae | Dicot |
| Alaska bluegrass | Poa paucispicula | POPA26 | Poaceae | Monocot |
| Alaska curved woodrush | Luzula arcuata ssp. unalaschcensis | LUARU | Juncaceae | Monocot |
| Alaska oniongrass | Melica subulata | MESU | Poaceae | Monocot |
| Alaska oniongrass | Melica subulata var. subulata | MESUS | Poaceae | Monocot |
| Alaskan wheatgrass | Elymus alaskanus | ELAL5 | Poaceae | Monocot |
| Alaskan wheatgrass | Elymus alaskanus ssp. latiglumis | ELALL | Poaceae | Monocot |
| Alberta beardtongue | Penstemon albertinus | PEAL11 | Scrophulariaceae | Dicot |
| Alberta saxifrage | Saxifraga occidentalis | SAOC4 | Saxifragaceae | 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 ssp. sativa | MESAS | Fabaceae | Dicot |
| alfalfa | Medicago sativa | MESA | Fabaceae | Dicot |
| alfalfa dodder | Cuscuta approximata | CUAP2 | Cuscutaceae | Dicot |
| aliciella | Aliciella | ALICI | Polemoniaceae | Dicot |
| alkali buttercup | Ranunculus cymbalaria | RACY | Ranunculaceae | Dicot |
| alkali cordgrass | Spartina gracilis | SPGR | Poaceae | Monocot |
| alkali marsh aster | Almutaster | ALMUT2 | Asteraceae | Dicot |
| alkali marsh aster | Almutaster pauciflorus | ALPA14 | Asteraceae | Dicot |
| alkali sacaton | Sporobolus airoides | SPAI | Poaceae | Monocot |
| alkali swainsonpea | Sphaerophysa salsula | SPSA3 | Fabaceae | Dicot |
| alkaligrass | Puccinellia | PUCCI | Poaceae | Monocot |
| Allegheny monkeyflower | Mimulus ringens | MIRI | Scrophulariaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens var. ringens | MIRIR | Scrophulariaceae | Dicot |
| alpine alumroot | Heuchera cylindrica var. alpina | HECYA | Saxifragaceae | Dicot |
| alpine bentgrass | Agrostis humilis | AGHU | Poaceae | Monocot |
| alpine bistort | Polygonum viviparum | POVI3 | Polygonaceae | Dicot |
| alpine bladderpod | Lesquerella alpina | LEAL | Brassicaceae | Dicot |
| alpine bladderpod | Lesquerella alpina var. alpina | LEALA5 | Brassicaceae | Dicot |
| alpine bladderpod | Lesquerella alpina var. spatulata | LEALS | Brassicaceae | Dicot |
| alpine bluebells | Mertensia alpina | MEAL7 | Boraginaceae | Dicot |
| alpine bluegrass | Poa alpina | POAL2 | Poaceae | Monocot |
| alpine bulrush | Trichophorum alpinum | TRAL7 | Cyperaceae | Monocot |
| alpine buttercup | Ranunculus adoneus | RAAD | Ranunculaceae | Dicot |
| alpine buttercup | Ranunculus adoneus var. alpinus | RAADA | Ranunculaceae | Dicot |
| alpine clover | Trifolium dasyphyllum | TRDA2 | Fabaceae | Dicot |
| alpine clubmoss | Lycopodium alpinum | LYAL3 | Lycopodiaceae | Lycopod |
| alpine collomia | Collomia debilis | CODE | Polemoniaceae | Dicot |
| alpine collomia | Collomia debilis var. camporum | CODEC | Polemoniaceae | Dicot |
| alpine collomia | Collomia debilis var. debilis | CODED | Polemoniaceae | Dicot |
| alpine collomia | Collomia debilis var. trifida | CODET | Polemoniaceae | Dicot |
| alpine dustymaiden | Chaenactis douglasii var. alpina | CHDOA2 | Asteraceae | Dicot |
| alpine fescue | Festuca brachyphylla | FEBR | Poaceae | Monocot |
| alpine fescue | Festuca brachyphylla ssp. brachyphylla | FEBRB | Poaceae | Monocot |
| alpine forget-me-not | Eritrichium | ERITR | Boraginaceae | Dicot |
| alpine golden buckwheat | Eriogonum flavum var. polyphyllum | ERFLP2 | Polygonaceae | Dicot |
| alpine golden buckwheat | Eriogonum flavum | ERFL4 | Polygonaceae | Dicot |
| alpine golden buckwheat | Eriogonum flavum var. flavum | ERFLF | Polygonaceae | Dicot |
| alpine groundsel | Packera pauciflora | PAPA19 | Asteraceae | 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 leafybract aster | Symphyotrichum foliaceum var. foliaceum | SYFOF | 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 pennycress | Noccaea fendleri ssp. glauca | NOFEG | Brassicaceae | Dicot |
| alpine phacelia | Phacelia lyallii | PHLY2 | Hydrophyllaceae | Dicot |
| alpine pondweed | Potamogeton alpinus | POAL8 | Potamogetonaceae | Monocot |
| alpine poppy | Papaver pygmaeum | PAPY | Papaveraceae | Dicot |
| alpine pussytoes | Antennaria alpina | ANAL4 | Asteraceae | Dicot |
| 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 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 sweetgrass | Anthoxanthum monticola | ANMO7 | Poaceae | Monocot |
| alpine sweetgrass | Anthoxanthum monticola ssp. alpinum | ANMOA3 | Poaceae | Monocot |
| alpine sweetgrass | Anthoxanthum monticola ssp. monticola | ANMOM2 | Poaceae | Monocot |
| alpine sweetvetch | Hedysarum alpinum | HEAL | Fabaceae | Dicot |
| alpine timothy | Phleum alpinum | PHAL2 | Poaceae | Monocot |
| alpine willow | Salix petrophila | SAPE18 | Salicaceae | Dicot |
| alpine yellowcress | Rorippa alpina | ROAL | Brassicaceae | 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 |
| alyssumleaf phlox | Phlox alyssifolia | PHAL3 | Polemoniaceae | Dicot |
| alyssumleaf phlox | Phlox alyssifolia ssp. alyssifolia | PHALA5 | Polemoniaceae | Dicot |
| alyssumleaf phlox | Phlox alyssifolia ssp. collina | PHALC | Polemoniaceae | Dicot |
| American alpine speedwell | Veronica wormskjoldii | VEWO2 | Scrophulariaceae | Dicot |
| American alpine speedwell | Veronica wormskjoldii var. wormskjoldii | VEWOW | Scrophulariaceae | Dicot |
| American bird"s-foot trefoil | Lotus unifoliolatus | LOUN | Fabaceae | Dicot |
| American bird"s-foot trefoil | Lotus unifoliolatus var. unifoliolatus | LOUNU | Fabaceae | Dicot |
| American bistort | Polygonum bistortoides | POBI6 | Polygonaceae | Dicot |
| American bittersweet | Celastrus scandens | CESC | Celastraceae | Dicot |
| American black currant | Ribes americanum | RIAM2 | Grossulariaceae | Dicot |
| American black elderberry | Sambucus nigra ssp. canadensis | SANIC4 | Caprifoliaceae | Dicot |
| American bugseed | Corispermum americanum | COAM8 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. americanum | COAMA2 | Chenopodiaceae | Dicot |
| American chickweed | Stellaria americana | STAM | Caryophyllaceae | Dicot |
| American common reed | Phragmites australis ssp. americanus | PHAUA6 | Poaceae | Monocot |
| American cranberrybush | Viburnum opulus var. americanum | VIOPA2 | Caprifoliaceae | Dicot |
| American dragonhead | Dracocephalum parviflorum | DRPA2 | Lamiaceae | Dicot |
| American dwarf mistletoe | Arceuthobium americanum | ARAM | Viscaceae | Dicot |
| American elm | Ulmus americana | ULAM | Ulmaceae | 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 hogpeanut | Amphicarpaea bracteata | AMBR2 | Fabaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata var. comosa | AMBRC | Fabaceae | 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 milkvetch | Astragalus americanus | ASAM3 | Fabaceae | Dicot |
| 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 saw-wort | Saussurea americana | SAAM3 | Asteraceae | Dicot |
| American skunkcabbage | Lysichiton americanus | LYAM3 | Araceae | Monocot |
| American sloughgrass | Beckmannia syzigachne | BESY | Poaceae | Monocot |
| American speedwell | Veronica americana | VEAM2 | Scrophulariaceae | Dicot |
| American spurred gentian | Halenia deflexa | HADE2 | Gentianaceae | Dicot |
| American spurred gentian | Halenia deflexa ssp. deflexa | HADED2 | Gentianaceae | Dicot |
| American stickseed | Hackelia deflexa var. americana | HADEA | Boraginaceae | Dicot |
| American thorow wax | Bupleurum americanum | BUAM2 | Apiaceae | Dicot |
| American trailplant | Adenocaulon bicolor | ADBI | Asteraceae | 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 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 |
| amerorchis | Amerorchis | AMERO | Orchidaceae | Monocot |
| analogue sedge | Carex simulata | CASI2 | Cyperaceae | Monocot |
| Anderson"s hollyfern | Polystichum andersonii | POAN2 | Dryopteridaceae | Fern |
| 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 buckwheat | Eriogonum annuum | ERAN4 | Polygonaceae | Dicot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual candytuft | Iberis amara | IBAM | Brassicaceae | Dicot |
| 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 rabbitsfoot grass | Polypogon monspeliensis | POMO5 | Poaceae | Monocot |
| annual ragweed | Ambrosia artemisiifolia | AMAR2 | Asteraceae | Dicot |
| annual ragweed | Ambrosia artemisiifolia var. elatior | AMARE | Asteraceae | Dicot |
| annual wallrocket | Diplotaxis muralis | DIMU2 | Brassicaceae | Dicot |
| annual wheatgrass | Eremopyrum triticeum | ERTR13 | Poaceae | Monocot |
| antelope bitterbrush | Purshia tridentata | PUTR2 | Rosaceae | Dicot |
| apetalous catchfly | Silene uralensis | SIUR | Caryophyllaceae | Dicot |
| apetalous catchfly | Silene uralensis ssp. attenuata | SIURA | Caryophyllaceae | Dicot |
| apetalous catchfly | Silene uralensis ssp. montana | SIURM | Caryophyllaceae | Dicot |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apricot | Prunus armeniaca | PRAR3 | Rosaceae | Dicot |
| arborvitae | Thuja | THUJA | Cupressaceae | Gymnosperm |
| 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. elongatum | ERNAE | Boraginaceae | Dicot |
| arctic aster | Eurybia sibirica | EUSI13 | Asteraceae | Dicot |
| arctic bellflower | Campanula uniflora | CAUN2 | Campanulaceae | Dicot |
| arctic bluegrass | Poa arctica | POAR2 | Poaceae | Monocot |
| arctic bluegrass | Poa arctica ssp. arctica | POARA2 | Poaceae | Monocot |
| arctic bluegrass | Poa arctica ssp. grayana | POARG | Poaceae | Monocot |
| arctic cinquefoil | Potentilla nana | PONA6 | Rosaceae | Dicot |
| arctic cottongrass | Eriophorum callitrix | ERCA13 | Cyperaceae | Monocot |
| arctic cottongrass | Eriophorum callitrix var. callitrix | ERCAC2 | Cyperaceae | Monocot |
| arctic eyebright | Euphrasia subarctica | EUSU2 | Scrophulariaceae | Dicot |
| arctic pearlwort | Sagina saginoides | SASA | Caryophyllaceae | Dicot |
| arctic raspberry | Rubus arcticus | RUAR | Rosaceae | Dicot |
| arctic rattlebox | Rhinanthus minor ssp. groenlandicus | RHMIG | Scrophulariaceae | Dicot |
| arctic rush | Juncus arcticus | JUAR2 | Juncaceae | Monocot |
| arctic sweet coltsfoot | Petasites frigidus | PEFR5 | Asteraceae | Dicot |
| arctic sweet coltsfoot | Petasites frigidus var. frigidus | PEFRF | Asteraceae | Dicot |
| arctic willow | Salix arctica | SAAR27 | Salicaceae | Dicot |
| aridland goosefoot | Chenopodium desiccatum | CHDE | Chenopodiaceae | Dicot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| arnica | Arnica | ARNIC | Asteraceae | Dicot |
| aromatic aster | Symphyotrichum oblongifolium | SYOB | Asteraceae | Dicot |
| arrow thelypody | Thelypodium sagittatum | THSA2 | 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 |
| arrowleaf rattlesnakeroot | Prenanthes sagittata | PRSA | Asteraceae | Dicot |
| arrowleaf sweet coltsfoot | Petasites frigidus var. sagittatus | PEFRS5 | Asteraceae | Dicot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| Asian forget-me-not | Myosotis asiatica | MYAS2 | Boraginaceae | Dicot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| 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 |
| aster | Eurybia | EURYB | Asteraceae | Dicot |
| aster | Eucephalus | EUCEP2 | Asteraceae | Dicot |
| aster | Ionactis | IONAC | Asteraceae | Dicot |
| aster | Oreostemma | OREOS | Asteraceae | Dicot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| Atkinson"s tickseed | Coreopsis tinctoria var. atkinsoniana | COTIA | Asteraceae | Dicot |
| Aunt Lucy | Ellisia nyctelea | ELNY | Hydrophyllaceae | Dicot |
| Austin knotweed | Polygonum douglasii ssp. austiniae | PODOA2 | Polygonaceae | Dicot |
| Austrian draba | Draba fladnizensis | DRFL | Brassicaceae | Dicot |
| Austrian draba | Draba fladnizensis var. fladnizensis | DRFLF2 | Brassicaceae | Dicot |
| Austrian yellowcress | Rorippa austriaca | ROAU | Brassicaceae | Dicot |
| autumn dwarf gentian | Gentianella amarella | GEAM3 | Gentianaceae | Dicot |
| autumn dwarf gentian | Gentianella amarella ssp. acuta | GEAMA | Gentianaceae | Dicot |
| autumn olive | Elaeagnus umbellata | ELUM | Elaeagnaceae | Dicot |
| autumn olive | Elaeagnus umbellata var. parvifolia | ELUMP | Elaeagnaceae | Dicot |
| autumn willow | Salix serissima | SASE2 | Salicaceae | Dicot |
| avens | Geum | GEUM | Rosaceae | Dicot |
| awl-leaf lilaea | Lilaea scilloides | LISC4 | Juncaginaceae | Monocot |
| awlfruit sedge | Carex stipata | CAST5 | Cyperaceae | Monocot |
| 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 |
| Back"s sedge | Carex backii | CABA3 | Cyperaceae | Monocot |
| badlands mule-ears | Scabrethia scabra | SCSC15 | Asteraceae | Dicot |
| badlands mule-ears | Scabrethia scabra ssp. scabra | SCSCS5 | Asteraceae | Dicot |
| Baffin fescue | Festuca baffinensis | FEBA | Poaceae | Monocot |
| bahia | Picradeniopsis | PICRA3 | Asteraceae | Dicot |
| Baker"s phacelia | Phacelia bakeri | PHBA3 | Hydrophyllaceae | Dicot |
| Baker"s wheatgrass | Elymus bakeri | ELBA3 | Poaceae | Monocot |
| bald brome | Bromus racemosus | BRRA2 | Poaceae | Monocot |
| Balkan catchfly | Silene csereii | SICS | Caryophyllaceae | Dicot |
| 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. pseudotypica | IPCOP2 | Polemoniaceae | Dicot |
| ballhead ragwort | Senecio sphaerocephalus | SESP4 | Asteraceae | Dicot |
| ballhead sandwort | Arenaria congesta var. congesta | ARCOC4 | Caryophyllaceae | Dicot |
| ballhead sandwort | Arenaria congesta | ARCO5 | Caryophyllaceae | Dicot |
| ballhead waterleaf | Hydrophyllum capitatum | HYCA4 | Hydrophyllaceae | Dicot |
| ballhead waterleaf | Hydrophyllum capitatum var. capitatum | HYCAC | Hydrophyllaceae | Dicot |
| balm | Melissa | MELIS | Lamiaceae | Dicot |
| balm-of-Gilead | Populus ×jackii | POJA2 | Salicaceae | Dicot |
| balsam groundsel | Packera paupercula | PAPA20 | Asteraceae | Dicot |
| balsam poplar | Populus balsamifera | POBA2 | Salicaceae | Dicot |
| balsam poplar | Populus balsamifera ssp. balsamifera | POBAB2 | Salicaceae | Dicot |
| balsamroot | Balsamorhiza ×tomentosa | BATO2 | Asteraceae | Dicot |
| balsamroot | Balsamorhiza | BALSA | Asteraceae | Dicot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| Banff bluegrass | Poa laxa ssp. banffiana | POLAB | Poaceae | Monocot |
| barberry | Mahonia | MAHON | Berberidaceae | Dicot |
| barberry | Berberis | BERBE | Berberidaceae | Dicot |
| Barclay"s willow | Salix barclayi | SABA3 | Salicaceae | Dicot |
| barley | Hordeum | HORDE | Poaceae | Monocot |
| barley | ×Elyhordeum | ELYHO | Poaceae | Monocot |
| barnyardgrass | Echinochloa crus-galli | ECCR | Poaceae | Monocot |
| Barr"s milkvetch | Astragalus barrii | ASBA | Fabaceae | Dicot |
| Barratt"s willow | Salix barrattiana | SABA4 | Salicaceae | Dicot |
| barren strawberry | Waldsteinia | WALDS | Rosaceae | Dicot |
| basil thyme | Acinos arvensis | ACAR2 | Lamiaceae | Dicot |
| basin big sagebrush | Artemisia tridentata ssp. tridentata | ARTRT | Asteraceae | Dicot |
| basin cryptantha | Cryptantha ambigua | CRAM3 | Boraginaceae | Dicot |
| basin nemophila | Nemophila breviflora | NEBR | Hydrophyllaceae | Dicot |
| basin wildrye | Leymus cinereus | LECI4 | Poaceae | Monocot |
| basindaisy | Platyschkuhria | PLATY5 | Asteraceae | Dicot |
| basindaisy | Platyschkuhria integrifolia | PLIN7 | Asteraceae | Dicot |
| basindaisy | Platyschkuhria integrifolia var. integrifolia | PLINI | Asteraceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bay forget-me-not | Myosotis laxa | MYLA | Boraginaceae | Dicot |
| beaked hazelnut | Corylus cornuta | COCO6 | Betulaceae | Dicot |
| beaked hazelnut | Corylus cornuta var. cornuta | COCOC2 | Betulaceae | Dicot |
| beaked sedge | Carex rostrata | CARO6 | Cyperaceae | Monocot |
| beaked spikerush | Eleocharis rostellata | ELRO2 | Cyperaceae | Monocot |
| bean | Phaseolus | PHASE | Fabaceae | Dicot |
| beancaper | Zygophyllum | ZYGOP | Zygophyllaceae | Dicot |
| Bear River fleabane | Erigeron ursinus | ERUR2 | Asteraceae | Dicot |
| beard lichen | Usnea | USNEA2 | Parmeliaceae | Lichen |
| bearded fescue | Festuca subulata | FESU | Poaceae | Monocot |
| bearded flatsedge | Cyperus squarrosus | CYSQ | Cyperaceae | Monocot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| beardless wheatgrass | Pseudoroegneria spicata ssp. inermis | PSSPI | Poaceae | Monocot |
| beardless wildrye | Leymus triticoides | LETR5 | Poaceae | Monocot |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| beargrass | Xerophyllum | XEROP | Liliaceae | Monocot |
| beautiful alumroot | Heuchera cylindrica var. glabella | HECYG | Saxifragaceae | Dicot |
| beautiful bladderpod | Lesquerella pulchella | LEPU15 | Brassicaceae | Dicot |
| beautiful bluebells | Mertensia bella | MEBE | Boraginaceae | Dicot |
| beautiful cinquefoil | Potentilla pulcherrima | POPU9 | Rosaceae | Dicot |
| beautiful fleabane | Erigeron formosissimus | ERFO3 | Asteraceae | Dicot |
| beautiful Indian paintbrush | Castilleja pulchella | CAPU10 | Scrophulariaceae | Dicot |
| beautiful sandwort | Minuartia rubella | MIRU3 | Caryophyllaceae | Dicot |
| beautiful spikerush | Eleocharis bella | ELBE | Cyperaceae | Monocot |
| beavertip draba | Draba globosa | DRGL6 | Brassicaceae | Dicot |
| Bebb willow | Salix bebbiana | SABE2 | Salicaceae | Dicot |
| Bebb"s sedge | Carex bebbii | CABE2 | Cyperaceae | Monocot |
| Beck"s water-marigold | Bidens beckii | BIBE2 | Asteraceae | Dicot |
| Beckwith"s clover | Trifolium beckwithii | TRBE2 | Fabaceae | Dicot |
| bedstraw | Cruciata | CRUCI2 | Rubiaceae | Dicot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| beebalm | Monarda | MONAR | Lamiaceae | Dicot |
| beeblossom | Gaura | GAURA | Onagraceae | Dicot |
| beechfern | Phegopteris | PHEGO | Thelypteridaceae | Fern |
| 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 milkvetch | Astragalus inflexus | ASIN5 | Fabaceae | Dicot |
| bentflower milkvetch | Astragalus vexilliflexus | ASVE5 | Fabaceae | Dicot |
| bentflower milkvetch | Astragalus vexilliflexus var. vexilliflexus | ASVEV2 | Fabaceae | Dicot |
| bentgrass | Agrostis | AGROS2 | Poaceae | Monocot |
| 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. besseyi | OXBEB | Fabaceae | Dicot |
| Bessey"s locoweed | Oxytropis besseyi var. fallax | OXBEF | Fabaceae | Dicot |
| Bessey"s locoweed | Oxytropis besseyi var. ventosa | OXBEV | Fabaceae | Dicot |
| biannual lettuce | Lactuca ludoviciana | LALU | Asteraceae | Dicot |
| Bicknell"s cranesbill | Geranium bicknellii | GEBI2 | Geraniaceae | Dicot |
| biennial cinquefoil | Potentilla biennis | POBI7 | Rosaceae | Dicot |
| biennial wormwood | Artemisia biennis | ARBI2 | Asteraceae | Dicot |
| biennial wormwood | Artemisia biennis var. biennis | ARBIB | Asteraceae | Dicot |
| big bluestem | Andropogon gerardii | ANGE | Poaceae | Monocot |
| big chickweed | Cerastium fontanum ssp. vulgare | CEFOV2 | Caryophyllaceae | Dicot |
| big devils beggartick | Bidens vulgata | BIVU | Asteraceae | Dicot |
| Big Horn fleabane | Erigeron allocotus | ERAL13 | Asteraceae | Dicot |
| big sagebrush | Artemisia tridentata | ARTR2 | Asteraceae | Dicot |
| big sagebrush | Artemisia tridentata ssp. spiciformis | ARTRS2 | Asteraceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| Bigelow"s sedge | Carex bigelowii | CABI5 | Cyperaceae | Monocot |
| bigflower agoseris | Agoseris grandiflora | AGGR | Asteraceae | Dicot |
| bigflower cinquefoil | Potentilla fissa | POFI3 | Rosaceae | Dicot |
| bigflower tellima | Tellima grandiflora | TEGR2 | Saxifragaceae | Dicot |
| bigfruit dodder | Cuscuta megalocarpa | CUME4 | Cuscutaceae | Dicot |
| bighead knapweed | Centaurea macrocephala | CEMA9 | Asteraceae | Dicot |
| bighead pygmycudweed | Evax prolifera | EVPR | Asteraceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus | LUPO2 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus | LUPOP2 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus var. polyphyllus | LUPOP4 | Fabaceae | Dicot |
| bigleaf sedge | Carex amplifolia | CAAM10 | Cyperaceae | 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 |
| Bingen lupine | Lupinus bingenensis | LUBI3 | Fabaceae | Dicot |
| Bingen lupine | Lupinus bingenensis var. subsaccatus | LUBIS | Fabaceae | Dicot |
| birch | Betula ×utahensis | BEUT | Betulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| birchleaf mountain mahogany | Cercocarpus montanus var. glaber | CEMOG | Rosaceae | 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 |
| birdeye pearlwort | Sagina procumbens | SAPR | Caryophyllaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdfoot sagebrush | Artemisia pedatifida | ARPE6 | Asteraceae | Dicot |
| bishop"s goutweed | Aegopodium podagraria | AEPO | Apiaceae | Dicot |
| bitter cherry | Prunus emarginata | PREM | Rosaceae | Dicot |
| bitter cherry | Prunus emarginata var. emarginata | PREME | Rosaceae | 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 fleabane | Erigeron acris ssp. politus | ERACP2 | Asteraceae | Dicot |
| bitter root | Lewisia rediviva | LERE7 | Portulacaceae | Dicot |
| bitter root | Lewisia rediviva var. rediviva | LERER | Portulacaceae | Dicot |
| bitter root draba | Draba daviesiae | DRDA | Brassicaceae | Dicot |
| bitterbrush | Purshia | PURSH | Rosaceae | Dicot |
| bittercress | Cardamine | CARDA | Brassicaceae | Dicot |
| Bitterroot milkvetch | Astragalus scaphoides | ASSC4 | Fabaceae | Dicot |
| bittersweet | Celastrus | CELAS | Celastraceae | 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 hawthorn | Crataegus douglasii | CRDO2 | Rosaceae | Dicot |
| 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 |
| blackandwhite sedge | Carex albonigra | CAAL6 | Cyperaceae | Monocot |
| blackberry | Rubus | RUBUS | 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 |
| blackroot sedge | Carex elynoides | CAEL3 | Cyperaceae | Monocot |
| blacksamson echinacea | Echinacea angustifolia | ECAN2 | Asteraceae | Dicot |
| blacksamson echinacea | Echinacea angustifolia var. angustifolia | ECANA | Asteraceae | Dicot |
| blackseed plantain | Plantago rugelii | PLRU | Plantaginaceae | Dicot |
| blackseed plantain | Plantago rugelii var. rugelii | PLRUR | Plantaginaceae | Dicot |
| blackspot hornpoppy | Glaucium corniculatum | GLCO3 | Papaveraceae | Dicot |
| bladder campion | Silene latifolia | SILA21 | Caryophyllaceae | Dicot |
| bladder campion | Silene latifolia ssp. alba | SILAA3 | Caryophyllaceae | Dicot |
| bladderfern | Cystopteris | CYSTO | Dryopteridaceae | Fern |
| bladderpod | Lesquerella | LESQU | Brassicaceae | Dicot |
| bladderwort | Utricularia | UTRIC | Lentibulariaceae | Dicot |
| blanketflower | Gaillardia | GAILL | Asteraceae | Dicot |
| blanketflower | Gaillardia aristata | GAAR | Asteraceae | Dicot |
| blazing star | Liatris | LIATR | Asteraceae | Dicot |
| blazingstar | Mentzelia | MENTZ | Loasaceae | Dicot |
| bleeding heart | Dicentra | DICEN | Fumariaceae | Dicot |
| blister sedge | Carex vesicaria | CAVE6 | Cyperaceae | Monocot |
| blite goosefoot | Chenopodium capitatum | CHCA4 | Chenopodiaceae | Dicot |
| blooddrops | Adonis annua | ADAN | Ranunculaceae | Dicot |
| Bloom Peak dwarf-primrose | Douglasia conservatorum | DOCO7 | Primulaceae | Dicot |
| blowout grass | Redfieldia | REDFI | Poaceae | Monocot |
| blowout grass | Redfieldia flexuosa | REFL | Poaceae | Monocot |
| blue elderberry | Sambucus nigra ssp. cerulea | SANIC5 | Caprifoliaceae | Dicot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue flax | Linum perenne | LIPE2 | Linaceae | Dicot |
| blue giant hyssop | Agastache foeniculum | AGFO | Lamiaceae | 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 limestone columbine | Aquilegia jonesii var. elatior | AQJOE | Ranunculaceae | Dicot |
| Blue Mountain buckwheat | Eriogonum strictum | ERST4 | Polygonaceae | Dicot |
| Blue Mountain buckwheat | Eriogonum strictum ssp. proliferum | ERSTP | Polygonaceae | Dicot |
| Blue Mountain buckwheat | Eriogonum strictum ssp. proliferum var. proliferum | ERSTP3 | Polygonaceae | Dicot |
| blue nodding locoweed | Oxytropis deflexa var. sericea | OXDES | Fabaceae | Dicot |
| blue penstemon | Penstemon cyaneus | PECY3 | Scrophulariaceae | Dicot |
| Blue Ridge carrionflower | Smilax lasioneura | SMLA3 | Smilacaceae | Monocot |
| blue skullcap | Scutellaria lateriflora | SCLA2 | Lamiaceae | Dicot |
| blue skullcap | Scutellaria lateriflora var. lateriflora | SCLAL2 | Lamiaceae | Dicot |
| blue wildrye | Elymus glaucus | ELGL | Poaceae | Monocot |
| blue wildrye | Elymus glaucus ssp. glaucus | ELGLG | Poaceae | Monocot |
| blue-eyed grass | Sisyrinchium | SISYR | Iridaceae | Monocot |
| bluebead | Clintonia | CLINT | Liliaceae | Monocot |
| bluebell bellflower | Campanula rotundifolia | CARO2 | Campanulaceae | Dicot |
| bluebells | Mertensia | MERTE | Boraginaceae | Dicot |
| blueberry | Vaccinium | VACCI | Ericaceae | Dicot |
| bluebunch wheatgrass | Pseudoroegneria spicata ssp. spicata | PSSPS | Poaceae | Monocot |
| bluebunch wheatgrass | Pseudoroegneria spicata | PSSP6 | Poaceae | Monocot |
| bluecup | Githopsis | GITHO | Campanulaceae | Dicot |
| bluedome primrose | Primula alcalina | PRAL6 | Primulaceae | Dicot |
| bluefly honeysuckle | Lonicera caerulea var. cauriana | LOCAC3 | Caprifoliaceae | Dicot |
| bluegrass | Poa | POA | Poaceae | Monocot |
| bluegrass | Poa ×nematophylla | PONE18 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis | CACA4 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis var. canadensis | CACAC10 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis var. langsdorffii | CACAL3 | Poaceae | Monocot |
| bluestem | Andropogon | ANDRO2 | Poaceae | Monocot |
| bluntleaf pondweed | Potamogeton obtusifolius | POOB2 | Potamogetonaceae | Monocot |
| bluntleaf sandwort | Moehringia lateriflora | MOLA6 | Caryophyllaceae | Dicot |
| 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 |
| bog birch | Betula pumila | BEPU4 | Betulaceae | Dicot |
| bog birch | Betula pumila var. glandulifera | BEPUG | Betulaceae | Dicot |
| bog blueberry | Vaccinium uliginosum | VAUL | Ericaceae | Dicot |
| bog laurel | Kalmia polifolia | KAPO | Ericaceae | Dicot |
| bog sedge | Kobresia | KOBRE | Cyperaceae | Monocot |
| bog willowherb | Epilobium leptophyllum | EPLE2 | Onagraceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| Boivin"s rockcress | Arabis boivinii | ARBO7 | Brassicaceae | Dicot |
| Bolander"s quillwort | Isoetes bolanderi | ISBO | Isoetaceae | Quillwort |
| Bolander"s sedge | Carex bolanderi | CABO2 | Cyperaceae | Monocot |
| Bonneville shootingstar | Dodecatheon conjugens | DOCO | Primulaceae | Dicot |
| Bonneville shootingstar | Dodecatheon conjugens ssp. conjugens | DOCOC3 | Primulaceae | Dicot |
| Bonneville shootingstar | Dodecatheon conjugens ssp. viscidum | DOCOV2 | Primulaceae | Dicot |
| Booth"s willow | Salix boothii | SABO2 | Salicaceae | Dicot |
| borage | Borago | BORAG | Boraginaceae | Dicot |
| boreal bog sedge | Carex magellanica | CAMA12 | Cyperaceae | Monocot |
| boreal bog sedge | Carex magellanica ssp. irrigua | CAMAI2 | Cyperaceae | Monocot |
| boreal draba | Draba borealis | DRBO | Brassicaceae | Dicot |
| boreal locoweed | Oxytropis borealis | OXBO | 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 |
| Borsch stonecrop | Sedum borschii | SEBO2 | Crassulaceae | Dicot |
| bottlebrush sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| Bourgeau"s pepperweed | Lepidium ramosissimum var. bourgeauanum | LERAB2 | Brassicaceae | Dicot |
| Bourgov"s milkvetch | Astragalus bourgovii | ASBO3 | Fabaceae | Dicot |
| box knotweed | Polygonum buxiforme | POBU2 | Polygonaceae | Dicot |
| boxelder | Acer negundo | ACNE2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. interius | ACNEI2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. violaceum | ACNEV | Aceraceae | Dicot |
| brackenfern | Pteridium | PTERI | Dennstaedtiaceae | Fern |
| bracted lousewort | Pedicularis bracteosa | PEBR | Scrophulariaceae | Dicot |
| bracted lousewort | Pedicularis bracteosa var. bracteosa | PEBRB | Scrophulariaceae | Dicot |
| bractless blazingstar | Mentzelia nuda | MENU | Loasaceae | Dicot |
| bractless blazingstar | Mentzelia nuda var. stricta | MENUS | Loasaceae | Dicot |
| bractless hedgehyssop | Gratiola ebracteata | GREB | Scrophulariaceae | Dicot |
| branched bur-reed | Sparganium androcladum | SPAN | Sparganiaceae | Monocot |
| branched cinquefoil | Potentilla effusa | POEF | Rosaceae | Dicot |
| branched false goldenweed | Oonopsis multicaulis | OOMU | Asteraceae | Dicot |
| branched lagophylla | Lagophylla ramosissima | LARA | Asteraceae | Dicot |
| branched lagophylla | Lagophylla ramosissima ssp. ramosissima | LARAR | Asteraceae | Dicot |
| Brandegee"s onion | Allium brandegeei | ALBR | Liliaceae | Monocot |
| brasenia | Brasenia | BRASE | Cabombaceae | 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 miterwort | Mitella breweri | MIBR6 | Saxifragaceae | Dicot |
| Brewer"s monkeyflower | Mimulus breweri | MIBR5 | Scrophulariaceae | Dicot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| bride"s bonnet | Clintonia uniflora | CLUN2 | Liliaceae | Monocot |
| Bridger Mountain alumroot | Heuchera flabellifolia | HEFL14 | Saxifragaceae | Dicot |
| Bridger Mountain alumroot | Heuchera flabellifolia var. flabellifolia | HEFLF | Saxifragaceae | Dicot |
| brightblue speedwell | Veronica serpyllifolia ssp. humifusa | VESEH2 | Scrophulariaceae | Dicot |
| brightgreen spleenwort | Asplenium trichomanes-ramosum | ASTR10 | Aspleniaceae | Fern |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristleleaf sedge | Carex eburnea | CAEB2 | Cyperaceae | Monocot |
| bristly dogstail grass | Cynosurus echinatus | CYEC | Poaceae | Monocot |
| 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 Nootka rose | Rosa nutkana var. hispida | RONUH | Rosaceae | Dicot |
| bristly oxtongue | Picris echioides | PIEC | Asteraceae | Dicot |
| bristlystalked sedge | Carex leptalea | CALE10 | Cyperaceae | Monocot |
| bristlystalked sedge | Carex leptalea ssp. leptalea | CALEL4 | Cyperaceae | Monocot |
| British Columbia wildginger | Asarum caudatum | ASCA2 | Aristolochiaceae | Dicot |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle pricklypear | Opuntia fragilis | OPFR | Cactaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit | GATE2 | Lamiaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit var. tetrahit | GATET2 | Lamiaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius | PEAN4 | Scrophulariaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius var. angustifolius | PEANA2 | Scrophulariaceae | Dicot |
| broadfruit bur-reed | Sparganium eurycarpum | SPEU | Sparganiaceae | Monocot |
| broadkeel milkvetch | Astragalus platytropis | ASPL3 | Fabaceae | Dicot |
| broadleaf arnica | Arnica latifolia | ARLA8 | Asteraceae | Dicot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf cattail | Typha latifolia | TYLA | Typhaceae | Monocot |
| broadleaf helleborine | Epipactis helleborine | EPHE | Orchidaceae | Monocot |
| broadleaf knotweed | Polygonum minimum | POMI2 | Polygonaceae | Dicot |
| broadleaved pepperweed | Lepidium latifolium | LELA2 | Brassicaceae | Dicot |
| broadlipped twayblade | Listera convallarioides | LICO5 | Orchidaceae | Monocot |
| broadscale sedge | Carex platylepis | CAPL8 | Cyperaceae | Monocot |
| broadtooth lady"s mantle | Alchemilla subcrenata | ALSU2 | Rosaceae | 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 |
| brookfoam | Boykinia | BOYKI | Saxifragaceae | 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 |
| broomcorn millet | Panicum miliaceum ssp. miliaceum | PAMIM | Poaceae | Monocot |
| broomrape | Orobanche | OROBA | Orobanchaceae | Dicot |
| brown mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| brown sedge | Carex subfusca | CASU6 | Cyperaceae | Monocot |
| Brown"s peony | Paeonia brownii | PABR | Paeoniaceae | Dicot |
| brownish sedge | Carex brunnescens | CABR15 | Cyperaceae | Monocot |
| brownish sedge | Carex brunnescens ssp. sphaerostachya | CABRS | Cyperaceae | Monocot |
| brownray knapweed | Centaurea jacea | CEJA | Asteraceae | Dicot |
| browse milkvetch | Astragalus cibarius | ASCI2 | Fabaceae | Dicot |
| Bruneau mariposa lily | Calochortus bruneaunis | CABR4 | Liliaceae | Monocot |
| bryony | Bryonia | BRYON | Cucurbitaceae | Dicot |
| buckbean | Menyanthes | MENYA | Menyanthaceae | Dicot |
| buckbean | Menyanthes trifoliata | METR3 | Menyanthaceae | Dicot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckwheat | Eriogonum | ERIOG | Polygonaceae | Dicot |
| buckwheat | Fagopyrum | FAGOP2 | Polygonaceae | Dicot |
| buckwheat | Fagopyrum esculentum | FAES2 | Polygonaceae | Dicot |
| buckwheat | Stenogonum | STENO5 | Polygonaceae | Dicot |
| bud sagebrush | Picrothamnus | PICRO | Asteraceae | Dicot |
| bud sagebrush | Picrothamnus desertorum | PIDE4 | Asteraceae | Dicot |
| Buek"s groundsel | Packera subnuda | PASU40 | Asteraceae | Dicot |
| buff fleabane | Erigeron ochroleucus | EROC | 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 |
| bugloss | Anchusa | ANCHU | Boraginaceae | Dicot |
| buglossoides | Buglossoides | BUGLO | Boraginaceae | Dicot |
| bugseed | Corispermum | CORIS | Chenopodiaceae | Dicot |
| bulbil onion | Allium geyeri var. tenerum | ALGET | Liliaceae | Monocot |
| bulblet-bearing water hemlock | Cicuta bulbifera | CIBU | Apiaceae | Dicot |
| bulbous bluegrass | Poa bulbosa | POBU | Poaceae | Monocot |
| bulbous canarygrass | Phalaris aquatica | PHAQ | Poaceae | Monocot |
| bulbous woodland-star | Lithophragma glabrum | LIGL2 | Saxifragaceae | Dicot |
| bull mallow | Malva nicaeensis | MANI2 | Malvaceae | Dicot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bulrush | Trichophorum | TRICH22 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus ×oblongus | SCOB10 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bunchberry dogwood | Cornus canadensis | COCA13 | Cornaceae | Dicot |
| bupleurum | Bupleurum | BUPLE | Apiaceae | Dicot |
| bur oak | Quercus macrocarpa | QUMA2 | Fagaceae | Dicot |
| bur oak | Quercus macrocarpa var. depressa | QUMAD | Fagaceae | Dicot |
| bur oak | Quercus macrocarpa var. macrocarpa | QUMAM | Fagaceae | Dicot |
| bur-reed | Sparganium | SPARG | Sparganiaceae | Monocot |
| burclover | Medicago polymorpha | MEPO3 | Fabaceae | Dicot |
| burdock | Arctium | ARCTI | Asteraceae | Dicot |
| burnet | Sanguisorba | SANGU2 | Rosaceae | Dicot |
| burnet saxifrage | Pimpinella | PIMPI | Apiaceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burningbush | Euonymus alatus | EUAL13 | Celastraceae | Dicot |
| burningbush | Euonymus alatus var. alatus | EUALA2 | Celastraceae | Dicot |
| burningbush | Euonymus atropurpureus | EUAT5 | Celastraceae | Dicot |
| bush morning-glory | Ipomoea leptophylla | IPLE | Convolvulaceae | Dicot |
| bush penstemon | Penstemon fruticosus | PEFR3 | Scrophulariaceae | Dicot |
| bush penstemon | Penstemon fruticosus var. fruticosus | PEFRF4 | Scrophulariaceae | Dicot |
| bushy bird"s beak | Cordylanthus ramosus | CORA5 | Scrophulariaceae | Dicot |
| bushy blazingstar | Mentzelia dispersa var. dispersa | MEDID | Loasaceae | Dicot |
| bushy blazingstar | Mentzelia dispersa | MEDI | Loasaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum | PORA3 | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. ramosissimum | PORAR | Polygonaceae | Dicot |
| butomus | Butomus | BUTOM | Butomaceae | Monocot |
| buttecandle | Cryptantha celosioides | CRCE | Boraginaceae | Dicot |
| butter and eggs | Linaria vulgaris | LIVU2 | Scrophulariaceae | Dicot |
| butterbur | Petasites | PETAS | Asteraceae | Dicot |
| buttercup | Ranunculus | RANUN | Ranunculaceae | Dicot |
| buttercup suksdorfia | Suksdorfia ranunculifolia | SURA | Saxifragaceae | Dicot |
| butterwort | Pinguicula | PINGU | Lentibulariaceae | Dicot |
| Buxbaum"s sedge | Carex buxbaumii | CABU6 | Cyperaceae | Monocot |
| cabbage | Brassica oleracea | BROL | Brassicaceae | Dicot |
| calicoflower | Downingia | DOWNI | Campanulaceae | Dicot |
| California amaranth | Amaranthus californicus | AMCA | Amaranthaceae | Dicot |
| California blackberry | Rubus ursinus | RUUR | Rosaceae | Dicot |
| California blackberry | Rubus ursinus ssp. macropetalus | RUURM | Rosaceae | Dicot |
| California butterwort | Pinguicula macroceras | PIMA7 | Lentibulariaceae | Dicot |
| California butterwort | Pinguicula macroceras var. macroceras | PIMAM2 | Lentibulariaceae | 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 Indian potato | Orogenia fusiformis | ORFU | Apiaceae | Dicot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| California oatgrass | Danthonia californica | DACA3 | Poaceae | Monocot |
| California waterwort | Elatine californica | ELCA | Elatinaceae | Dicot |
| camas | Camassia | CAMAS | Liliaceae | Monocot |
| campion | Lychnis | LYCHN | Caryophyllaceae | 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 altissima | SOAL6 | Asteraceae | Dicot |
| Canada goldenrod | Solidago canadensis | SOCA6 | Asteraceae | Dicot |
| Canada goldenrod | Solidago canadensis var. lepida | SOCAL | Asteraceae | Dicot |
| Canada lettuce | Lactuca canadensis | LACA | Asteraceae | Dicot |
| Canada mayflower | Maianthemum canadense | MACA4 | Liliaceae | Monocot |
| Canada thistle | Cirsium arvense | CIAR4 | Asteraceae | Dicot |
| Canada wildrye | Elymus canadensis | ELCA4 | Poaceae | Monocot |
| Canadian anemone | Anemone canadensis | ANCA8 | Ranunculaceae | Dicot |
| Canadian gooseberry | Ribes oxyacanthoides | RIOX | Grossulariaceae | Dicot |
| Canadian gooseberry | Ribes oxyacanthoides ssp. oxyacanthoides | RIOXO | 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 |
| canary violet | Viola praemorsa | VIPR3 | Violaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| Canby"s aster | Symphyotrichum foliaceum var. canbyi | SYFOC | Asteraceae | Dicot |
| Canby"s licorice-root | Ligusticum canbyi | LICA2 | Apiaceae | Dicot |
| Canby"s lousewort | Pedicularis bracteosa var. canbyi | PEBRC | Scrophulariaceae | Dicot |
| cancerwort | Kickxia | KICKX | Scrophulariaceae | Dicot |
| candle anemone | Anemone cylindrica | ANCY | Ranunculaceae | Dicot |
| candytuft | Iberis | IBERI | Brassicaceae | Dicot |
| candytuft | Smelowskia | SMELO | Brassicaceae | Dicot |
| Canterbury bells | Campanula medium | CAME20 | Campanulaceae | Dicot |
| Cape-ivy | Delairea | DELAI2 | Asteraceae | Dicot |
| Cape-ivy | Delairea odorata | DEOD | Asteraceae | 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 |
| carelessweed | Cyclachaena | CYCLA4 | Asteraceae | Dicot |
| Carelessweed | Cyclachaena xanthiifolia | CYXA2 | Asteraceae | 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 geranium | Geranium carolinianum var. sphaerospermum | GECAS | Geraniaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. canescens | PHHOC | Polemoniaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. glabrata | PHHOG | Polemoniaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. viscidula | PHHOV | Polemoniaceae | Dicot |
| carpetweed | Mollugo | MOLLU | Molluginaceae | Dicot |
| carrotleaf biscuitroot | Lomatium dissectum var. multifidum | LODIM | Apiaceae | Dicot |
| carum | Carum | CARUM | Apiaceae | Dicot |
| Cary"s beardtongue | Penstemon caryi | PECA17 | Scrophulariaceae | Dicot |
| Cascade azalea | Rhododendron albiflorum | RHAL2 | Ericaceae | Dicot |
| Cascade azalea | Rhododendron albiflorum var. albiflorum | RHALA | Ericaceae | Dicot |
| Cascade rockbrake | Cryptogramma cascadensis | CRCA23 | Pteridaceae | Fern |
| cascade willow | Salix cascadensis | SACA6 | Salicaceae | Dicot |
| Cascara buckthorn | Frangula purshiana | FRPU7 | Rhamnaceae | Dicot |
| Cascara buckthorn | Frangula purshiana ssp. purshiana | FRPUP | Rhamnaceae | Dicot |
| cat"s ear | Hypochaeris | HYPOC | Asteraceae | Dicot |
| catchfly | Silene | SILEN | Caryophyllaceae | Dicot |
| catchfly prairie gentian | Eustoma exaltatum | EUEX5 | Gentianaceae | Dicot |
| catnip | Nepeta | NEPET | Lamiaceae | Dicot |
| catnip | Nepeta cataria | NECA2 | Lamiaceae | Dicot |
| cattail | Typha | TYPHA | Typhaceae | Monocot |
| ceanothus | Ceanothus | CEANO | Rhamnaceae | Dicot |
| celandine | Chelidonium | CHELI | Papaveraceae | Dicot |
| celandine | Chelidonium majus | CHMA2 | Papaveraceae | Dicot |
| celandine | Chelidonium majus var. majus | CHMAM | Papaveraceae | Dicot |
| centaury | Centaurium | CENTA2 | Gentianaceae | Dicot |
| cereal rye | Secale cereale | SECE | Poaceae | Monocot |
| chaffweed | Anagallis minima | ANMI4 | Primulaceae | Dicot |
| chairmaker"s bulrush | Schoenoplectus americanus | SCAM6 | Cyperaceae | Monocot |
| Chamisso arnica | Arnica chamissonis | ARCH3 | Asteraceae | Dicot |
| Chamisso arnica | Arnica chamissonis ssp. chamissonis | ARCHC | Asteraceae | Dicot |
| Chamisso arnica | Arnica chamissonis ssp. chamissonis var. interior | ARCHI3 | 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. maguirei | ARCHM2 | Asteraceae | Dicot |
| chamisso sedge | Carex pachystachya | CAPA14 | Cyperaceae | Monocot |
| Chamisso"s cottongrass | Eriophorum chamissonis | ERCH7 | Cyperaceae | Monocot |
| chamomile | Anthemis | ANTHE | Asteraceae | Dicot |
| changing forget-me-not | Myosotis discolor | MYDI | Boraginaceae | Dicot |
| chaparral willowherb | Epilobium minutum | EPMI | Onagraceae | Dicot |
| charlock mustard | Sinapis arvensis | SIAR4 | Brassicaceae | Dicot |
| cheatgrass | Bromus tectorum | BRTE | Poaceae | Monocot |
| checkerbloom | Sidalcea | SIDAL | Malvaceae | Dicot |
| cheerful sunflower | Helianthus ×laetiflorus | HELA | Asteraceae | Dicot |
| cheeseweed mallow | Malva parviflora | MAPA5 | Malvaceae | Dicot |
| cherry plum | Prunus cerasifera | PRCE2 | Rosaceae | Dicot |
| chervil | Anthriscus | ANTHR | Apiaceae | 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 |
| chickensage | Sphaeromeria | SPHAE3 | Asteraceae | Dicot |
| chickpea milkvetch | Astragalus cicer | ASCI4 | Fabaceae | Dicot |
| chicory | Cichorium | CICHO | Asteraceae | Dicot |
| chicory | Cichorium intybus | CIIN | Asteraceae | Dicot |
| chokecherry | Prunus virginiana | PRVI | Rosaceae | Dicot |
| chondrilla | Chondrilla | CHOND | Asteraceae | Dicot |
| chorispora | Chorispora | CHORI | Brassicaceae | Dicot |
| cicada milkvetch | Astragalus chamaeleuce | ASCH4 | Fabaceae | Dicot |
| cicada milkvetch | Astragalus chamaeleuce var. chamaeleuce | ASCHC2 | Fabaceae | Dicot |
| cinquefoil | Potentilla | POTEN | Rosaceae | 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 |
| claspleaf twistedstalk | Streptopus amplexifolius var. amplexifolius | STAMA2 | Liliaceae | Monocot |
| cliff bittercress | Cardamine rupicola | CARU2 | Brassicaceae | Dicot |
| cliff fern | Woodsia | WOODS | Dryopteridaceae | Fern |
| cliffbrake | Pellaea | PELLA | Pteridaceae | Fern |
| 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 |
| closedhead sedge | Carex norvegica ssp. inferalpina | CANOI | Cyperaceae | Monocot |
| cloud sedge | Carex haydeniana | CAHA6 | Cyperaceae | Monocot |
| clover | Trifolium | TRIFO | Fabaceae | Dicot |
| clover dodder | Cuscuta epithymum | CUEP | Cuscutaceae | Dicot |
| club spikemoss | Selaginella selaginoides | SESE | Selaginellaceae | Lycopod |
| clubmoss | Lycopodiella | LYCOP6 | Lycopodiaceae | Lycopod |
| clubmoss | Lycopodium | LYCOP2 | Lycopodiaceae | Lycopod |
| clubmoss | Huperzia | HUPER | Lycopodiaceae | Lycopod |
| clustered broomrape | Orobanche fasciculata | ORFA | Orobanchaceae | Dicot |
| clustered field sedge | Carex praegracilis | CAPR5 | Cyperaceae | Monocot |
| clustered lady"s slipper | Cypripedium fasciculatum | CYFA | Orchidaceae | Monocot |
| clustered sawwort | Saussurea densa | SADE3 | Asteraceae | Dicot |
| clustered thistle | Cirsium brevistylum | CIBR2 | Asteraceae | Dicot |
| coastal sand sedge | Carex incurviformis | CAIN8 | Cyperaceae | Monocot |
| coastal sand sedge | Carex incurviformis var. danaensis | CAIND | Cyperaceae | Monocot |
| coastal sand sedge | Carex incurviformis var. incurviformis | CAINI2 | Cyperaceae | Monocot |
| cocklebur | Xanthium | XANTH2 | Asteraceae | Dicot |
| cockspur grass | Echinochloa | ECHIN4 | Poaceae | Monocot |
| coiled lousewort | Pedicularis contorta | PECO | Scrophulariaceae | Dicot |
| coiled lousewort | Pedicularis contorta var. contorta | PECOC2 | Scrophulariaceae | Dicot |
| coiled lousewort | Pedicularis contorta var. ctenophora | PECOC | Scrophulariaceae | Dicot |
| coiled lousewort | Pedicularis contorta var. rubicunda | PECOR | Scrophulariaceae | Dicot |
| Collins" rockcress | Arabis holboellii var. collinsii | ARHOC | Brassicaceae | Dicot |
| colonial bentgrass | Agrostis capillaris | AGCA5 | Poaceae | Monocot |
| Colorado blue columbine | Aquilegia coerulea | AQCO | Ranunculaceae | Dicot |
| Colorado blue columbine | Aquilegia coerulea var. coerulea | AQCOC | Ranunculaceae | Dicot |
| Colorado fescue | Festuca brachyphylla ssp. coloradensis | FEBRC | Poaceae | Monocot |
| Colorado rush | Juncus confusus | JUCO2 | Juncaceae | Monocot |
| Colorado wildrye | Leymus ambiguus | LEAM | Poaceae | Monocot |
| Columbia brome | Bromus vulgaris | BRVU | Poaceae | Monocot |
| Columbia lily | Lilium columbianum | LICO | Liliaceae | Monocot |
| Columbia needlegrass | Achnatherum nelsonii | ACNE9 | Poaceae | Monocot |
| Columbia needlegrass | Achnatherum nelsonii ssp. nelsonii | ACNEN2 | Poaceae | Monocot |
| Columbia ragwort | Senecio integerrimus var. exaltatus | SEINE | Asteraceae | Dicot |
| Columbia River wormwood | Artemisia lindleyana | ARLI2 | Asteraceae | Dicot |
| Columbian lewisia | Lewisia columbiana | LECO3 | Portulacaceae | Dicot |
| Columbian mock orange | Philadelphus trichothecus | PHTR3 | Hydrangeaceae | Dicot |
| Columbian monkshood | Aconitum columbianum | ACCO4 | Ranunculaceae | Dicot |
| Columbian monkshood | Aconitum columbianum ssp. columbianum | ACCOC3 | Ranunculaceae | Dicot |
| Columbian onion | Allium columbianum | ALCO2 | Liliaceae | Monocot |
| Columbian rockcress | Arabis sparsiflora var. columbiana | ARSPC2 | Brassicaceae | Dicot |
| Columbian sedge | Carex aperta | CAAP3 | Cyperaceae | Monocot |
| Columbian stitchwort | Minuartia austromontana | MIAU3 | Caryophyllaceae | Dicot |
| Columbian watermeal | Wolffia columbiana | WOCO | Lemnaceae | Monocot |
| columbine | Aquilegia | AQUIL | Ranunculaceae | Dicot |
| Columubia rush | Juncus nevadensis var. columbianus | JUNEC | Juncaceae | Monocot |
| comarum | Comarum | COMAR3 | Rosaceae | Dicot |
| combleaf cinquefoil | Potentilla pectinisecta | POPE23 | Rosaceae | Dicot |
| comfrey | Symphytum | SYMPH2 | Boraginaceae | Dicot |
| common alplily | Lloydia serotina | LLSE | Liliaceae | Monocot |
| common alplily | Lloydia serotina var. serotina | LLSES2 | Liliaceae | Monocot |
| common balm | Melissa officinalis | MEOF2 | Lamiaceae | Dicot |
| common barberry | Berberis vulgaris | BEVU | Berberidaceae | Dicot |
| common barley | Hordeum vulgare | HOVU | Poaceae | Monocot |
| common beargrass | Xerophyllum tenax | XETE | Liliaceae | Monocot |
| common beet | Beta vulgaris | BEVU2 | Chenopodiaceae | Dicot |
| common bladderwort | Utricularia macrorhiza | UTMA | Lentibulariaceae | Dicot |
| common bluecup | Githopsis specularioides | GISP3 | Campanulaceae | Dicot |
| common borage | Borago officinalis | BOOF | Boraginaceae | Dicot |
| common buckthorn | Rhamnus cathartica | RHCA3 | Rhamnaceae | Dicot |
| common bugloss | Anchusa officinalis | ANOF | Boraginaceae | Dicot |
| common chickweed | Stellaria media | STME2 | Caryophyllaceae | Dicot |
| common chickweed | Stellaria media ssp. media | STMEM | Caryophyllaceae | Dicot |
| common comfrey | Symphytum officinale | SYOF | Boraginaceae | Dicot |
| common corncockle | Agrostemma githago | AGGI | Caryophyllaceae | Dicot |
| common cowparsnip | Heracleum maximum | HEMA80 | Apiaceae | Dicot |
| common dandelion | Taraxacum officinale | TAOF | Asteraceae | Dicot |
| common dandelion | Taraxacum officinale ssp. ceratophorum | TAOFC | Asteraceae | Dicot |
| common dandelion | Taraxacum officinale ssp. officinale | TAOFO | Asteraceae | Dicot |
| common dogmustard | Erucastrum gallicum | ERGA | Brassicaceae | Dicot |
| common duckmeat | Spirodela polyrrhiza | SPPO | Lemnaceae | Monocot |
| common duckweed | Lemna minor | LEMI3 | Lemnaceae | Monocot |
| common evening primrose | Oenothera biennis | OEBI | Onagraceae | Dicot |
| common fiddleneck | Amsinckia menziesii var. intermedia | AMMEI2 | Boraginaceae | Dicot |
| common flax | Linum usitatissimum | LIUS | Linaceae | Dicot |
| common gypsyweed | Veronica officinalis | VEOF2 | Scrophulariaceae | Dicot |
| common gypsyweed | Veronica officinalis var. officinalis | VEOFO | Scrophulariaceae | Dicot |
| common hackberry | Celtis occidentalis | CEOC | Ulmaceae | Dicot |
| common hardgrass | Sclerochloa dura | SCDU2 | Poaceae | Monocot |
| common hop | Humulus lupulus | HULU | Cannabaceae | Dicot |
| common hop | Humulus lupulus var. lupuloides | HULUL | Cannabaceae | Dicot |
| common hop | Humulus lupulus var. neomexicanus | HULUN | Cannabaceae | Dicot |
| common juniper | Juniperus communis | JUCO6 | Cupressaceae | Gymnosperm |
| common juniper | Juniperus communis var. depressa | JUCOD | Cupressaceae | Gymnosperm |
| common ladyfern | Athyrium filix-femina | ATFI | Dryopteridaceae | Fern |
| common mallow | Malva neglecta | MANE | Malvaceae | Dicot |
| common mare"s-tail | Hippuris vulgaris | HIVU2 | Hippuridaceae | Dicot |
| common marsh bedstraw | Galium palustre | GAPA3 | Rubiaceae | Dicot |
| common milkweed | Asclepias syriaca | ASSY | Asclepiadaceae | Dicot |
| common moonwort | Botrychium lunaria | BOLU | Ophioglossaceae | Fern |
| common motherwort | Leonurus cardiaca | LECA2 | Lamiaceae | Dicot |
| common motherwort | Leonurus cardiaca ssp. cardiaca | LECAC7 | Lamiaceae | Dicot |
| common mouse-ear chickweed | Cerastium fontanum | CEFO2 | Caryophyllaceae | Dicot |
| common mullein | Verbascum thapsus | VETH | Scrophulariaceae | Dicot |
| common nipplewort | Lapsana communis | LACO3 | Asteraceae | Dicot |
| common oat | Avena sativa | AVSA | Poaceae | Monocot |
| common pear | Pyrus communis | PYCO | Rosaceae | Dicot |
| common pepperweed | Lepidium densiflorum | LEDE | Brassicaceae | Dicot |
| common periwinkle | Vinca minor | VIMI2 | Apocynaceae | Dicot |
| common plantain | Plantago major | PLMA2 | Plantaginaceae | Dicot |
| common reed | Phragmites australis | PHAU7 | Poaceae | Monocot |
| common rivergrass | Scolochloa festucacea | SCFE | Poaceae | Monocot |
| common rush | Juncus effusus | JUEF | Juncaceae | Monocot |
| common rush | Juncus effusus var. conglomeratus | JUEFC2 | Juncaceae | Monocot |
| common salttree | Halimodendron halodendron | HAHA8 | Fabaceae | Dicot |
| common sandweed | Athysanus pusillus | ATPU | Brassicaceae | Dicot |
| common selfheal | Prunella vulgaris | PRVU | Lamiaceae | Dicot |
| common sheep sorrel | Rumex acetosella | RUAC3 | Polygonaceae | Dicot |
| common sneezeweed | Helenium autumnale | HEAU | Asteraceae | Dicot |
| common snowberry | Symphoricarpos albus | SYAL | Caprifoliaceae | Dicot |
| common snowberry | Symphoricarpos albus var. albus | SYALA | Caprifoliaceae | Dicot |
| common snowberry | Symphoricarpos albus var. laevigatus | SYALL | Caprifoliaceae | Dicot |
| common sowthistle | Sonchus oleraceus | SOOL | Asteraceae | Dicot |
| common spikerush | Eleocharis palustris | ELPA3 | Cyperaceae | Monocot |
| common spikerush | Eleocharis palustris var. palustris | ELPAP | Cyperaceae | Monocot |
| common St. Johnswort | Hypericum perforatum | HYPE | Clusiaceae | Dicot |
| common starlily | Leucocrinum montanum | LEMO4 | Liliaceae | Monocot |
| common sunflower | Helianthus annuus | HEAN3 | Asteraceae | Dicot |
| common tansy | Tanacetum vulgare | TAVU | Asteraceae | Dicot |
| common threesquare | Schoenoplectus pungens | SCPU10 | Cyperaceae | Monocot |
| common threesquare | Schoenoplectus pungens var. longispicatus | SCPUL4 | Cyperaceae | Monocot |
| common threesquare | Schoenoplectus pungens var. pungens | SCPUP5 | Cyperaceae | Monocot |
| common Townsend daisy | Townsendia leptotes | TOLE | Asteraceae | Dicot |
| common twinpod | Physaria didymocarpa | PHDI6 | Brassicaceae | Dicot |
| common twinpod | Physaria didymocarpa var. didymocarpa | PHDID | Brassicaceae | Dicot |
| common twinpod | Physaria didymocarpa var. lanata | PHDIL | Brassicaceae | Dicot |
| common velvetgrass | Holcus lanatus | HOLA | Poaceae | Monocot |
| common viper"s bugloss | Echium vulgare | ECVU | Boraginaceae | Dicot |
| common wheat | Triticum aestivum | TRAE | Poaceae | Monocot |
| common woodrush | Luzula multiflora | LUMU2 | Juncaceae | Monocot |
| common woodrush | Luzula multiflora ssp. frigida | LUMUF | Juncaceae | Monocot |
| common woodrush | Luzula multiflora ssp. multiflora | LUMUM | Juncaceae | Monocot |
| common woodrush | Luzula multiflora ssp. multiflora var. multiflora | LUMUM2 | Juncaceae | Monocot |
| common woolly sunflower | Eriophyllum lanatum | ERLA6 | Asteraceae | Dicot |
| common woolly sunflower | Eriophyllum lanatum var. integrifolium | ERLAI | Asteraceae | Dicot |
| common woolly sunflower | Eriophyllum lanatum var. lanatum | ERLAL3 | Asteraceae | Dicot |
| common wormwood | Artemisia vulgaris | ARVU | Asteraceae | Dicot |
| common yampah | Perideridia gairdneri ssp. borealis | PEGAB | Apiaceae | Dicot |
| common yarrow | Achillea millefolium | ACMI2 | Asteraceae | Dicot |
| common yarrow | Achillea millefolium var. alpicola | ACMIA | Asteraceae | Dicot |
| common yellow oxalis | Oxalis stricta | OXST | Oxalidaceae | Dicot |
| composite dropseed | Sporobolus compositus | SPCO16 | Poaceae | Monocot |
| composite dropseed | Sporobolus compositus var. compositus | SPCOC2 | Poaceae | Monocot |
| coneflower | Rudbeckia | RUDBE | Asteraceae | Dicot |
| conimitella | Conimitella | CONIM | Saxifragaceae | Dicot |
| contracted ricegrass | Achnatherum contractum | ACCO22 | Poaceae | Monocot |
| convallaria | Convallaria | CONVA | Liliaceae | Monocot |
| coolwort | Sullivantia | SULLI | Saxifragaceae | Dicot |
| coon"s tail | Ceratophyllum demersum | CEDE4 | Ceratophyllaceae | Dicot |
| coralroot | Corallorhiza | CORAL5 | Orchidaceae | Monocot |
| cordgrass | Spartina | SPART | Poaceae | Monocot |
| cordroot beardtongue | Penstemon montanus | PEMO4 | Scrophulariaceae | Dicot |
| cordroot beardtongue | Penstemon montanus var. montanus | PEMOM2 | Scrophulariaceae | Dicot |
| coriander | Coriandrum | CORIA | Apiaceae | Dicot |
| coriander | Coriandrum sativum | COSA | Apiaceae | Dicot |
| corn | Zea | ZEA | Poaceae | Monocot |
| corn | Zea mays | ZEMA | Poaceae | Monocot |
| corn | Zea mays ssp. mays | ZEMAM2 | Poaceae | Monocot |
| corn brome | Bromus squarrosus | BRSQ2 | Poaceae | Monocot |
| corn buttercup | Ranunculus arvensis | RAAR3 | Ranunculaceae | Dicot |
| corn chamomile | Anthemis arvensis | ANAR6 | Asteraceae | Dicot |
| corn gromwell | Buglossoides arvensis | BUAR3 | Boraginaceae | Dicot |
| corn poppy | Papaver rhoeas | PARH2 | Papaveraceae | Dicot |
| corn speedwell | Veronica arvensis | VEAR | Scrophulariaceae | Dicot |
| corn spurry | Spergula arvensis | SPAR | Caryophyllaceae | Dicot |
| corncockle | Agrostemma | AGROS | Caryophyllaceae | Dicot |
| cornsalad | Valerianella | VALER2 | Valerianaceae | Dicot |
| cosmopolitan bulrush | Schoenoplectus maritimus | SCMA8 | Cyperaceae | Monocot |
| costmary | Tanacetum balsamita | TABA | Asteraceae | Dicot |
| cotoneaster | Cotoneaster | COTON | Rosaceae | Dicot |
| cottonbatting plant | Pseudognaphalium stramineum | PSST7 | Asteraceae | Dicot |
| cottongrass | Eriophorum | ERIOP | Cyperaceae | Monocot |
| cottonrose | Logfia | LOGFI2 | Asteraceae | Dicot |
| cottonthistle | Onopordum | ONOPO | Asteraceae | Dicot |
| cottonwood | Populus | POPUL | Salicaceae | Dicot |
| country Indian paintbrush | Castilleja flava var. rustica | CAFLR | Scrophulariaceae | Dicot |
| cous biscuitroot | Lomatium cous | LOCO4 | Apiaceae | Dicot |
| Coville"s Indian paintbrush | Castilleja covilleana | CACO36 | Scrophulariaceae | Dicot |
| Coville"s rush | Juncus covillei | JUCO5 | Juncaceae | Monocot |
| Coville"s rush | Juncus covillei var. covillei | JUCOC | Juncaceae | Monocot |
| Coville"s rush | Juncus covillei var. obtusatus | JUCOO | Juncaceae | Monocot |
| cow soapwort | Vaccaria hispanica | VAHI2 | Caryophyllaceae | Dicot |
| cowparsnip | Heracleum | HERAC | Apiaceae | Dicot |
| cows clover | Trifolium wormskioldii | TRWO | Fabaceae | Dicot |
| cowwheat | Melampyrum | MELAM2 | Scrophulariaceae | Dicot |
| coyote tobacco | Nicotiana attenuata | NIAT | Solanaceae | Dicot |
| crabgrass | Digitaria | DIGIT2 | Poaceae | Monocot |
| crack willow | Salix fragilis | SAFR | Salicaceae | Dicot |
| cracked lichen | Acarospora | ACARO2 | Acarosporaceae | Lichen |
| Crandall"s saxifrage | Saxifraga flagellaris ssp. crandallii | SAFLC | Saxifragaceae | Dicot |
| Crawe"s sedge | Carex crawei | CACR3 | Cyperaceae | Monocot |
| Crawford"s sedge | Carex crawfordii | CACR4 | Cyperaceae | Monocot |
| cream cinquefoil | Potentilla arguta ssp. convallaria | POARC | Rosaceae | Dicot |
| cream milkvetch | Astragalus racemosus | ASRA2 | Fabaceae | Dicot |
| cream milkvetch | Astragalus racemosus var. longisetus | ASRAL | Fabaceae | Dicot |
| cream milkvetch | Astragalus racemosus var. racemosus | ASRAR2 | Fabaceae | Dicot |
| cream pea | Lathyrus ochroleucus | LAOC2 | Fabaceae | Dicot |
| creamflower rockcress | Arabis hirsuta var. pycnocarpa | ARHIP | Brassicaceae | Dicot |
| creeper | Parthenocissus | PARTH3 | Vitaceae | Dicot |
| creeping barberry | Mahonia repens | MARE11 | Berberidaceae | Dicot |
| creeping bentgrass | Agrostis stolonifera | AGST2 | Poaceae | Monocot |
| creeping buttercup | Ranunculus repens | RARE3 | Ranunculaceae | Dicot |
| creeping juniper | Juniperus horizontalis | JUHO2 | Cupressaceae | Gymnosperm |
| creeping meadow foxtail | Alopecurus arundinaceus | ALAR | Poaceae | Monocot |
| creeping nailwort | Paronychia sessiliflora | PASE | Caryophyllaceae | Dicot |
| creeping sedge | Carex chordorrhiza | CACH5 | Cyperaceae | Monocot |
| creeping sibbaldia | Sibbaldia procumbens | SIPR | Rosaceae | Dicot |
| creeping thyme | Thymus praecox ssp. arcticus | THPRA | Lamiaceae | Dicot |
| creeping woodsorrel | Oxalis corniculata | OXCO | Oxalidaceae | Dicot |
| creeping yellowcress | Rorippa sylvestris | ROSY | Brassicaceae | Dicot |
| creepingroot violet | Viola canadensis var. rugulosa | VICAR | Violaceae | Dicot |
| crested dogstail grass | Cynosurus cristatus | CYCR | Poaceae | Monocot |
| crested pricklypoppy | Argemone polyanthemos | ARPO2 | Papaveraceae | Dicot |
| crested wheatgrass | Agropyron cristatum | AGCR | Poaceae | Monocot |
| crested wheatgrass | Agropyron cristatum ssp. pectinatum | AGCRP8 | Poaceae | Monocot |
| crested woodfern | Dryopteris cristata | DRCR4 | Dryopteridaceae | Fern |
| crimson clover | Trifolium incarnatum | TRIN3 | Fabaceae | Dicot |
| Cross Mountain rockcress | Arabis williamsii var. saximontana | ARWIS | Brassicaceae | Dicot |
| crossflower | Chorispora tenella | CHTE2 | Brassicaceae | Dicot |
| crownbeard | Verbesina | VERBE2 | Asteraceae | Dicot |
| crowngrass | Paspalum | PASPA2 | Poaceae | Monocot |
| crownvetch | Securigera | SECUR3 | Fabaceae | Dicot |
| crownvetch | Securigera varia | SEVA4 | Fabaceae | Dicot |
| cryptantha | Cryptantha | CRYPT | Boraginaceae | Dicot |
| Cuddy Mountain onion | Allium fibrillum | ALFI | Liliaceae | Monocot |
| cudweed | Gnaphalium | GNAPH | Asteraceae | Dicot |
| cudweed | Pseudognaphalium | PSEUD43 | Asteraceae | Dicot |
| cultivated currant | Ribes rubrum | RIRU80 | Grossulariaceae | Dicot |