List of Washington Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| Aaron"s beard | Hypericum calycinum | HYCA10 | Clusiaceae | Dicot |
| absinthium | Artemisia absinthium | ARAB3 | Asteraceae | Dicot |
| achlys | Achlys | ACHLY | Berberidaceae | Dicot |
| acinos | Acinos | ACINO | Lamiaceae | Dicot |
| acuba | Aucuba | AUCUB | Cornaceae | Dicot |
| acute Indian paintbrush | Castilleja hispida ssp. acuta | CAHIA2 | Scrophulariaceae | Dicot |
| adderstongue | Ophioglossum | OPHIO | Ophioglossaceae | Fern |
| Aegean wallflower | Erysimum cheiri | ERCH10 | Brassicaceae | Dicot |
| African mustard | Malcolmia africana | MAAF | Brassicaceae | Dicot |
| agoseris | Agoseris | AGOSE | Asteraceae | Dicot |
| agrimony | Agrimonia | AGRIM | Rosaceae | Dicot |
| agropogon | ×Agropogon | AGROP3 | Poaceae | Monocot |
| ailanthus | Ailanthus | AILAN | Simaroubaceae | Dicot |
| Alaska bellheather | Harrimanella stelleriana | HAST3 | Ericaceae | Dicot |
| Alaska blue-eyed grass | Sisyrinchium littorale | SILI4 | Iridaceae | Monocot |
| Alaska blueberry | Vaccinium alaskaense | VAAL3 | Ericaceae | Dicot |
| Alaska bluegrass | Poa paucispicula | POPA26 | Poaceae | Monocot |
| Alaska brome | Bromus sitchensis | BRSI | Poaceae | Monocot |
| Alaska cedar | Callitropsis nootkatensis | CANO9 | Cupressaceae | Gymnosperm |
| Alaska curved woodrush | Luzula arcuata ssp. unalaschcensis | LUARU | Juncaceae | Monocot |
| Alaska draba | Draba stenoloba | DRST2 | Brassicaceae | Dicot |
| Alaska draba | Draba stenoloba var. stenoloba | DRSTS | Brassicaceae | Dicot |
| Alaska oniongrass | Melica subulata | MESU | Poaceae | Monocot |
| Alaska oniongrass | Melica subulata var. subulata | MESUS | Poaceae | Monocot |
| Alaskan scouringrush | Equisetum variegatum var. alaskanum | EQVAA | Equisetaceae | Horsetail |
| Alaskan wheatgrass | Elymus alaskanus | ELAL5 | Poaceae | Monocot |
| Alaskan wheatgrass | Elymus alaskanus ssp. latiglumis | ELALL | Poaceae | Monocot |
| Alberta saxifrage | Saxifraga occidentalis | SAOC4 | Saxifragaceae | Dicot |
| alder | Alnus | ALNUS | Betulaceae | Dicot |
| alderleaf buckthorn | Rhamnus alnifolia | RHAL | Rhamnaceae | Dicot |
| Aleutian brome | Bromus aleutensis | BRAL6 | Poaceae | Monocot |
| Aleutian maidenhair | Adiantum aleuticum | ADAL | Pteridaceae | Fern |
| Aleutian violet | Viola langsdorffii | VILA6 | Violaceae | Dicot |
| 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 |
| Alice Eastwood"s fleabane | Erigeron aliceae | ERAL3 | Asteraceae | 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 mallow | Malvella leprosa | MALE3 | Malvaceae | Dicot |
| alkali pepperweed | Lepidium dictyotum | LEDI2 | Brassicaceae | Dicot |
| alkali pepperweed | Lepidium dictyotum var. dictyotum | LEDID | Brassicaceae | Dicot |
| alkali pepperwort | Lepidium dictyotum var. acutidens | LEDIA | Brassicaceae | Dicot |
| alkali sacaton | Sporobolus airoides | SPAI | Poaceae | Monocot |
| alkali sandspurry | Spergularia diandra | SPDI | Caryophyllaceae | Dicot |
| 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 |
| Allegheny serviceberry | Amelanchier laevis | AMLA | Rosaceae | Dicot |
| alliaria | Alliaria | ALLIA | Brassicaceae | Dicot |
| alpine alumroot | Heuchera cylindrica var. alpina | HECYA | Saxifragaceae | Dicot |
| alpine azalea | Loiseleuria procumbens | LOPR | Ericaceae | Dicot |
| alpine bentgrass | Agrostis humilis | AGHU | Poaceae | Monocot |
| alpine bistort | Polygonum viviparum | POVI3 | Polygonaceae | Dicot |
| alpine bittercress | Cardamine bellidifolia | CABE | Brassicaceae | Dicot |
| alpine bittercress | Cardamine bellidifolia var. bellidifolia | CABEB | Brassicaceae | Dicot |
| alpine bittercress | Cardamine bellidifolia var. pachyphylla | CABEP | Brassicaceae | Dicot |
| alpine bluegrass | Poa alpina | POAL2 | Poaceae | Monocot |
| alpine clubmoss | Lycopodium alpinum | LYAL3 | Lycopodiaceae | Lycopod |
| alpine collomia | Collomia debilis | CODE | Polemoniaceae | Dicot |
| alpine collomia | Collomia debilis var. debilis | CODED | Polemoniaceae | Dicot |
| alpine collomia | Collomia debilis var. trifida | CODET | Polemoniaceae | Dicot |
| alpine false candytuft | Smelowskia ovalis | SMOV | Brassicaceae | Dicot |
| alpine false candytuft | Smelowskia ovalis var. ovalis | SMOVO | Brassicaceae | 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 | ERFL4 | Polygonaceae | Dicot |
| alpine groundsel | Packera pauciflora | PAPA19 | Asteraceae | Dicot |
| alpine heuchera | Heuchera glabra | HEGL5 | Saxifragaceae | Dicot |
| alpine ladyfern | Athyrium americanum | ATAM | Dryopteridaceae | Fern |
| alpine lake false dandelion | Nothocalais alpestris | NOAL2 | Asteraceae | Dicot |
| 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 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 pondweed | Potamogeton alpinus | POAL8 | Potamogetonaceae | Monocot |
| 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. bellidifolia | CLMEB | Portulacaceae | Dicot |
| alpine springbeauty | Claytonia megarhiza var. megarhiza | CLMEM | Portulacaceae | Dicot |
| alpine springbeauty | Claytonia megarhiza var. nivalis | CLMEN | Portulacaceae | Dicot |
| alpine timothy | Phleum alpinum | PHAL2 | Poaceae | Monocot |
| alpine willow | Salix petrophila | SAPE18 | Salicaceae | Dicot |
| alpine yellow fleabane | Erigeron aureus | ERAU | Asteraceae | Dicot |
| alpine yellow fleabane | Erigeron aureus var. aureus | ERAUA3 | Asteraceae | Dicot |
| alpinegold | Hulsea | HULSE | Asteraceae | Dicot |
| alplily | Lloydia | LLOYD | Liliaceae | Monocot |
| alsike clover | Trifolium hybridum | TRHY | Fabaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| American alpine speedwell | Veronica wormskjoldii | VEWO2 | Scrophulariaceae | Dicot |
| American alpine speedwell | Veronica wormskjoldii var. wormskjoldii | VEWOW | Scrophulariaceae | Dicot |
| American beachgrass | Ammophila breviligulata | AMBR | Poaceae | Monocot |
| 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 black nightshade | Solanum americanum | SOAM | Solanaceae | Dicot |
| American bugseed | Corispermum americanum | COAM8 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. americanum | COAMA2 | Chenopodiaceae | Dicot |
| American burnweed | Erechtites hieraciifolia | ERHI2 | Asteraceae | Dicot |
| American burnweed | Erechtites hieraciifolia var. hieraciifolia | ERHIH | Asteraceae | 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 dunegrass | Leymus mollis | LEMO8 | Poaceae | Monocot |
| American dunegrass | Leymus mollis ssp. mollis | LEMOM2 | Poaceae | Monocot |
| American dwarf mistletoe | Arceuthobium americanum | ARAM | Viscaceae | Dicot |
| American eelgrass | Vallisneria americana | VAAM3 | Hydrocharitaceae | Monocot |
| 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 pillwort | Pilularia americana | PIAM | Marsileaceae | Fern |
| American plum | Prunus americana | PRAM | Rosaceae | Dicot |
| American pokeweed | Phytolacca americana | PHAM4 | Phytolaccaceae | Dicot |
| American pokeweed | Phytolacca americana var. americana | PHAMA3 | Phytolaccaceae | 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 searocket | Cakile edentula | CAED | Brassicaceae | Dicot |
| American searocket | Cakile edentula ssp. edentula | CAEDE | Brassicaceae | Dicot |
| American searocket | Cakile edentula ssp. edentula var. edentula | CAEDE2 | Brassicaceae | Dicot |
| American silvertop | Glehnia littoralis | GLLI | Apiaceae | Dicot |
| American silvertop | Glehnia littoralis ssp. leiocarpa | GLLIL | Apiaceae | Dicot |
| American skunkcabbage | Lysichiton americanus | LYAM3 | Araceae | Monocot |
| American sloughgrass | Beckmannia syzigachne | BESY | Poaceae | Monocot |
| American speedwell | Veronica americana | VEAM2 | Scrophulariaceae | Dicot |
| American stickseed | Hackelia deflexa var. americana | HADEA | Boraginaceae | 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 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 wild carrot | Daucus pusillus | DAPU3 | Apiaceae | Dicot |
| American woollyfruit sedge | Carex lasiocarpa var. americana | CALAA | Cyperaceae | Monocot |
| American yellowrocket | Barbarea orthoceras | BAOR | Brassicaceae | Dicot |
| Ames" milkvetch | Astragalus pulsiferae | ASPU7 | Fabaceae | Dicot |
| Ames" milkvetch | Astragalus pulsiferae var. pulsiferae | ASPUP5 | Fabaceae | Dicot |
| amphibious lupine | Lupinus amphibius | LUAM2 | Fabaceae | Dicot |
| analogue sedge | Carex simulata | CASI2 | Cyperaceae | Monocot |
| Andean watermilfoil | Myriophyllum quitense | MYQU | Haloragaceae | Dicot |
| Anderson"s hollyfern | Polystichum andersonii | POAN2 | Dryopteridaceae | Fern |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| angelica | Angelica | ANGEL | Apiaceae | Dicot |
| angleleaf miterwort | Mitella diversifolia | MIDI4 | Saxifragaceae | 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 pearlwort | Sagina apetala | SAAP | Caryophyllaceae | Dicot |
| 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 sandwort | Minuartia pusilla | MIPU7 | Caryophyllaceae | Dicot |
| annual sandwort | Minuartia pusilla var. pusilla | MIPUP | Caryophyllaceae | Dicot |
| annual silver hairgrass | Aira elegans | AIEL4 | Poaceae | Monocot |
| annual vernalgrass | Anthoxanthum aristatum | ANAR7 | Poaceae | Monocot |
| annual water minerslettuce | Montia fontana | MOFO | Portulacaceae | Dicot |
| annual wheatgrass | Eremopyrum triticeum | ERTR13 | Poaceae | Monocot |
| annual yellow sweetclover | Melilotus indicus | MEIN2 | Fabaceae | Dicot |
| antelope bitterbrush | Purshia tridentata | PUTR2 | Rosaceae | Dicot |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apple mint | Mentha suaveolens | MESU5 | Lamiaceae | Dicot |
| apple of Peru | Nicandra physalodes | NIPH | Solanaceae | Dicot |
| arborvitae | Thuja | THUJA | Cupressaceae | Gymnosperm |
| 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 bentgrass | Agrostis aequivalvis | AGAE | Poaceae | Monocot |
| arctic bluegrass | Poa arctica | POAR2 | Poaceae | Monocot |
| arctic bluegrass | Poa arctica ssp. arctica | POARA2 | Poaceae | Monocot |
| arctic cinquefoil | Potentilla nana | PONA6 | Rosaceae | Dicot |
| arctic lupine | Lupinus arcticus | LUAR2 | Fabaceae | 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 starflower | Trientalis europaea | TREU | Primulaceae | Dicot |
| arctic starflower | Trientalis europaea ssp. arctica | TREUA | Primulaceae | Dicot |
| arctic sweet coltsfoot | Petasites frigidus | PEFR5 | Asteraceae | Dicot |
| arctic sweet coltsfoot | Petasites frigidus var. frigidus | PEFRF | Asteraceae | Dicot |
| arctic sweet coltsfoot | Petasites frigidus var. palmatus | PEFRP | Asteraceae | Dicot |
| arctic sweet coltsfoot | Petasites frigidus var. vitifolius | PEFRV | Asteraceae | Dicot |
| arctic willow | Salix arctica | SAAR27 | Salicaceae | Dicot |
| armeria | Armeria | ARMER | Plumbaginaceae | Dicot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| arnica | Arnica | ARNIC | 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 buckwheat | Eriogonum compositum | ERCO12 | Polygonaceae | Dicot |
| arrowleaf buckwheat | Eriogonum compositum var. compositum | ERCOC8 | Polygonaceae | Dicot |
| arrowleaf buckwheat | Eriogonum compositum var. lancifolium | ERCOL | Polygonaceae | Dicot |
| arrowleaf buckwheat | Eriogonum compositum var. leianthum | ERCOL2 | Polygonaceae | Dicot |
| arrowleaf clover | Trifolium vesiculosum | TRVE | Fabaceae | Dicot |
| arrowleaf ragwort | Senecio triangularis | SETR | Asteraceae | Dicot |
| arrowleaf sweet coltsfoot | Petasites frigidus var. sagittatus | PEFRS5 | Asteraceae | Dicot |
| arroyo willow | Salix lasiolepis | SALA6 | Salicaceae | Dicot |
| arroyo willow | Salix lasiolepis var. lasiolepis | SALAL2 | Salicaceae | Dicot |
| arum | Arum | ARUM2 | Araceae | Monocot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| aruncus | Aruncus | ARUNC | Rosaceae | Dicot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| ashy cinquefoil | Potentilla inclinata | POIN10 | Rosaceae | Dicot |
| Asian forget-me-not | Myosotis asiatica | MYAS2 | Boraginaceae | Dicot |
| Asiatic dayflower | Commelina communis | COCO3 | Commelinaceae | Monocot |
| 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 |
| aster | Symphyotrichum ×amethystinum | SYAM3 | Asteraceae | Dicot |
| aster | Symphyotrichum ×columbianum | SYCO2 | Asteraceae | Dicot |
| asthmaweed | Conyza bonariensis | COBO | Asteraceae | Dicot |
| Atkinson"s tickseed | Coreopsis tinctoria var. atkinsoniana | COTIA | Asteraceae | Dicot |
| Atlantic Ivy | Hedera hibernica | HEHI12 | Araliaceae | Dicot |
| attenuate Indian paintbrush | Castilleja attenuata | CAAT25 | Scrophulariaceae | Dicot |
| aurinia | Aurinia | AURIN | Brassicaceae | Dicot |
| Austin knotweed | Polygonum douglasii ssp. austiniae | PODOA2 | Polygonaceae | Dicot |
| Austrian chamomile | Anthemis austriaca | ANAU3 | Asteraceae | 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 |
| avens | Geum | GEUM | Rosaceae | Dicot |
| awl-leaf arrowhead | Sagittaria subulata | SASU | Alismataceae | Monocot |
| awl-leaf lilaea | Lilaea scilloides | LISC4 | Juncaginaceae | Monocot |
| awlfruit sedge | Carex stipata | CAST5 | Cyperaceae | Monocot |
| awlwort | Subularia | SUBUL | Brassicaceae | Dicot |
| awned halfchaff sedge | Lipocarpha aristulata | LIAR6 | Cyperaceae | Monocot |
| Azores forget-me-not | Myosotis azorica | MYAZ | Boraginaceae | Dicot |
| baby blue eyes | Nemophila | NEMOP | Hydrophyllaceae | Dicot |
| baby"s breath | Gypsophila paniculata | GYPA | Caryophyllaceae | Dicot |
| baby"s-breath | Gypsophila | GYPSO | Caryophyllaceae | Dicot |
| Back"s sedge | Carex backii | CABA3 | Cyperaceae | Monocot |
| Bailey"s buckwheat | Eriogonum baileyi | ERBA7 | Polygonaceae | Dicot |
| Bailey"s buckwheat | Eriogonum baileyi var. baileyi | ERBAB | Polygonaceae | Dicot |
| Baker"s hawksbeard | Crepis bakeri | CRBA2 | Asteraceae | Dicot |
| Baker"s hawksbeard | Crepis bakeri ssp. bakeri | CRBAB | Asteraceae | Dicot |
| Baker"s violet | Viola bakeri | VIBA2 | Violaceae | Dicot |
| Baker"s wheatgrass | Elymus bakeri | ELBA3 | Poaceae | Monocot |
| bald brome | Bromus racemosus | BRRA2 | Poaceae | Monocot |
| Balfour"s touch-me-not | Impatiens balfourii | IMBA2 | Balsaminaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta | IPCO5 | Polemoniaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta ssp. congesta | IPCOC3 | Polemoniaceae | Dicot |
| ballhead sandwort | Arenaria congesta | ARCO5 | Caryophyllaceae | Dicot |
| ballhead sandwort | Arenaria congesta var. prolifera | ARCOP | 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 |
| ballmustard | Neslia paniculata | NEPA3 | Brassicaceae | Dicot |
| balloonpod milkvetch | Astragalus whitneyi | ASWH | Fabaceae | Dicot |
| balloonpod milkvetch | Astragalus whitneyi var. sonneanus | ASWHS2 | Fabaceae | Dicot |
| balm | Melissa | MELIS | Lamiaceae | Dicot |
| balsam groundsel | Packera paupercula | PAPA20 | Asteraceae | Dicot |
| balsam poplar | Populus balsamifera | POBA2 | Salicaceae | Dicot |
| balsamroot | Balsamorhiza | BALSA | Asteraceae | Dicot |
| balsamroot | Balsamorhiza ×bonseri | BABO | Asteraceae | Dicot |
| balsamroot | Balsamorhiza ×terebinthacea | BATE3 | Asteraceae | Dicot |
| balsamroot | Balsamorhiza ×tomentosa | BATO2 | Asteraceae | Dicot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| barberry | Berberis | BERBE | Berberidaceae | Dicot |
| barberry | Mahonia | MAHON | Berberidaceae | Dicot |
| Barclay"s willow | Salix barclayi | SABA3 | Salicaceae | Dicot |
| barestem biscuitroot | Lomatium nudicaule | LONU2 | Apiaceae | Dicot |
| barestem teesdalia | Teesdalia nudicaulis | TENU | Brassicaceae | Dicot |
| barley | Hordeum | HORDE | Poaceae | Monocot |
| barley | ×Elyhordeum | ELYHO | Poaceae | Monocot |
| barnyardgrass | Echinochloa crus-galli | ECCR | Poaceae | Monocot |
| Barrett"s beardtongue | Penstemon barrettiae | PEBA7 | Scrophulariaceae | Dicot |
| basalt desert buckwheat | Eriogonum codium | ERCO43 | Polygonaceae | Dicot |
| basalt fleabane | Erigeron basalticus | ERBA4 | Asteraceae | Dicot |
| basalt larkspur | Delphinium basalticum | DEBA9 | Ranunculaceae | Dicot |
| basalt milkvetch | Astragalus filipes | ASFI | Fabaceae | 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 |
| basket of gold | Aurinia saxatilis | AUSA | Brassicaceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bay forget-me-not | Myosotis laxa | MYLA | Boraginaceae | Dicot |
| bayberry | Morella | MOREL2 | Myricaceae | Dicot |
| beach knotweed | Polygonum paronychia | POPA7 | Polygonaceae | Dicot |
| beach pea | Lathyrus japonicus | LAJA | Fabaceae | Dicot |
| beach pea | Lathyrus japonicus var. maritimus | LAJAM | Fabaceae | Dicot |
| beach pine | Pinus contorta var. contorta | PICOC | Pinaceae | Gymnosperm |
| beach strawberry | Fragaria chiloensis | FRCH | Rosaceae | Dicot |
| beach strawberry | Fragaria chiloensis ssp. lucida | FRCHL | Rosaceae | Dicot |
| beachgrass | Ammophila | AMMOP | Poaceae | Monocot |
| 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 |
| beaksedge | Rhynchospora | RHYNC3 | Cyperaceae | Monocot |
| beancaper | Zygophyllum | ZYGOP | Zygophyllaceae | Dicot |
| bearbrush | Garrya fremontii | GAFR | Garryaceae | Dicot |
| beard lichen | Usnea | USNEA2 | Parmeliaceae | Lichen |
| bearded fescue | Festuca subulata | FESU | Poaceae | Monocot |
| bearded flatsedge | Cyperus squarrosus | CYSQ | Cyperaceae | Monocot |
| bearded melicgrass | Melica aristata | MEAR3 | Poaceae | Monocot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| bearded wheatgrass | Elymus caninus | ELCA11 | 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 |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| beargrass | Xerophyllum | XEROP | Liliaceae | Monocot |
| beautiful alumroot | Heuchera cylindrica var. glabella | HECYG | Saxifragaceae | Dicot |
| beautiful cinquefoil | Potentilla pulcherrima | POPU9 | Rosaceae | Dicot |
| beautiful sandwort | Minuartia rubella | MIRU3 | Caryophyllaceae | Dicot |
| beautiful spikerush | Eleocharis bella | ELBE | Cyperaceae | Monocot |
| 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 milkvetch | Astragalus beckwithii | ASBE3 | Fabaceae | Dicot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| bedstraw | Cruciata | CRUCI2 | Rubiaceae | Dicot |
| beebalm | Monarda | MONAR | Lamiaceae | Dicot |
| beeblossom | Gaura | GAURA | Onagraceae | Dicot |
| beechfern | Phegopteris | PHEGO | Thelypteridaceae | Fern |
| beefsteakplant | Perilla frutescens | PEFR4 | Lamiaceae | Dicot |
| beefsteakplant | Perilla frutescens var. frutescens | PEFRF2 | Lamiaceae | Dicot |
| beethistle | Eryngium articulatum | ERAR14 | Apiaceae | Dicot |
| beggarticks | Bidens | BIDEN | Asteraceae | Dicot |
| belladonna | Atropa | ATROP | Solanaceae | Dicot |
| belladonna | Atropa bella-donna | ATBE | Solanaceae | Dicot |
| Bellardi bog sedge | Kobresia myosuroides | KOMY | Cyperaceae | Monocot |
| bellflower | Campanula | CAMPA | Campanulaceae | Dicot |
| bellflower smartweed | Polygonum campanulatum | POCA20 | Polygonaceae | Dicot |
| bellis | Bellis | BELLI | Asteraceae | Dicot |
| bent milkvetch | Astragalus inflexus | ASIN5 | Fabaceae | 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 |
| Bering"s tufted hairgrass | Deschampsia beringensis | DEBE2 | Poaceae | Monocot |
| Bermudagrass | Cynodon | CYNOD | Poaceae | Monocot |
| Bermudagrass | Cynodon dactylon | CYDA | Poaceae | Monocot |
| 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 chickweed | Cerastium fontanum ssp. vulgare | CEFOV2 | Caryophyllaceae | Dicot |
| big deervetch | Lotus crassifolius | LOCR | Fabaceae | Dicot |
| big deervetch | Lotus crassifolius var. crassifolius | LOCRC | Fabaceae | Dicot |
| big devils beggartick | Bidens vulgata | BIVU | Asteraceae | Dicot |
| big sagebrush | Artemisia tridentata | ARTR2 | Asteraceae | Dicot |
| big sagebrush | Artemisia tridentata ssp. spiciformis | ARTRS2 | Asteraceae | Dicot |
| big squirreltail | Elymus multisetus | ELMU3 | Poaceae | Monocot |
| big trefoil | Lotus pedunculatus | LOPE80 | Fabaceae | Dicot |
| big western bittercress | Cardamine occidentalis | CAOC | Brassicaceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| bigflower agoseris | Agoseris grandiflora | AGGR | Asteraceae | Dicot |
| bigflower tellima | Tellima grandiflora | TEGR2 | Saxifragaceae | Dicot |
| bighead horkelia | Horkelia fusca ssp. capitata | HOFUC2 | Rosaceae | Dicot |
| bighead knapweed | Centaurea macrocephala | CEMA9 | Asteraceae | Dicot |
| bigleaf clover | Trifolium plumosum ssp. amplifolium | TRPLA | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus | LUPO2 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus | LUPOP2 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus var. pallidipes | LUPOP3 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus var. polyphyllus | LUPOP4 | Fabaceae | Dicot |
| bigleaf maple | Acer macrophyllum | ACMA3 | Aceraceae | Dicot |
| bigleaf periwinkle | Vinca major | VIMA | Apocynaceae | Dicot |
| bigleaf sedge | Carex amplifolia | CAAM10 | Cyperaceae | Monocot |
| bigseed biscuitroot | Lomatium macrocarpum | LOMA3 | Apiaceae | Dicot |
| bigtooth maple | Acer grandidentatum | ACGR3 | Aceraceae | Dicot |
| bigtooth maple | Acer grandidentatum var. grandidentatum | ACGRG | Aceraceae | Dicot |
| billion-dollar grass | Echinochloa frumentacea | ECFR | Poaceae | Monocot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| Bingen lupine | Lupinus bingenensis | LUBI3 | Fabaceae | Dicot |
| Bingen lupine | Lupinus bingenensis var. bingenensis | LUBIB2 | Fabaceae | Dicot |
| Bingen lupine | Lupinus bingenensis var. dubius | LUBID | Fabaceae | Dicot |
| Bingen lupine | Lupinus bingenensis var. subsaccatus | LUBIS | Fabaceae | 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 |
| birdeye pearlwort | Sagina procumbens | SAPR | Caryophyllaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | 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 cherry | Prunus emarginata var. mollis | PREMM | 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 |
| 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 bindweed | Polygonum convolvulus var. subulatum | POCOS | Polygonaceae | Dicot |
| black cherry | Prunus serotina | PRSE2 | Rosaceae | Dicot |
| black chokecherry | Prunus virginiana var. melanocarpa | PRVIM | Rosaceae | Dicot |
| black cottonwood | Populus balsamifera ssp. trichocarpa | POBAT | Salicaceae | Dicot |
| black crowberry | Empetrum nigrum | EMNI | Empetraceae | Dicot |
| black crowberry | Empetrum nigrum ssp. hermaphroditum | EMNIH | Empetraceae | Dicot |
| black crowberry | Empetrum nigrum ssp. nigrum | EMNIN | Empetraceae | Dicot |
| black elderberry | Sambucus nigra | SANI4 | Caprifoliaceae | Dicot |
| black garlic | Allium nigrum | ALNI | Liliaceae | Monocot |
| black hawthorn | Crataegus douglasii | CRDO2 | Rosaceae | Dicot |
| black henbane | Hyoscyamus niger | HYNI | Solanaceae | Dicot |
| black horehound | Ballota nigra | BANI | Lamiaceae | Dicot |
| black horehound | Ballota nigra var. foetida | BANIF2 | Lamiaceae | Dicot |
| black locust | Robinia pseudoacacia | ROPS | Fabaceae | Dicot |
| black medick | Medicago lupulina | MELU | Fabaceae | Dicot |
| black mustard | Brassica nigra | BRNI | Brassicaceae | Dicot |
| black nightshade | Solanum nigrum | SONI | Solanaceae | Dicot |
| black vetch | Vicia nigricans | VINI81 | Fabaceae | Dicot |
| 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 River evening primrose | Camissonia andina | CAAN14 | Onagraceae | Dicot |
| blackgirdle bulrush | Scirpus atrocinctus | SCAT4 | Cyperaceae | Monocot |
| blackthorn | Prunus spinosa | PRSP | Rosaceae | 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 |
| blazingstar | Mentzelia | MENTZ | Loasaceae | Dicot |
| bleeding heart | Dicentra | DICEN | Fumariaceae | Dicot |
| blepharipappus | Blepharipappus | BLEPH2 | Asteraceae | Dicot |
| blessed milkthistle | Silybum marianum | SIMA3 | Asteraceae | Dicot |
| blessed thistle | Cnicus benedictus | CNBE | Asteraceae | Dicot |
| blindeyes | Papaver dubium | PADU | Papaveraceae | Dicot |
| blister sedge | Carex vesicaria | CAVE6 | Cyperaceae | Monocot |
| blisterwort | Ranunculus recurvatus | RARE2 | Ranunculaceae | Dicot |
| blisterwort | Ranunculus recurvatus var. recurvatus | RARER2 | Ranunculaceae | Dicot |
| blite goosefoot | Chenopodium capitatum | CHCA4 | Chenopodiaceae | Dicot |
| blooddrops | Adonis annua | ADAN | Ranunculaceae | Dicot |
| bloodtwig dogwood | Cornus sanguinea | COSA81 | Cornaceae | Dicot |
| Bloomer"s aster | Symphyotrichum campestre var. bloomeri | SYCAB | Asteraceae | Dicot |
| blue elderberry | Sambucus nigra ssp. cerulea | SANIC5 | Caprifoliaceae | Dicot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue fieldmadder | Sherardia arvensis | SHAR2 | Rubiaceae | Dicot |
| blue giant hyssop | Agastache foeniculum | AGFO | Lamiaceae | Dicot |
| blue lettuce | Lactuca tatarica | LATA | Asteraceae | Dicot |
| blue lettuce | Lactuca tatarica var. pulchella | LATAP | Asteraceae | Dicot |
| Blue Mountain beardtongue | Penstemon pennellianus | PEPE11 | Scrophulariaceae | 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. anserinum | ERSTA3 | Polygonaceae | Dicot |
| Blue Mountain buckwheat | Eriogonum strictum ssp. proliferum var. glabrum | ERSTG2 | Polygonaceae | Dicot |
| Blue Mountain buckwheat | Eriogonum strictum ssp. proliferum var. proliferum | ERSTP3 | Polygonaceae | Dicot |
| Blue Mountain buckwheat | Eriogonum strictum ssp. strictum | ERSTS3 | Polygonaceae | Dicot |
| Blue Mountain milkvetch | Astragalus reventus | ASRE5 | Fabaceae | Dicot |
| Blue Mountain onion | Allium dictuon | ALDI3 | Liliaceae | Monocot |
| Blue Mountain prairie clover | Dalea ornata | DAOR2 | Fabaceae | Dicot |
| blue nodding locoweed | Oxytropis deflexa var. sericea | OXDES | Fabaceae | Dicot |
| 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 wildrye | Elymus glaucus ssp. virescens | ELGLV | Poaceae | Monocot |
| blue windflower | Anemone oregana var. oregana | ANORO | Ranunculaceae | Dicot |
| blue windflower | Anemone oregana | ANOR | Ranunculaceae | Dicot |
| 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 |
| bluecurls | Trichostema | TRICH9 | Lamiaceae | Dicot |
| bluefly honeysuckle | Lonicera caerulea var. cauriana | LOCAC3 | Caprifoliaceae | Dicot |
| bluegrass | Poa | POA | 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 |
| bluejoint | Calamagrostis canadensis var. langsdorffii | CACAL3 | Poaceae | Monocot |
| blunt spikerush | Eleocharis obtusa | ELOB2 | Cyperaceae | 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 |
| Boccone"s sandspurry | Spergularia bocconii | SPBO | Caryophyllaceae | Dicot |
| bog anemone | Anemone oregana var. felix | ANORF | Ranunculaceae | 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 chickweed | Stellaria alsine | STAL4 | Caryophyllaceae | Dicot |
| bog Labrador tea | Ledum groenlandicum | LEGR | Ericaceae | Dicot |
| bog rosemary | Andromeda | ANDRO | Ericaceae | Dicot |
| bog rosemary | Andromeda polifolia | ANPO | Ericaceae | Dicot |
| bog rosemary | Andromeda polifolia var. polifolia | ANPOP | Ericaceae | Dicot |
| bog sedge | Kobresia | KOBRE | Cyperaceae | Monocot |
| bog smartweed | Polygonum setaceum | POSE6 | Polygonaceae | Dicot |
| bog white violet | Viola lanceolata | VILA4 | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. lanceolata | VILAL | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. occidentalis | VILAO | Violaceae | Dicot |
| bog willow | Salix pedicellaris | SAPE2 | Salicaceae | Dicot |
| bog willowherb | Epilobium leptophyllum | EPLE2 | Onagraceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| bogmat | Wolffiella | WOLFF2 | Lemnaceae | Monocot |
| Bolander"s bluegrass | Poa bolanderi | POBO | Poaceae | Monocot |
| Bolander"s linanthus | Leptosiphon bolanderi | LEBO9 | Polemoniaceae | Dicot |
| Bolander"s pea | Lathyrus vestitus ssp. bolanderi | LAVEB | Fabaceae | Dicot |
| Bolander"s phacelia | Phacelia bolanderi | PHBO | Hydrophyllaceae | Dicot |
| Bolander"s quillwort | Isoetes bolanderi | ISBO | Isoetaceae | Quillwort |
| Bolander"s ragwort | Packera bolanderi | PABO6 | Asteraceae | Dicot |
| Bolander"s ragwort | Packera bolanderi var. bolanderi | PABOB | Asteraceae | Dicot |
| Bolander"s rush | Juncus bolanderi | JUBO | Juncaceae | Monocot |
| Bolander"s sedge | Carex bolanderi | CABO2 | Cyperaceae | Monocot |
| Bolander"s water-starwort | Callitriche heterophylla ssp. bolanderi | CAHEB3 | Callitrichaceae | Dicot |
| Bolander"s yampah | Perideridia bolanderi | PEBO2 | Apiaceae | Dicot |
| Bolander"s yampah | Perideridia bolanderi ssp. bolanderi | PEBOB | Apiaceae | Dicot |
| 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 evening primrose | Camissonia boothii | CABO7 | Onagraceae | Dicot |
| Booth"s suncup | Camissonia boothii ssp. boothii | CABOB | Onagraceae | Dicot |
| Booth"s willow | Salix boothii | SABO2 | Salicaceae | Dicot |
| borage | Borago | BORAG | Boraginaceae | Dicot |
| boraxweed | Nitrophila occidentalis | NIOC2 | Chenopodiaceae | Dicot |
| border privet | Ligustrum obtusifolium | LIOB | Oleaceae | Dicot |
| boreal bedstraw | Galium kamtschaticum | GAKA | Rubiaceae | 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 |
| boreal yarrow | Achillea millefolium var. borealis | ACMIB | Asteraceae | Dicot |
| bottlebrush sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| Bourgeau"s pepperweed | Lepidium ramosissimum var. bourgeauanum | LERAB2 | Brassicaceae | 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. negundo | ACNEN | 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. atrosanguinea | PEBRA | Scrophulariaceae | Dicot |
| bracted lousewort | Pedicularis bracteosa var. bracteosa | PEBRB | Scrophulariaceae | Dicot |
| bractless hedgehyssop | Gratiola ebracteata | GREB | Scrophulariaceae | Dicot |
| Bradshaw"s desertparsley | Lomatium bradshawii | LOBR | Apiaceae | Dicot |
| branched Indian clover | Trifolium dichotomum | TRDI6 | Fabaceae | Dicot |
| branched lagophylla | Lagophylla ramosissima | LARA | Asteraceae | Dicot |
| branched lagophylla | Lagophylla ramosissima ssp. ramosissima | LARAR | Asteraceae | Dicot |
| branching phacelia | Phacelia ramosissima | PHRA2 | Hydrophyllaceae | Dicot |
| branching phacelia | Phacelia ramosissima var. ramosissima | PHRAR | Hydrophyllaceae | Dicot |
| Brandegee"s desertparsley | Lomatium brandegeei | LOBR2 | Apiaceae | Dicot |
| brasenia | Brasenia | BRASE | Cabombaceae | Dicot |
| Brazilian watermeal | Wolffia brasiliensis | WOBR | Lemnaceae | Monocot |
| Brazilian waterweed | Egeria densa | EGDE | Hydrocharitaceae | Monocot |
| Brewer"s bittercress | Cardamine breweri var. orbicularis | CABRO | Brassicaceae | 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 |
| Brewer"s navarretia | Navarretia breweri | NABR | Polemoniaceae | Dicot |
| Brewer"s rush | Juncus breweri | JUBR10 | Juncaceae | Monocot |
| Brewer"s sedge | Carex breweri | CABR12 | Cyperaceae | Monocot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| bride"s bonnet | Clintonia uniflora | CLUN2 | Liliaceae | Monocot |
| bride"s feathers | Aruncus dioicus | ARDI8 | Rosaceae | Dicot |
| bride"s feathers | Aruncus dioicus var. acuminatus | ARDIA | Rosaceae | Dicot |
| brightblue speedwell | Veronica serpyllifolia ssp. humifusa | VESEH2 | Scrophulariaceae | Dicot |
| brightgreen spleenwort | Asplenium trichomanes-ramosum | ASTR10 | Aspleniaceae | Fern |
| bristleflower collomia | Collomia macrocalyx | COMA3 | Polemoniaceae | Dicot |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristleleaf bulrush | Isolepis setacea | ISSE2 | Cyperaceae | Monocot |
| bristly dewberry | Rubus hispidus | RUHI | Rosaceae | Dicot |
| bristly dogstail grass | Cynosurus echinatus | CYEC | Poaceae | Monocot |
| bristly fiddleneck | Amsinckia tessellata | AMTE3 | Boraginaceae | Dicot |
| bristly fiddleneck | Amsinckia tessellata var. tessellata | AMTET | Boraginaceae | Dicot |
| bristly hawksbeard | Crepis setosa | CRSE2 | Asteraceae | Dicot |
| bristly locust | Robinia hispida | ROHI | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. hispida | ROHIH | Fabaceae | Dicot |
| bristly mousetail | Myosurus apetalus | MYAP | Ranunculaceae | Dicot |
| bristly mousetail | Myosurus apetalus var. borealis | MYAPB | 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 |
| bristlystem checkerbloom | Sidalcea hirtipes | SIHI3 | Malvaceae | Dicot |
| British alkaligrass | Puccinellia rupestris | PURU | Poaceae | Monocot |
| British Columbia wildginger | Asarum caudatum | ASCA2 | Aristolochiaceae | Dicot |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle pricklypear | Opuntia fragilis | OPFR | Cactaceae | Dicot |
| brittle sandwort | Minuartia nuttallii ssp. fragilis | MINUF | Caryophyllaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit | GATE2 | Lamiaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit var. arvensis | GATEA2 | Lamiaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit var. tetrahit | GATET2 | Lamiaceae | Dicot |
| broad-leaf mullein | Verbascum pulverulentum | VEPU9 | Scrophulariaceae | Dicot |
| broadfruit bur-reed | Sparganium eurycarpum | SPEU | Sparganiaceae | Monocot |
| broadfruit mariposa lily | Calochortus nitidus | CANI | Liliaceae | Monocot |
| broadleaf arnica | Arnica latifolia | ARLA8 | Asteraceae | Dicot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf bluebells | Mertensia platyphylla | MEPL | Boraginaceae | Dicot |
| broadleaf bluebells | Mertensia platyphylla var. platyphylla | MEPLP | Boraginaceae | Dicot |
| broadleaf bluebells | Mertensia platyphylla var. subcordata | MEPLS | Boraginaceae | Dicot |
| broadleaf cattail | Typha latifolia | TYLA | Typhaceae | Monocot |
| broadleaf false carrot | Turgenia latifolia | TULA | Apiaceae | Dicot |
| broadleaf forget-me-not | Myosotis latifolia | MYLA4 | Boraginaceae | Dicot |
| broadleaf helleborine | Epipactis helleborine | EPHE | Orchidaceae | Monocot |
| broadleaf knotweed | Polygonum minimum | POMI2 | Polygonaceae | Dicot |
| broadleaf lupine | Lupinus latifolius | LULA4 | Fabaceae | Dicot |
| broadleaf lupine | Lupinus latifolius ssp. latifolius | LULAL3 | Fabaceae | Dicot |
| broadleaf starflower | Trientalis borealis ssp. latifolia | TRBOL | Primulaceae | Dicot |
| broadleaf stonecrop | Sedum spathulifolium | SESP | Crassulaceae | Dicot |
| broadleaf stonecrop | Sedum spathulifolium ssp. pruinosum | SESPP | Crassulaceae | Dicot |
| broadleaf stonecrop | Sedum spathulifolium ssp. spathulifolium | SESPS | Crassulaceae | Dicot |
| 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 |
| brodiaea | Brodiaea | BRODI | Liliaceae | Monocot |
| 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 | Boykinia | BOYKI | Saxifragaceae | Dicot |
| brookweed | Samolus | SAMOL | Primulaceae | Dicot |
| broom | Spartium | SPART2 | Fabaceae | Dicot |
| broom | Genista | GENIS | Fabaceae | 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 |
| brownfruit rush | Juncus pelocarpus | JUPE | Juncaceae | Monocot |
| brownhead rush | Juncus phaeocephalus | JUPH | Juncaceae | Monocot |
| brownhead rush | Juncus phaeocephalus var. phaeocephalus | JUPHP2 | Juncaceae | Monocot |
| brownish sedge | Carex brunnescens | CABR15 | Cyperaceae | Monocot |
| brownish sedge | Carex brunnescens ssp. sphaerostachya | CABRS | Cyperaceae | Monocot |
| brownray knapweed | Centaurea jacea | CEJA | Asteraceae | Dicot |
| bryony | Bryonia | BRYON | Cucurbitaceae | Dicot |
| buckbean | Menyanthes | MENYA | Menyanthaceae | Dicot |
| buckbean | Menyanthes trifoliata | METR3 | Menyanthaceae | Dicot |
| buckeye | Aesculus | AESCU | Hippocastanaceae | Dicot |
| buckhorn plantain | Plantago coronopus | PLCO3 | Plantaginaceae | 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 milkvetch | Astragalus caricinus | ASCA12 | Fabaceae | Dicot |
| Buek"s groundsel | Packera subnuda | PASU40 | Asteraceae | Dicot |
| buffaloberry | Shepherdia | SHEPH | Elaeagnaceae | Dicot |
| buffalobur nightshade | Solanum rostratum | SORO | Solanaceae | Dicot |
| 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 |
| 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 rush | Juncus bulbosus | JUBU2 | Juncaceae | Monocot |
| bulbous woodland-star | Lithophragma glabrum | LIGL2 | Saxifragaceae | Dicot |
| bull clover | Trifolium fucatum | TRFU | Fabaceae | Dicot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bulrush | Isolepis | ISOLE | Cyperaceae | Monocot |
| bulrush | Trichophorum | TRICH22 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bunchberry dogwood | Cornus canadensis | COCA13 | Cornaceae | Dicot |
| bur chervil | Anthriscus caucalis | ANCA14 | Apiaceae | 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 |
| burnweed | Erechtites | ERECH | Asteraceae | Dicot |
| burrweed | Soliva | SOLIV | Asteraceae | Dicot |
| bush penstemon | Penstemon fruticosus | PEFR3 | Scrophulariaceae | Dicot |
| bush penstemon | Penstemon fruticosus var. fruticosus | PEFRF4 | 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 knotweed | Polygonum ramosissimum | PORA3 | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. prolificum | PORAP | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. ramosissimum | PORAR | Polygonaceae | Dicot |
| 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 |
| butterflybush | Buddleja | BUDDL2 | Buddlejaceae | Dicot |
| butterwort | Pinguicula | PINGU | Lentibulariaceae | Dicot |
| buttonbush dodder | Cuscuta cephalanthi | CUCE | Cuscutaceae | Dicot |
| Buxbaum"s sedge | Carex buxbaumii | CABU6 | Cyperaceae | Monocot |
| cabbage | Brassica oleracea | BROL | Brassicaceae | Dicot |
| cacaliopsis | Cacaliopsis | CACAL4 | Asteraceae | Dicot |
| calamus | Acorus calamus | ACCA4 | Acoraceae | Monocot |
| calicoflower | Downingia | DOWNI | Campanulaceae | Dicot |
| California amaranth | Amaranthus californicus | AMCA | Amaranthaceae | Dicot |
| California bastard toadflax | Comandra umbellata ssp. californica | COUMC | Santalaceae | Dicot |
| California blackberry | Rubus ursinus | RUUR | Rosaceae | Dicot |
| California blackberry | Rubus ursinus ssp. macropetalus | RUURM | Rosaceae | Dicot |
| California brome | Bromus carinatus | BRCA5 | Poaceae | Monocot |
| California broomrape | Orobanche californica | ORCA2 | Orobanchaceae | Dicot |
| California broomrape | Orobanche californica ssp. californica | ORCAC2 | Orobanchaceae | Dicot |
| California buttercup | Ranunculus californicus | RACA2 | Ranunculaceae | Dicot |
| California butterwort | Pinguicula macroceras | PIMA7 | Lentibulariaceae | Dicot |
| California butterwort | Pinguicula macroceras var. macroceras | PIMAM2 | Lentibulariaceae | Dicot |
| California compassplant | Wyethia angustifolia | WYAN | Asteraceae | Dicot |
| California damsonium | Damasonium californicum | DACA12 | Alismataceae | Monocot |
| California false hellebore | Veratrum californicum | VECA2 | Liliaceae | Monocot |
| California false hellebore | Veratrum californicum var. californicum | VECAC2 | Liliaceae | Monocot |
| California goose tongue | Plantago maritima var. californica | PLMAC2 | Plantaginaceae | Dicot |
| California hazelnut | Corylus cornuta var. californica | COCOC | Betulaceae | Dicot |
| California hesperochiron | Hesperochiron californicus | HECA7 | Hydrophyllaceae | Dicot |
| California huckleberry | Vaccinium ovatum | VAOV2 | Ericaceae | Dicot |
| California knotweed | Polygonum californicum | POCA7 | Polygonaceae | Dicot |
| California mustard | Guillenia lasiophylla | GULA4 | Brassicaceae | Dicot |
| California needlegrass | Achnatherum occidentale ssp. californicum | ACOCC | Poaceae | Monocot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| California oatgrass | Danthonia californica | DACA3 | Poaceae | Monocot |
| California pinefoot | Pityopus californica | PICA9 | Monotropaceae | Dicot |
| California pitcherplant | Darlingtonia | DARLI | Sarraceniaceae | Dicot |
| California pitcherplant | Darlingtonia californica | DACA5 | Sarraceniaceae | Dicot |
| California poppy | Eschscholzia | ESCHS | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica | ESCA2 | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica ssp. californica | ESCAC | Papaveraceae | Dicot |
| California privet | Ligustrum ovalifolium | LIOV | Oleaceae | Dicot |
| California rayless fleabane | Erigeron inornatus | ERIN2 | Asteraceae | Dicot |
| California rayless fleabane | Erigeron inornatus var. inornatus | ERINI | Asteraceae | Dicot |
| California seapink | Armeria maritima ssp. californica | ARMAC2 | Plumbaginaceae | Dicot |
| California sedge | Carex californica | CACA9 | Cyperaceae | Monocot |
| California sweetgrass | Hierochloe occidentalis | HIOC | Poaceae | Monocot |
| California swordfern | Polystichum californicum | POCA25 | Dryopteridaceae | Fern |
| California waterwort | Elatine californica | ELCA | Elatinaceae | Dicot |
| California wax myrtle | Morella californica | MOCA6 | Myricaceae | Dicot |
| California yarrow | Achillea millefolium var. californica | ACMIC | Asteraceae | Dicot |
| camas | Camassia | CAMAS | Liliaceae | Monocot |
| camelthorn | Alhagi maurorum | ALMA12 | Fabaceae | Dicot |
| camphor tansy | Tanacetum camphoratum | TACA2 | Asteraceae | Dicot |
| campion | Lychnis | LYCHN | Caryophyllaceae | 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 toadflax | Nuttallanthus canadensis | NUCA | Scrophulariaceae | Dicot |
| Canada wildrye | Elymus canadensis | ELCA4 | Poaceae | Monocot |
| Canadian burnet | Sanguisorba canadensis | SACA14 | Rosaceae | Dicot |
| 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 rush | Juncus canadensis | JUCA3 | Juncaceae | Monocot |
| Canadian sandspurry | Spergularia canadensis | SPCA3 | Caryophyllaceae | Dicot |
| Canadian waterweed | Elodea canadensis | ELCA7 | Hydrocharitaceae | Monocot |
| Canadian white violet | Viola canadensis | VICA4 | Violaceae | Dicot |
| Canary broom | Genista canariensis | GECA16 | Fabaceae | Dicot |
| canary violet | Viola praemorsa | VIPR3 | Violaceae | Dicot |
| canary violet | Viola praemorsa ssp. praemorsa | VIPRP | Violaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| Canby"s angelica | Angelica canbyi | ANCA11 | Apiaceae | Dicot |
| Canby"s aster | Symphyotrichum foliaceum var. canbyi | SYFOC | Asteraceae | Dicot |
| Canby"s biscuitroot | Lomatium canbyi | LOCA4 | Apiaceae | 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 |
| candelabrum monkeyflower | Mimulus pulsiferae | MIPU2 | Scrophulariaceae | Dicot |
| candytuft | Smelowskia | SMELO | Brassicaceae | Dicot |
| Canterbury bells | Campanula medium | CAME20 | Campanulaceae | 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 |
| cardionema | Cardionema | CARDI | Caryophyllaceae | Dicot |
| cardoon | Cynara cardunculus | CYCA | Asteraceae | Dicot |
| Cardwell"s beardtongue | Penstemon cardwellii | PECA16 | Scrophulariaceae | Dicot |
| carelessweed | Cyclachaena | CYCLA4 | Asteraceae | Dicot |
| Carelessweed | Cyclachaena xanthiifolia | CYXA2 | Asteraceae | Dicot |
| Carey"s balsamroot | Balsamorhiza careyana | BACA3 | Asteraceae | Dicot |
| Carey"s balsamroot | Balsamorhiza careyana var. careyana | BACAC | Asteraceae | Dicot |
| Carolina bugbane | Trautvetteria caroliniensis | TRCA | Ranunculaceae | Dicot |
| Carolina draba | Draba reptans | DRRE2 | Brassicaceae | Dicot |
| Carolina fanwort | Cabomba caroliniana | CACA | Cabombaceae | Dicot |
| Carolina fanwort | Cabomba caroliniana var. caroliniana | CACAC4 | Cabombaceae | 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 |
| Carolina horsenettle | Solanum carolinense | SOCA3 | Solanaceae | Dicot |
| Carolina horsenettle | Solanum carolinense var. carolinense | SOCAC4 | Solanaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. canescens | PHHOC | Polemoniaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. lanata | PHHOL | 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 |
| Cascade aster | Eucephalus ledophyllus | EULE14 | Asteraceae | Dicot |
| Cascade aster | Eucephalus ledophyllus var. ledophyllus | EULEL2 | Asteraceae | Dicot |
| Cascade azalea | Rhododendron albiflorum | RHAL2 | Ericaceae | Dicot |
| Cascade azalea | Rhododendron albiflorum var. albiflorum | RHALA | Ericaceae | Dicot |
| Cascade barberry | Mahonia nervosa | MANE2 | Berberidaceae | Dicot |
| Cascade bilberry | Vaccinium deliciosum | VADE | Ericaceae | Dicot |
| cascade calicoflower | Downingia yina | DOYI | Campanulaceae | Dicot |
| cascade desertparsley | Lomatium martindalei | LOMA5 | Apiaceae | Dicot |
| Cascade false hellebore | Veratrum californicum var. caudatum | VECAC | Liliaceae | Monocot |
| Cascade mountain ash | Sorbus scopulina var. cascadensis | SOSCC | Rosaceae | Dicot |
| Cascade rockbrake | Cryptogramma cascadensis | CRCA23 | Pteridaceae | Fern |
| cascade wallflower | Erysimum arenicola | ERAR15 | Brassicaceae | Dicot |
| 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 |
| catnip | Nepeta | NEPET | Lamiaceae | Dicot |
| catnip | Nepeta cataria | NECA2 | Lamiaceae | Dicot |
| cattail | Typha | TYPHA | Typhaceae | Monocot |
| Caucasian stonecrop | Phedimus spurius | PHSP9 | Crassulaceae | Dicot |
| ceanothus | Ceanothus | CEANO | Rhamnaceae | 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 |
| celeryleaf licorice-root | Ligusticum apiifolium | LIAP | Apiaceae | Dicot |
| centaury | Centaurium | CENTA2 | Gentianaceae | Dicot |
| centranthus | Centranthus | CENTR | Valerianaceae | Dicot |
| cephalanthera | Cephalanthera | CEPHA3 | Orchidaceae | Monocot |
| cereal rye | Secale cereale | SECE | Poaceae | Monocot |
| chaffweed | Anagallis minima | ANMI4 | Primulaceae | Dicot |
| chainfern | Woodwardia | WOODW | Blechnaceae | Fern |
| 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. incana | ARCHI4 | Asteraceae | Dicot |
| chamisso sedge | Carex pachystachya | CAPA14 | Cyperaceae | Monocot |
| Chamisso"s cottongrass | Eriophorum chamissonis | ERCH7 | Cyperaceae | Monocot |
| chamomile | Anthemis | ANTHE | Asteraceae | Dicot |
| changeable phacelia | Phacelia mutabilis | PHMU2 | Hydrophyllaceae | Dicot |
| changing forget-me-not | Myosotis discolor | MYDI | Boraginaceae | 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 |
| chaparral willowherb | Epilobium minutum | EPMI | Onagraceae | Dicot |
| charlock mustard | Sinapis arvensis | SIAR4 | Brassicaceae | Dicot |
| cheatgrass | Bromus tectorum | BRTE | Poaceae | Monocot |
| checker lily | Fritillaria affinis | FRAF2 | Liliaceae | Monocot |
| checker lily | Fritillaria affinis var. affinis | FRAFA2 | Liliaceae | Monocot |
| checkerbloom | Sidalcea | SIDAL | Malvaceae | Dicot |
| cheeseweed mallow | Malva parviflora | MAPA5 | Malvaceae | Dicot |
| Chelan beardtongue | Penstemon pruinosus | PEPR3 | Scrophulariaceae | Dicot |
| cherry laurel | Prunus laurocerasus | PRLA5 | Rosaceae | Dicot |
| cherry plum | Prunus cerasifera | PRCE2 | Rosaceae | Dicot |
| chervil | Anthriscus | ANTHR | Apiaceae | Dicot |
| chick pea | Cicer arietinum | CIAR5 | Fabaceae | Dicot |
| chickenclaws | Sarcocornia perennis | SAPE11 | Chenopodiaceae | Dicot |
| chickpea milkvetch | Astragalus cicer | ASCI4 | Fabaceae | Dicot |
| chicory | Cichorium | CICHO | Asteraceae | Dicot |
| chicory | Cichorium intybus | CIIN | Asteraceae | Dicot |
| Chilean rabbitsfoot grass | Polypogon australis | POAU3 | Poaceae | Monocot |
| Chilean rush | Juncus falcatus ssp. sitchensis | JUFAS2 | Juncaceae | Monocot |
| Chimissso"s orchid | Platanthera chorisiana | PLCH3 | Orchidaceae | Monocot |
| Chinese crab apple | Malus hupehensis | MAHU2 | Rosaceae | Dicot |
| Chinook brome | Bromus laevipes | BRLA3 | Poaceae | Monocot |
| chinquapin | Chrysolepis | CHRYS15 | Fagaceae | Dicot |
| chokecherry | Prunus virginiana | PRVI | Rosaceae | Dicot |
| chondrilla | Chondrilla | CHOND | Asteraceae | Dicot |
| chorispora | Chorispora | CHORI | Brassicaceae | Dicot |
| cicer | Cicer | CICER | Fabaceae | Dicot |
| cinquefoil | Potentilla | POTEN | Rosaceae | Dicot |
| city goosefoot | Chenopodium urbicum | CHUR | Chenopodiaceae | Dicot |
| clammy goosefoot | Dysphania pumilio | DYPU | Chenopodiaceae | 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 pennycress | Microthlaspi perfoliatum | MIPE8 | Brassicaceae | Dicot |
| claspleaf twistedstalk | Streptopus amplexifolius | STAM2 | Liliaceae | Monocot |
| claspleaf twistedstalk | Streptopus amplexifolius var. amplexifolius | STAMA2 | Liliaceae | Monocot |
| Clearwater cryptantha | Cryptantha intermedia | CRIN8 | Boraginaceae | Dicot |
| cliff beardtongue | Penstemon rupicola | PERU | Scrophulariaceae | Dicot |
| cliff dwarf-primrose | Douglasia laevigata | DOLA | Primulaceae | Dicot |
| cliff dwarf-primrose | Douglasia laevigata var. ciliolata | DOLAC | Primulaceae | Dicot |
| cliff dwarf-primrose | Douglasia laevigata var. laevigata | DOLAL | Primulaceae | Dicot |
| cliff fern | Woodsia | WOODS | Dryopteridaceae | Fern |
| cliff Indian paintbrush | Castilleja rupicola | CARU9 | Scrophulariaceae | Dicot |
| cliffbrake | Pellaea | PELLA | Pteridaceae | Fern |
| climbing nightshade | Solanum dulcamara | SODU | Solanaceae | Dicot |
| climbing nightshade | Solanum dulcamara var. dulcamara | SODUD | Solanaceae | Dicot |
| climbing nightshade | Solanum dulcamara var. villosissimum | SODUV | 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 |
| clubawn grass | Corynephorus | CORYN | Poaceae | Monocot |
| clubmoss | Lycopodiella | LYCOP6 | Lycopodiaceae | Lycopod |
| clubmoss | Lycopodium | LYCOP2 | Lycopodiaceae | Lycopod |
| clubmoss | Huperzia | HUPER | Lycopodiaceae | Lycopod |
| clubmoss mountain heather | Cassiope lycopodioides | CALY4 | Ericaceae | Dicot |
| clubmoss mountain heather | Cassiope lycopodioides var. cristapilosa | CALYC6 | Ericaceae | Dicot |
| cluster mallow | Malva verticillata | MAVE | Malvaceae | Dicot |
| cluster rose | Rosa pisocarpa | ROPI2 | Rosaceae | Dicot |
| cluster rose | Rosa pisocarpa ssp. pisocarpa | ROPIP | Rosaceae | Dicot |
| clustered broomrape | Orobanche fasciculata | ORFA | Orobanchaceae | Dicot |
| clustered dock | Rumex conglomeratus | RUCO2 | Polygonaceae | Dicot |
| clustered field sedge | Carex praegracilis | CAPR5 | Cyperaceae | Monocot |
| clustered green gentian | Frasera fastigiata | FRFA | Gentianaceae | Dicot |
| clustered lady"s slipper | Cypripedium fasciculatum | CYFA | Orchidaceae | Monocot |
| clustered thistle | Cirsium brevistylum | CIBR2 | Asteraceae | Dicot |
| cnicus | Cnicus | CNICU | Asteraceae | Dicot |
| coast agropogon | ×Agropogon littoralis | AGLI | Poaceae | Monocot |
| coast Indian paintbrush | Castilleja affinis | CAAF | Scrophulariaceae | Dicot |
| coast Indian paintbrush | Castilleja affinis ssp. litoralis | CAAFL2 | Scrophulariaceae | Dicot |
| coast plantain | Plantago bigelovii | PLBI2 | Plantaginaceae | Dicot |
| coast plantain | Plantago bigelovii ssp. bigelovii | PLBIB | Plantaginaceae | Dicot |
| coast tarweed | Madia sativa | MASA | Asteraceae | Dicot |
| coastal brookfoam | Boykinia occidentalis | BOOC2 | Saxifragaceae | Dicot |
| coastal burnweed | Erechtites minima | ERMI6 | Asteraceae | Dicot |
| coastal goldfields | Lasthenia minor | LAMI5 | Asteraceae | Dicot |
| coastal hedgenettle | Stachys chamissonis | STCH | Lamiaceae | Dicot |
| coastal hedgenettle | Stachys chamissonis var. cooleyae | STCHC3 | Lamiaceae | Dicot |
| coastal manroot | Marah oreganus | MAOR3 | Cucurbitaceae | Dicot |
| coastal miterwort | Mitella ovalis | MIOV | Saxifragaceae | Dicot |
| coastal monkeyflower | Mimulus dentatus | MIDE3 | Scrophulariaceae | Dicot |
| coastal sand verbena | Abronia latifolia | ABLA2 | Nyctaginaceae | Dicot |
| coastal silverpuffs | Microseris bigelovii | MIBI | Asteraceae | Dicot |
| coastal woodfern | Dryopteris arguta | DRAR3 | Dryopteridaceae | Fern |
| coastal wormwood | Artemisia suksdorfii | ARSU4 | Asteraceae | Dicot |
| coastline bluegrass | Poa confinis | POCO2 | Poaceae | Monocot |
| cocklebur | Xanthium | XANTH2 | Asteraceae | Dicot |
| cockspur grass | Echinochloa | ECHIN4 | Poaceae | Monocot |
| codlins and cream | Epilobium hirsutum | EPHI | Onagraceae | Dicot |
| coiled lousewort | Pedicularis contorta | PECO | Scrophulariaceae | Dicot |
| coiled lousewort | Pedicularis contorta var. contorta | PECOC2 | Scrophulariaceae | Dicot |
| coiled sedge | Carex circinata | CACI5 | Cyperaceae | Monocot |
| coldwater fumewort | Corydalis caseana ssp. aquae-gelidae | COCAA | Fumariaceae | Dicot |
| Collins" rockcress | Arabis holboellii var. collinsii | ARHOC | Brassicaceae | Dicot |
| colonial bentgrass | Agrostis capillaris | AGCA5 | Poaceae | Monocot |