List of Nebraska Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| absinthium | Artemisia absinthium | ARAB3 | Asteraceae | Dicot |
| Adam"s needle | Yucca filamentosa | YUFI | Agavaceae | Monocot |
| adderstongue | Ophioglossum | OPHIO | Ophioglossaceae | Fern |
| Adonis blazingstar | Mentzelia multiflora | MEMU3 | Loasaceae | Dicot |
| Adonis blazingstar | Mentzelia multiflora var. multiflora | MEMUM2 | Loasaceae | Dicot |
| African dogstooth grass | Cynodon transvaalensis | CYTR | Poaceae | Monocot |
| agoseris | Agoseris | AGOSE | Asteraceae | Dicot |
| agrimony | Agrimonia | AGRIM | Rosaceae | Dicot |
| ailanthus | Ailanthus | AILAN | Simaroubaceae | Dicot |
| alderleaf mountain mahogany | Cercocarpus montanus | CEMO2 | Rosaceae | Dicot |
| alderleaf mountain mahogany | Cercocarpus montanus var. montanus | CEMOM4 | Rosaceae | 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 |
| aliciella | Aliciella | ALICI | Polemoniaceae | Dicot |
| alkali buttercup | Ranunculus cymbalaria | RACY | Ranunculaceae | Dicot |
| alkali cordgrass | Spartina gracilis | SPGR | Poaceae | Monocot |
| alkali sacaton | Sporobolus airoides | SPAI | Poaceae | Monocot |
| alkaligrass | Puccinellia | PUCCI | Poaceae | Monocot |
| Allegheny blackberry | Rubus allegheniensis | RUAL | Rosaceae | Dicot |
| Allegheny blackberry | Rubus allegheniensis var. allegheniensis | RUALA | Rosaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens | MIRI | Scrophulariaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens var. ringens | MIRIR | Scrophulariaceae | Dicot |
| alliaria | Alliaria | ALLIA | Brassicaceae | 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 golden buckwheat | Eriogonum flavum | ERFL4 | Polygonaceae | Dicot |
| alpine golden buckwheat | Eriogonum flavum var. flavum | ERFLF | Polygonaceae | Dicot |
| alpine leafybract aster | Symphyotrichum foliaceum | SYFO2 | Asteraceae | Dicot |
| alpine sweetvetch | Hedysarum alpinum | HEAL | Fabaceae | Dicot |
| alsike clover | Trifolium hybridum | TRHY | Fabaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| alyssum | Alyssum simplex | ALSI8 | Brassicaceae | Dicot |
| alyssumleaf phlox | Phlox alyssifolia | PHAL3 | Polemoniaceae | Dicot |
| alyssumleaf phlox | Phlox alyssifolia ssp. alyssifolia | PHALA5 | Polemoniaceae | Dicot |
| amberique-bean | Strophostyles helvola | STHE9 | Fabaceae | Dicot |
| American alumroot | Heuchera americana | HEAM6 | Saxifragaceae | Dicot |
| American alumroot | Heuchera americana var. hirsuticaulis | HEAMH | Saxifragaceae | Dicot |
| American basswood | Tilia americana | TIAM | Tiliaceae | Dicot |
| American basswood | Tilia americana var. americana | TIAMA | Tiliaceae | Dicot |
| American bellflower | Campanulastrum americanum | CAAM18 | Campanulaceae | Dicot |
| American bird"s-foot trefoil | Lotus unifoliolatus | LOUN | Fabaceae | Dicot |
| American bird"s-foot trefoil | Lotus unifoliolatus var. unifoliolatus | LOUNU | Fabaceae | 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 bladdernut | Staphylea trifolia | STTR | Staphyleaceae | Dicot |
| American bugseed | Corispermum americanum | COAM8 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. americanum | COAMA2 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. rydbergii | COAMR | Chenopodiaceae | Dicot |
| American 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 elm | Ulmus americana | ULAM | Ulmaceae | Dicot |
| American false pennyroyal | Hedeoma pulegioides | HEPU | Lamiaceae | Dicot |
| American ginseng | Panax quinquefolius | PAQU | Araliaceae | Dicot |
| American hazelnut | Corylus americana | COAM3 | Betulaceae | 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 lopseed | Phryma leptostachya | PHLE5 | Verbenaceae | Dicot |
| American lotus | Nelumbo lutea | NELU | Nelumbonaceae | 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 sloughgrass | Beckmannia syzigachne | BESY | Poaceae | Monocot |
| American speedwell | Veronica americana | VEAM2 | Scrophulariaceae | Dicot |
| American spikenard | Aralia racemosa | ARRA | Araliaceae | Dicot |
| American spikenard | Aralia racemosa ssp. racemosa | ARRAR | Araliaceae | Dicot |
| American stickseed | Hackelia deflexa var. americana | HADEA | Boraginaceae | Dicot |
| American sycamore | Platanus occidentalis | PLOC | Platanaceae | 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 water plantain | Alisma subcordatum | ALSU | Alismataceae | Monocot |
| American white waterlily | Nymphaea odorata | NYOD | Nymphaeaceae | Dicot |
| American white waterlily | Nymphaea odorata ssp. odorata | NYODO | Nymphaeaceae | Dicot |
| American white waterlily | Nymphaea odorata ssp. tuberosa | NYODT | Nymphaeaceae | Dicot |
| American woollyfruit sedge | Carex lasiocarpa var. americana | CALAA | Cyperaceae | Monocot |
| Amur honeysuckle | Lonicera maackii | LOMA6 | Caprifoliaceae | Dicot |
| Amur silvergrass | Miscanthus sacchariflorus | MISA | Poaceae | Monocot |
| Andean prairie clover | Dalea cylindriceps | DACY | Fabaceae | Dicot |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| annual bluegrass | Poa annua | POAN | Poaceae | Monocot |
| annual buckwheat | Eriogonum annuum | ERAN4 | Polygonaceae | Dicot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual marsh elder | Iva annua | IVAN2 | Asteraceae | Dicot |
| annual marsh elder | Iva annua var. annua | IVANA | Asteraceae | Dicot |
| annual muhly | Muhlenbergia minutissima | MUMI2 | Poaceae | Monocot |
| 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 |
| antelopehorns | Asclepias asperula ssp. capricornu | ASASC | Asclepiadaceae | Dicot |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apple of Peru | Nicandra physalodes | NIPH | Solanaceae | Dicot |
| arctic rush | Juncus arcticus | JUAR2 | Juncaceae | Monocot |
| aridland goosefoot | Chenopodium desiccatum | CHDE | Chenopodiaceae | Dicot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| aromatic aster | Symphyotrichum oblongifolium | SYOB | Asteraceae | Dicot |
| arrowfeather threeawn | Aristida purpurascens | ARPU8 | Poaceae | Monocot |
| arrowfeather threeawn | Aristida purpurascens var. purpurascens | ARPUP4 | Poaceae | Monocot |
| arrowgrass | Triglochin | TRIGL | Juncaginaceae | Monocot |
| arrowhead | Sagittaria | SAGIT | Alismataceae | Monocot |
| arrowhead rattlebox | Crotalaria sagittalis | CRSA4 | Fabaceae | Dicot |
| arrowleaf tearthumb | Polygonum sagittatum | POSA5 | Polygonaceae | Dicot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| ashy sunflower | Helianthus mollis | HEMO2 | Asteraceae | Dicot |
| Asiatic dayflower | Commelina communis | COCO3 | Commelinaceae | Monocot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| aster | Symphyotrichum ×amethystinum | SYAM3 | Asteraceae | Dicot |
| aster | Symphyotrichum ×batesii | SYBA | Asteraceae | Dicot |
| Atlantic ninebark | Physocarpus opulifolius var. intermedius | PHOPI | Rosaceae | Dicot |
| Atlantic pigeonwings | Clitoria mariana | CLMA4 | Fabaceae | Dicot |
| Aunt Lucy | Ellisia nyctelea | ELNY | Hydrophyllaceae | Dicot |
| Austrian yellowcress | Rorippa austriaca | ROAU | Brassicaceae | Dicot |
| autumn coralroot | Corallorhiza odontorhiza | COOD7 | Orchidaceae | Monocot |
| autumn coralroot | Corallorhiza odontorhiza var. odontorhiza | COODO2 | Orchidaceae | Monocot |
| autumn olive | Elaeagnus umbellata | ELUM | Elaeagnaceae | Dicot |
| autumn olive | Elaeagnus umbellata var. parvifolia | ELUMP | Elaeagnaceae | Dicot |
| avens | Geum | GEUM | Rosaceae | Dicot |
| awlfruit sedge | Carex stipata | CAST5 | Cyperaceae | Monocot |
| awned halfchaff sedge | Lipocarpha aristulata | LIAR6 | Cyperaceae | Monocot |
| azure blue sage | Salvia azurea | SAAZ | Lamiaceae | Dicot |
| baby"s breath | Gypsophila paniculata | GYPA | Caryophyllaceae | Dicot |
| baby"s-breath | Gypsophila | GYPSO | Caryophyllaceae | Dicot |
| bahia | Picradeniopsis | PICRA3 | Asteraceae | Dicot |
| bald brome | Bromus racemosus | BRRA2 | Poaceae | Monocot |
| bald spikerush | Eleocharis erythropoda | ELER | Cyperaceae | Monocot |
| Baldwin"s ironweed | Vernonia baldwinii | VEBA | Asteraceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta | IPCO5 | Polemoniaceae | Dicot |
| ballhead ipomopsis | Ipomopsis congesta ssp. congesta | IPCOC3 | Polemoniaceae | Dicot |
| balm-of-Gilead | Populus ×jackii | POJA2 | Salicaceae | Dicot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| barberry | Berberis | BERBE | Berberidaceae | Dicot |
| barberry | Mahonia | MAHON | Berberidaceae | 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 |
| basin wildrye | Leymus cinereus | LECI4 | Poaceae | Monocot |
| basswood | Tilia | TILIA | Tiliaceae | Dicot |
| bastard toadflax | Comandra umbellata ssp. umbellata | COUMU | Santalaceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bay forget-me-not | Myosotis laxa | MYLA | Boraginaceae | Dicot |
| beaked skeletonweed | Shinnersoseris | SHINN2 | Asteraceae | Dicot |
| beaked skeletonweed | Shinnersoseris rostrata | SHRO2 | Asteraceae | Dicot |
| beaked spikerush | Eleocharis rostellata | ELRO2 | Cyperaceae | Monocot |
| beakgrain | Diarrhena | DIARR | Poaceae | Monocot |
| beard lichen | Usnea | USNEA2 | Parmeliaceae | Lichen |
| bearded beggarticks | Bidens aristosa | BIAR | Asteraceae | Dicot |
| bearded flatsedge | Cyperus squarrosus | CYSQ | Cyperaceae | Monocot |
| bearded shorthusk | Brachyelytrum erectum | BRER2 | Poaceae | Monocot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| beardgrass | Bothriochloa | BOTHR | Poaceae | Monocot |
| beardless wheatgrass | Pseudoroegneria spicata ssp. inermis | PSSPI | Poaceae | Monocot |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| Bebb willow | Salix bebbiana | SABE2 | Salicaceae | Dicot |
| Bebb"s sedge | Carex bebbii | CABE2 | Cyperaceae | Monocot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| beebalm | Monarda | MONAR | Lamiaceae | Dicot |
| beeblossom | Gaura | GAURA | Onagraceae | Dicot |
| beefsteakplant | Perilla frutescens | PEFR4 | Lamiaceae | Dicot |
| beefsteakplant | Perilla frutescens var. frutescens | PEFRF2 | Lamiaceae | Dicot |
| beggarslice | Hackelia virginiana | HAVI2 | Boraginaceae | Dicot |
| beggarticks | Bidens | BIDEN | Asteraceae | Dicot |
| belamcanda | Belamcanda | BELAM | Iridaceae | Monocot |
| bellflower | Campanula | CAMPA | Campanulaceae | Dicot |
| bellflower | Campanulastrum | CAMPA2 | Campanulaceae | Dicot |
| bentgrass | Agrostis | AGROS2 | Poaceae | Monocot |
| bergia | Bergia | BERGI | Elatinaceae | Dicot |
| Berlandier"s yellow flax | Linum berlandieri | LIBE2 | Linaceae | Dicot |
| Berlandier"s yellow flax | Linum berlandieri var. berlandieri | LIBEB2 | Linaceae | Dicot |
| Bermudagrass | Cynodon | CYNOD | Poaceae | Monocot |
| Bermudagrass | Cynodon dactylon | CYDA | Poaceae | Monocot |
| biannual lettuce | Lactuca ludoviciana | LALU | Asteraceae | Dicot |
| Bicknell"s sedge | Carex bicknellii | CABI3 | Cyperaceae | Monocot |
| 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 sagebrush | Artemisia tridentata | ARTR2 | Asteraceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| bigfruit dodder | Cuscuta megalocarpa | CUME4 | Cuscutaceae | Dicot |
| bigfruit evening primrose | Oenothera macrocarpa | OEMA | Onagraceae | Dicot |
| bigfruit evening primrose | Oenothera macrocarpa ssp. macrocarpa | OEMAM | Onagraceae | Dicot |
| bighead pygmycudweed | Evax prolifera | EVPR | Asteraceae | Dicot |
| bigseed alfalfa dodder | Cuscuta indecora | CUIN | Cuscutaceae | Dicot |
| bigseed dodder | Cuscuta indecora var. neuropetala | CUINN | Cuscutaceae | Dicot |
| billion-dollar grass | Echinochloa frumentacea | ECFR | Poaceae | Monocot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus | LOCO6 | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus var. corniculatus | LOCOC5 | Fabaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdfoot violet | Viola pedata | VIPE | Violaceae | Dicot |
| bitter dock | Rumex obtusifolius | RUOB | Polygonaceae | Dicot |
| bitterbrush | Purshia | PURSH | Rosaceae | Dicot |
| bittercress | Cardamine | CARDA | Brassicaceae | Dicot |
| bitternut hickory | Carya cordiformis | CACO15 | Juglandaceae | Dicot |
| bittersweet | Celastrus | CELAS | Celastraceae | Dicot |
| black bindweed | Polygonum convolvulus | POCO10 | Polygonaceae | Dicot |
| black bindweed | Polygonum convolvulus var. convolvulus | POCOC2 | Polygonaceae | Dicot |
| black cherry | Prunus serotina | PRSE2 | Rosaceae | Dicot |
| black cherry | Prunus serotina var. serotina | PRSES | Rosaceae | Dicot |
| black chokecherry | Prunus virginiana var. melanocarpa | PRVIM | Rosaceae | Dicot |
| black elderberry | Sambucus nigra | SANI4 | Caprifoliaceae | Dicot |
| black henbane | Hyoscyamus niger | HYNI | Solanaceae | Dicot |
| black horehound | Ballota nigra | BANI | Lamiaceae | Dicot |
| black horehound | Ballota nigra var. nigra | BANIN | Lamiaceae | Dicot |
| black locust | Robinia pseudoacacia | ROPS | Fabaceae | Dicot |
| black medick | Medicago lupulina | MELU | Fabaceae | Dicot |
| black mustard | Brassica nigra | BRNI | Brassicaceae | Dicot |
| black oak | Quercus velutina | QUVE | Fagaceae | Dicot |
| black raspberry | Rubus occidentalis | RUOC | Rosaceae | Dicot |
| black walnut | Juglans nigra | JUNI | Juglandaceae | Dicot |
| black willow | Salix nigra | SANI | Salicaceae | Dicot |
| blackberry | Rubus | RUBUS | Rosaceae | Dicot |
| blackberry lily | Belamcanda chinensis | BECH | Iridaceae | Monocot |
| blackeyed Susan | Rudbeckia hirta | RUHI2 | Asteraceae | Dicot |
| blackeyed Susan | Rudbeckia hirta var. pulcherrima | RUHIP | Asteraceae | Dicot |
| blackfoot quillwort | Isoetes melanopoda | ISME | Isoetaceae | Quillwort |
| blackjack oak | Quercus marilandica | QUMA3 | Fagaceae | Dicot |
| blackjack oak | Quercus marilandica var. marilandica | QUMAM2 | Fagaceae | Dicot |
| 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 |
| blackseed ricegrass | Patis racemosa | PARA2 | Poaceae | Monocot |
| bladder campion | Silene latifolia | SILA21 | Caryophyllaceae | Dicot |
| bladder campion | Silene latifolia ssp. alba | SILAA3 | Caryophyllaceae | Dicot |
| bladderfern | Cystopteris | CYSTO | Dryopteridaceae | Fern |
| bladdernut | Staphylea | STAPH | Staphyleaceae | Dicot |
| bladderpod | Lesquerella | LESQU | Brassicaceae | Dicot |
| bladderwort | Utricularia | UTRIC | Lentibulariaceae | Dicot |
| blanketflower | Gaillardia | GAILL | Asteraceae | Dicot |
| blazing star | Liatris | LIATR | Asteraceae | Dicot |
| blazing star | Liatris ×weaveri | LIWE2 | Asteraceae | Dicot |
| blazingstar | Mentzelia | MENTZ | Loasaceae | Dicot |
| bleeding heart | Dicentra | DICEN | Fumariaceae | Dicot |
| blisterwort | Ranunculus recurvatus | RARE2 | Ranunculaceae | Dicot |
| blisterwort | Ranunculus recurvatus var. recurvatus | RARER2 | Ranunculaceae | Dicot |
| bloodroot | Sanguinaria | SANGU | Papaveraceae | Dicot |
| bloodroot | Sanguinaria canadensis | SACA13 | Papaveraceae | Dicot |
| blowout beardtongue | Penstemon haydenii | PEHA12 | Scrophulariaceae | Dicot |
| blowout grass | Redfieldia | REDFI | Poaceae | Monocot |
| blowout grass | Redfieldia flexuosa | REFL | Poaceae | Monocot |
| blue cohosh | Caulophyllum thalictroides | CATH2 | Berberidaceae | 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 mistflower | Conoclinium coelestinum | COCO13 | Asteraceae | Dicot |
| blue mudplantain | Heteranthera limosa | HELI2 | Pontederiaceae | Monocot |
| 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 waxweed | Cuphea viscosissima | CUVI | Lythraceae | Dicot |
| blue wild indigo | Baptisia australis | BAAU | Fabaceae | Dicot |
| blue wild indigo | Baptisia australis var. minor | BAAUM | Fabaceae | Dicot |
| blue-eyed grass | Sisyrinchium | SISYR | Iridaceae | Monocot |
| bluebell bellflower | Campanula rotundifolia | CARO2 | Campanulaceae | Dicot |
| bluebells | Mertensia | MERTE | Boraginaceae | Dicot |
| bluebill | Clematis pitcheri | CLPI | Ranunculaceae | Dicot |
| bluebill | Clematis pitcheri var. pitcheri | CLPIP | Ranunculaceae | Dicot |
| bluebunch wheatgrass | Pseudoroegneria spicata | PSSP6 | Poaceae | Monocot |
| bluecurls | Trichostema | TRICH9 | Lamiaceae | Dicot |
| bluegrass | Poa | POA | Poaceae | Monocot |
| bluejacket | Tradescantia ohiensis | TROH | Commelinaceae | Monocot |
| bluejoint | Calamagrostis canadensis | CACA4 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis var. canadensis | CACAC10 | Poaceae | Monocot |
| bluestem | Andropogon | ANDRO2 | Poaceae | Monocot |
| bluet | Houstonia | HOUST | Rubiaceae | Dicot |
| blunt broom sedge | Carex tribuloides | CATR7 | Cyperaceae | Monocot |
| blunt broom sedge | Carex tribuloides var. tribuloides | CATRT2 | Cyperaceae | Monocot |
| blunt spikerush | Eleocharis obtusa | ELOB2 | Cyperaceae | Monocot |
| bluntleaf bedstraw | Galium obtusum | GAOB | Rubiaceae | Dicot |
| bluntleaf bedstraw | Galium obtusum ssp. obtusum | GAOBO | Rubiaceae | Dicot |
| 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. truncata | ROCUT | Brassicaceae | Dicot |
| bluntlobe cliff fern | Woodsia obtusa | WOOB2 | Dryopteridaceae | Fern |
| bluntlobe cliff fern | Woodsia obtusa ssp. obtusa | WOOBO | Dryopteridaceae | Fern |
| Bodin"s milkvetch | Astragalus bodinii | ASBO | Fabaceae | Dicot |
| bog white violet | Viola lanceolata | VILA4 | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. lanceolata | VILAL | Violaceae | Dicot |
| bog willowherb | Epilobium leptophyllum | EPLE2 | Onagraceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| bottlebrush sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| bottomland aster | Symphyotrichum ontarionis | SYON2 | Asteraceae | Dicot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| bouquet mudplantain | Heteranthera multiflora | HEMU5 | Pontederiaceae | Monocot |
| 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 |
| bractless blazingstar | Mentzelia nuda | MENU | Loasaceae | Dicot |
| bractless blazingstar | Mentzelia nuda var. nuda | MENUN | Loasaceae | Dicot |
| bractless blazingstar | Mentzelia nuda var. stricta | MENUS | Loasaceae | Dicot |
| branched centaury | Centaurium pulchellum | CEPU3 | Gentianaceae | Dicot |
| branched cinquefoil | Potentilla effusa | POEF | Rosaceae | Dicot |
| branched false goldenweed | Oonopsis multicaulis | OOMU | Asteraceae | Dicot |
| branched noseburn | Tragia ramosa | TRRA5 | Euphorbiaceae | Dicot |
| brasenia | Brasenia | BRASE | Cabombaceae | Dicot |
| Brazilian waterweed | Egeria densa | EGDE | Hydrocharitaceae | Monocot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristleleaf sedge | Carex eburnea | CAEB2 | Cyperaceae | Monocot |
| bristly buttercup | Ranunculus hispidus | RAHI | Ranunculaceae | Dicot |
| bristly buttercup | Ranunculus hispidus var. caricetorum | RAHIC | Ranunculaceae | Dicot |
| bristly buttercup | Ranunculus hispidus var. nitidus | RAHIN | Ranunculaceae | Dicot |
| bristly greenbrier | Smilax tamnoides | SMTA2 | Smilacaceae | Monocot |
| bristly locust | Robinia hispida | ROHI | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. hispida | ROHIH | Fabaceae | Dicot |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle pricklypear | Opuntia fragilis | OPFR | Cactaceae | Dicot |
| Britton"s skullcap | Scutellaria brittonii | SCBR3 | Lamiaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius | PEAN4 | Scrophulariaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius var. angustifolius | PEANA2 | Scrophulariaceae | Dicot |
| broadbeard beardtongue | Penstemon angustifolius var. caudatus | PEANC | Scrophulariaceae | Dicot |
| broadfruit bur-reed | Sparganium eurycarpum | SPEU | Sparganiaceae | Monocot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf cattail | Typha latifolia | TYLA | Typhaceae | Monocot |
| broadleaf enchanter"s nightshade | Circaea lutetiana | CILU | Onagraceae | Dicot |
| broadleaf enchanter"s nightshade | Circaea lutetiana ssp. canadensis | CILUC | Onagraceae | Dicot |
| broadleaf milkweed | Asclepias latifolia | ASLA4 | Asclepiadaceae | Dicot |
| broadleaf rosette grass | Dichanthelium latifolium | DILA8 | Poaceae | Monocot |
| broadleaved pepperweed | Lepidium latifolium | LELA2 | Brassicaceae | Dicot |
| brome | Bromus | BROMU | Poaceae | Monocot |
| brook cinquefoil | Potentilla rivalis | PORI3 | Rosaceae | Dicot |
| broom sedge | Carex scoparia | CASC11 | Cyperaceae | Monocot |
| broom sedge | Carex scoparia var. scoparia | CASCS | Cyperaceae | Monocot |
| broom snakeweed | Gutierrezia sarothrae | GUSA2 | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides | SESP3 | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides var. spartioides | SESPS2 | Asteraceae | Dicot |
| broomcorn millet | Panicum miliaceum ssp. miliaceum | PAMIM | Poaceae | Monocot |
| broomrape | Orobanche | OROBA | Orobanchaceae | Dicot |
| broomweed | Amphiachyris | AMPHI8 | Asteraceae | Dicot |
| brown flatsedge | Cyperus fuscus | CYFU3 | Cyperaceae | Monocot |
| brown mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| browneyed Susan | Rudbeckia triloba | RUTR2 | Asteraceae | Dicot |
| browneyed Susan | Rudbeckia triloba var. triloba | RUTRT | Asteraceae | Dicot |
| buckbean | Menyanthes | MENYA | Menyanthaceae | Dicot |
| buckbean | Menyanthes trifoliata | METR3 | Menyanthaceae | Dicot |
| buckeye | Aesculus | AESCU | Hippocastanaceae | Dicot |
| Buckley"s beardtongue | Penstemon buckleyi | PEBU | Scrophulariaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckwheat | Fagopyrum | FAGOP2 | Polygonaceae | Dicot |
| buckwheat | Fagopyrum esculentum | FAES2 | Polygonaceae | Dicot |
| buckwheat | Eriogonum | ERIOG | Polygonaceae | Dicot |
| buckwheat | Eriogonum ×nebraskense | ERNE6 | Polygonaceae | Dicot |
| buff fleabane | Erigeron ochroleucus | EROC | Asteraceae | Dicot |
| buffalo clover | Trifolium reflexum | TRRE2 | Fabaceae | Dicot |
| buffaloberry | Shepherdia | SHEPH | Elaeagnaceae | Dicot |
| buffalobur nightshade | Solanum rostratum | SORO | Solanaceae | Dicot |
| buffalograss | Bouteloua dactyloides | BODA2 | Poaceae | Monocot |
| buglossoides | Buglossoides | BUGLO | Boraginaceae | Dicot |
| bugseed | Corispermum | CORIS | Chenopodiaceae | Dicot |
| bulblet bladderfern | Cystopteris bulbifera | CYBU3 | Dryopteridaceae | Fern |
| bulblet-bearing water hemlock | Cicuta bulbifera | CIBU | Apiaceae | Dicot |
| bulbous bittercress | Cardamine bulbosa | CABU3 | Brassicaceae | Dicot |
| bulbous bluegrass | Poa bulbosa | POBU | Poaceae | Monocot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bulrush | Schoenoplectiella | SCHOE7 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus ×oblongus | SCOB10 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bundleflower | Desmanthus | DESMA | Fabaceae | Dicot |
| bur chervil | Anthriscus caucalis | ANCA14 | Apiaceae | Dicot |
| bur cucumber | Sicyos | SICYO | Cucurbitaceae | 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 |
| bur-reed sedge | Carex sparganioides | CASP3 | Cyperaceae | Monocot |
| burdock | Arctium | ARCTI | Asteraceae | Dicot |
| burhead | Echinodorus | ECHIN6 | Alismataceae | Monocot |
| burnet | Sanguisorba | SANGU2 | Rosaceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burningbush | Euonymus atropurpureus | EUAT5 | Celastraceae | Dicot |
| burnweed | Erechtites | ERECH | Asteraceae | Dicot |
| bush morning-glory | Ipomoea leptophylla | IPLE | Convolvulaceae | Dicot |
| Bush"s sedge | Carex bushii | CABU5 | Cyperaceae | Monocot |
| 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 |
| butomus | Butomus | BUTOM | Butomaceae | Monocot |
| buttecandle | Cryptantha celosioides | CRCE | Boraginaceae | Dicot |
| butter and eggs | Linaria vulgaris | LIVU2 | Scrophulariaceae | Dicot |
| buttercup | Ranunculus | RANUN | Ranunculaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa | ASTU | Asclepiadaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa ssp. interior | ASTUI | Asclepiadaceae | Dicot |
| butterweed | Packera glabella | PAGL17 | Asteraceae | Dicot |
| button eryngo | Eryngium yuccifolium | ERYU | Apiaceae | Dicot |
| button eryngo | Eryngium yuccifolium var. yuccifolium | ERYUY | Apiaceae | Dicot |
| buttonbush | Cephalanthus | CEPHA | Rubiaceae | Dicot |
| buttonbush dodder | Cuscuta cephalanthi | CUCE | Cuscutaceae | Dicot |
| Buxbaum"s sedge | Carex buxbaumii | CABU6 | Cyperaceae | Monocot |
| calamus | Acorus calamus | ACCA4 | Acoraceae | Monocot |
| calcareous cryptantha | Cryptantha thyrsiflora | CRTH | Boraginaceae | Dicot |
| calico aster | Symphyotrichum lateriflorum | SYLA4 | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. lateriflorum | SYLAL7 | Asteraceae | Dicot |
| California amaranth | Amaranthus californicus | AMCA | Amaranthaceae | Dicot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| California poppy | Eschscholzia | ESCHS | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica | ESCA2 | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica ssp. californica | ESCAC | Papaveraceae | Dicot |
| camphorweed | Heterotheca subaxillaris | HESU3 | Asteraceae | Dicot |
| campsis | Campsis | CAMPS | Bignoniaceae | Dicot |
| Canada bluegrass | Poa compressa | POCO | Poaceae | Monocot |
| Canada cocklebur | Xanthium strumarium var. canadense | XASTC | Asteraceae | Dicot |
| Canada germander | Teucrium canadense | TECA3 | Lamiaceae | Dicot |
| Canada germander | Teucrium canadense var. canadense | TECAC | Lamiaceae | Dicot |
| Canada goldenrod | Solidago altissima | SOAL6 | Asteraceae | Dicot |
| Canada goldenrod | Solidago canadensis | SOCA6 | Asteraceae | Dicot |
| Canada lettuce | Lactuca canadensis | LACA | Asteraceae | Dicot |
| Canada lily | Lilium canadense | LICA3 | Liliaceae | Monocot |
| Canada lily | Lilium canadense ssp. canadense | LICAC | Liliaceae | Monocot |
| 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 blacksnakeroot | Sanicula canadensis | SACA15 | Apiaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis var. canadensis | SACAC2 | Apiaceae | Dicot |
| Canadian clearweed | Pilea pumila | PIPU2 | Urticaceae | Dicot |
| Canadian clearweed | Pilea pumila var. pumila | PIPUP | Urticaceae | Dicot |
| Canadian gooseberry | Ribes oxyacanthoides | RIOX | Grossulariaceae | Dicot |
| Canadian gooseberry | Ribes oxyacanthoides ssp. oxyacanthoides | RIOXO | Grossulariaceae | Dicot |
| Canadian honewort | Cryptotaenia canadensis | CRCA9 | Apiaceae | Dicot |
| Canadian horseweed | Conyza canadensis | COCA5 | Asteraceae | Dicot |
| Canadian horseweed | Conyza canadensis var. canadensis | COCAC3 | Asteraceae | Dicot |
| Canadian lousewort | Pedicularis canadensis | PECA | Scrophulariaceae | Dicot |
| Canadian lousewort | Pedicularis canadensis ssp. canadensis | PECAC3 | Scrophulariaceae | 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 waterweed | Elodea canadensis | ELCA7 | Hydrocharitaceae | Monocot |
| Canadian white violet | Viola canadensis | VICA4 | Violaceae | Dicot |
| Canadian woodnettle | Laportea canadensis | LACA3 | Urticaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| Canby"s aster | Symphyotrichum foliaceum var. canbyi | SYFOC | Asteraceae | Dicot |
| candle anemone | Anemone cylindrica | ANCY | Ranunculaceae | Dicot |
| capsella | Capsella | CAPSE | Brassicaceae | Dicot |
| cardinalflower | Lobelia cardinalis | LOCA2 | Campanulaceae | Dicot |
| carelessweed | Amaranthus palmeri | AMPA | Amaranthaceae | Dicot |
| carelessweed | Cyclachaena | CYCLA4 | Asteraceae | Dicot |
| Carelessweed | Cyclachaena xanthiifolia | CYXA2 | Asteraceae | Dicot |
| Carolina anemone | Anemone caroliniana | ANCA9 | Ranunculaceae | Dicot |
| Carolina desert-chicory | Pyrrhopappus carolinianus | PYCA2 | Asteraceae | Dicot |
| Carolina draba | Draba reptans | DRRE2 | Brassicaceae | Dicot |
| Carolina foxtail | Alopecurus carolinianus | ALCA4 | Poaceae | Monocot |
| Carolina geranium | Geranium carolinianum | GECA5 | Geraniaceae | Dicot |
| Carolina geranium | Geranium carolinianum var. carolinianum | GECAC4 | Geraniaceae | Dicot |
| Carolina horsenettle | Solanum carolinense | SOCA3 | Solanaceae | Dicot |
| Carolina horsenettle | Solanum carolinense var. carolinense | SOCAC4 | Solanaceae | Dicot |
| Carolina larkspur | Delphinium carolinianum | DECA3 | Ranunculaceae | Dicot |
| Carolina larkspur | Delphinium carolinianum ssp. virescens | DECAV2 | Ranunculaceae | Dicot |
| Carolina mosquitofern | Azolla caroliniana | AZCA | Azollaceae | Fern |
| Carolina puccoon | Lithospermum caroliniense | LICA13 | Boraginaceae | Dicot |
| Carolina puccoon | Lithospermum caroliniense var. croceum | LICAC9 | Boraginaceae | Dicot |
| Carolina rose | Rosa carolina | ROCA4 | Rosaceae | Dicot |
| Carolina rose | Rosa carolina var. carolina | ROCAC | Rosaceae | Dicot |
| Carolina woollywhite | Hymenopappus scabiosaeus | HYSC | Asteraceae | Dicot |
| Carolina woollywhite | Hymenopappus scabiosaeus var. corymbosus | HYSCC | Asteraceae | Dicot |
| carpenter"s square | Scrophularia marilandica | SCMA2 | Scrophulariaceae | Dicot |
| carpet phlox | Phlox hoodii ssp. glabrata | PHHOG | Polemoniaceae | Dicot |
| carpetweed | Mollugo | MOLLU | Molluginaceae | Dicot |
| Carruth"s sagewort | Artemisia carruthii | ARCA14 | Asteraceae | Dicot |
| cat greenbrier | Smilax glauca | SMGL | Smilacaceae | Monocot |
| catalpa | Catalpa | CATAL | Bignoniaceae | 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 |
| Caucasian bluestem | Bothriochloa bladhii | BOBL | Poaceae | 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 |
| Chalk Hill hymenopappus | Hymenopappus tenuifolius | HYTE2 | Asteraceae | Dicot |
| chamomile | Anthemis | ANTHE | Asteraceae | Dicot |
| Chapman"s bluegrass | Poa chapmaniana | POCH2 | Poaceae | Monocot |
| 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 |
| chervil | Anthriscus | ANTHR | Apiaceae | Dicot |
| chervil | Chaerophyllum | CHAER | Apiaceae | Dicot |
| Chickasaw plum | Prunus angustifolia | PRAN3 | Rosaceae | Dicot |
| Chickasaw plum | Prunus angustifolia var. angustifolia | PRANA | Rosaceae | Dicot |
| chickenthief | Mentzelia oligosperma | MEOL | Loasaceae | Dicot |
| chickpea milkvetch | Astragalus cicer | ASCI4 | Fabaceae | Dicot |
| chicory | Cichorium | CICHO | Asteraceae | Dicot |
| chicory | Cichorium intybus | CIIN | Asteraceae | Dicot |
| chinchweed | Pectis | PECTI | Asteraceae | Dicot |
| Chinese catalpa | Catalpa ovata | CAOV5 | Bignoniaceae | Dicot |
| Chinese chives | Allium tuberosum | ALTU3 | Liliaceae | Monocot |
| chinkapin oak | Quercus muehlenbergii | QUMU | Fagaceae | Dicot |
| chokecherry | Prunus virginiana var. virginiana | PRVIV | Rosaceae | Dicot |
| chokecherry | Prunus virginiana | PRVI | Rosaceae | Dicot |
| chorispora | Chorispora | CHORI | Brassicaceae | Dicot |
| churchmouse threeawn | Aristida dichotoma | ARDI4 | Poaceae | Monocot |
| cinquefoil | Potentilla | POTEN | Rosaceae | Dicot |
| city goosefoot | Chenopodium urbicum | CHUR | 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 |
| clasping milkweed | Asclepias amplexicaulis | ASAM | Asclepiadaceae | Dicot |
| clasping pepperweed | Lepidium perfoliatum | LEPE2 | Brassicaceae | Dicot |
| clasping Venus" looking-glass | Triodanis perfoliata | TRPE4 | Campanulaceae | Dicot |
| Clayton"s sweetroot | Osmorhiza claytonii | OSCL | Apiaceae | Dicot |
| clearweed | Pilea | PILEA | Urticaceae | Dicot |
| cliff fern | Woodsia | WOODS | Dryopteridaceae | Fern |
| cliffbrake | Pellaea | PELLA | Pteridaceae | Fern |
| climbing false buckwheat | Polygonum scandens | POSC3 | Polygonaceae | Dicot |
| climbing false buckwheat | Polygonum scandens var. scandens | POSCS | Polygonaceae | Dicot |
| climbing nightshade | Solanum dulcamara | SODU | Solanaceae | Dicot |
| climbing nightshade | Solanum dulcamara var. dulcamara | SODUD | Solanaceae | Dicot |
| climbing rose | Rosa setigera | ROSE2 | Rosaceae | Dicot |
| climbing rose | Rosa setigera var. tomentosa | ROSET | Rosaceae | Dicot |
| cloaked bulrush | Scirpus pallidus | SCPA8 | Cyperaceae | Monocot |
| closed bottle gentian | Gentiana andrewsii | GEAN | Gentianaceae | Dicot |
| clover | Trifolium | TRIFO | Fabaceae | Dicot |
| clover dodder | Cuscuta epithymum | CUEP | Cuscutaceae | Dicot |
| cluster mallow | Malva verticillata | MAVE | Malvaceae | Dicot |
| clustered blacksnakeroot | Sanicula odorata | SAOD | Apiaceae | Dicot |
| clustered broomrape | Orobanche fasciculata | ORFA | Orobanchaceae | Dicot |
| clustered fescue | Festuca paradoxa | FEPA2 | Poaceae | Monocot |
| clustered field sedge | Carex praegracilis | CAPR5 | Cyperaceae | Monocot |
| cobaea beardtongue | Penstemon cobaea | PECO4 | Scrophulariaceae | Dicot |
| cocklebur | Xanthium | XANTH2 | Asteraceae | Dicot |
| cockspur grass | Echinochloa | ECHIN4 | Poaceae | Monocot |
| coffeetree | Gymnocladus | GYMNO2 | Fabaceae | Dicot |
| cohosh | Caulophyllum | CAULO | Berberidaceae | Dicot |
| Collins" rockcress | Arabis holboellii var. collinsii | ARHOC | Brassicaceae | Dicot |
| Colorado butterfly plant | Gaura neomexicana ssp. coloradensis | GANEC | Onagraceae | Dicot |
| Columbian watermeal | Wolffia columbiana | WOCO | Lemnaceae | Monocot |
| columbine | Aquilegia | AQUIL | Ranunculaceae | Dicot |
| common barberry | Berberis vulgaris | BEVU | Berberidaceae | Dicot |
| common barley | Hordeum vulgare | HOVU | Poaceae | Monocot |
| common bladderwort | Utricularia macrorhiza | UTMA | Lentibulariaceae | Dicot |
| common blue violet | Viola sororia | VISO | Violaceae | Dicot |
| common blue wood aster | Symphyotrichum cordifolium | SYCO4 | Asteraceae | Dicot |
| common boneset | Eupatorium perfoliatum | EUPE3 | Asteraceae | Dicot |
| common boneset | Eupatorium perfoliatum var. perfoliatum | EUPEP | Asteraceae | Dicot |
| common buckthorn | Rhamnus cathartica | RHCA3 | Rhamnaceae | Dicot |
| common buttonbush | Cephalanthus occidentalis | CEOC2 | Rubiaceae | Dicot |
| common chickweed | Stellaria media | STME2 | Caryophyllaceae | Dicot |
| common chickweed | Stellaria media ssp. media | STMEM | Caryophyllaceae | Dicot |
| common chickweed | Stellaria media ssp. pallida | STMEP | Caryophyllaceae | Dicot |
| common cinquefoil | Potentilla simplex | POSI2 | Rosaceae | 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. officinale | TAOFO | Asteraceae | 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 goldstar | Hypoxis hirsuta | HYHI2 | Liliaceae | Monocot |
| 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 hop | Humulus lupulus var. pubescens | HULUP | Cannabaceae | Dicot |
| common hoptree | Ptelea trifoliata | PTTR | Rutaceae | Dicot |
| common hoptree | Ptelea trifoliata ssp. trifoliata | PTTRT | Rutaceae | Dicot |
| common hoptree | Ptelea trifoliata ssp. trifoliata var. trifoliata | PTTRT2 | Rutaceae | 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 marshmallow | Althaea officinalis | ALOF2 | Malvaceae | Dicot |
| common milkweed | Asclepias syriaca | ASSY | Asclepiadaceae | Dicot |
| common moonseed | Menispermum canadense | MECA3 | Menispermaceae | Dicot |
| 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 ninebark | Physocarpus opulifolius | PHOP | Rosaceae | Dicot |
| common oat | Avena sativa | AVSA | Poaceae | Monocot |
| common pepperweed | Lepidium densiflorum | LEDE | Brassicaceae | Dicot |
| common periwinkle | Vinca minor | VIMI2 | Apocynaceae | Dicot |
| common persimmon | Diospyros virginiana | DIVI5 | Ebenaceae | Dicot |
| common plantain | Plantago major | PLMA2 | Plantaginaceae | Dicot |
| common pricklyash | Zanthoxylum americanum | ZAAM | Rutaceae | Dicot |
| common reed | Phragmites australis | PHAU7 | Poaceae | Monocot |
| common rivergrass | Scolochloa festucacea | SCFE | Poaceae | Monocot |
| common rush | Juncus effusus | JUEF | Juncaceae | Monocot |
| common selfheal | Prunella vulgaris | PRVU | Lamiaceae | Dicot |
| common serviceberry | Amelanchier arborea | AMAR3 | Rosaceae | Dicot |
| common serviceberry | Amelanchier arborea var. arborea | AMARA4 | Rosaceae | Dicot |
| common sheep sorrel | Rumex acetosella | RUAC3 | Polygonaceae | Dicot |
| common sneezeweed | Helenium autumnale | HEAU | Asteraceae | Dicot |
| common sneezeweed | Helenium autumnale var. autumnale | HEAUA | Asteraceae | Dicot |
| common snowberry | Symphoricarpos albus | SYAL | Caprifoliaceae | Dicot |
| common snowberry | Symphoricarpos albus var. albus | SYALA | 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 spikerush | Eleocharis palustris var. vigens | ELPAV | 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 threeseed mercury | Acalypha rhomboidea | ACRH | Euphorbiaceae | Dicot |
| common threesquare | Schoenoplectus pungens | SCPU10 | Cyperaceae | Monocot |
| common threesquare | Schoenoplectus pungens var. longispicatus | SCPUL4 | Cyperaceae | Monocot |
| common viper"s bugloss | Echium vulgare | ECVU | Boraginaceae | Dicot |
| common wheat | Triticum aestivum | TRAE | Poaceae | Monocot |
| common yarrow | Achillea millefolium | ACMI2 | Asteraceae | Dicot |
| common yellow oxalis | Oxalis stricta | OXST | Oxalidaceae | Dicot |
| compact dodder | Cuscuta compacta | CUCO2 | Cuscutaceae | Dicot |
| compact dodder | Cuscuta compacta var. compacta | CUCOC | Cuscutaceae | Dicot |
| compassplant | Silphium laciniatum | SILA3 | Asteraceae | Dicot |
| compassplant | Silphium laciniatum var. laciniatum | SILAL2 | Asteraceae | Dicot |
| composite dropseed | Sporobolus compositus | SPCO16 | Poaceae | Monocot |
| composite dropseed | Sporobolus compositus var. compositus | SPCOC2 | Poaceae | Monocot |
| coneflower | Rudbeckia | RUDBE | Asteraceae | Dicot |
| coon"s tail | Ceratophyllum demersum | CEDE4 | Ceratophyllaceae | Dicot |
| copper globemallow | Sphaeralcea angustifolia | SPAN3 | Malvaceae | Dicot |
| copperleaf | Acalypha | ACALY | Euphorbiaceae | Dicot |
| coralberry | Symphoricarpos orbiculatus | SYOR | Caprifoliaceae | Dicot |
| coralroot | Corallorhiza | CORAL5 | Orchidaceae | Monocot |
| cordgrass | Spartina | SPART | Poaceae | Monocot |
| 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 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 |
| corncockle | Agrostemma | AGROS | Caryophyllaceae | Dicot |
| cosmopolitan bulrush | Schoenoplectus maritimus | SCMA8 | Cyperaceae | Monocot |
| cottonbatting plant | Pseudognaphalium stramineum | PSST7 | Asteraceae | Dicot |
| cottongrass | Eriophorum | ERIOP | Cyperaceae | Monocot |
| cottonrose | Logfia | LOGFI2 | Asteraceae | Dicot |
| cottonthistle | Onopordum | ONOPO | Asteraceae | Dicot |
| cottonwood | Populus ×smithii | POSM2 | Salicaceae | Dicot |
| cottonwood | Populus | POPUL | Salicaceae | Dicot |
| cow soapwort | Vaccaria hispanica | VAHI2 | Caryophyllaceae | Dicot |
| cowparsnip | Heracleum | HERAC | Apiaceae | Dicot |
| crabgrass | Digitaria | DIGIT2 | Poaceae | Monocot |
| crack willow | Salix fragilis | SAFR | Salicaceae | Dicot |
| cracked lichen | Acarospora | ACARO2 | Acarosporaceae | Lichen |
| Crawe"s sedge | Carex crawei | CACR3 | Cyperaceae | Monocot |
| 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 jenny | Lysimachia nummularia | LYNU | Primulaceae | Dicot |
| creeping juniper | Juniperus horizontalis | JUHO2 | Cupressaceae | Gymnosperm |
| creeping lovegrass | Neeragrostis | NEERA2 | Poaceae | Monocot |
| creeping lovegrass | Neeragrostis reptans | NERE3 | Poaceae | Monocot |
| creeping meadow foxtail | Alopecurus arundinaceus | ALAR | Poaceae | Monocot |
| creeping nailwort | Paronychia sessiliflora | PASE | Caryophyllaceae | Dicot |
| creeping yellowcress | Rorippa sylvestris | ROSY | Brassicaceae | Dicot |
| creepingroot violet | Viola canadensis var. rugulosa | VICAR | Violaceae | Dicot |
| crested arrowhead | Sagittaria cristata | SACR4 | Alismataceae | Monocot |
| crested pricklypoppy | Argemone polyanthemos | ARPO2 | Papaveraceae | Dicot |
| crested sedge | Carex cristatella | CACR7 | Cyperaceae | Monocot |
| 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 |
| crossflower | Chorispora tenella | CHTE2 | Brassicaceae | Dicot |
| croton | Croton | CROTO | Euphorbiaceae | Dicot |
| crownbeard | Verbesina | VERBE2 | Asteraceae | Dicot |
| crowned beggarticks | Bidens coronata | BICO | Asteraceae | Dicot |
| crowngrass | Paspalum | PASPA2 | Poaceae | Monocot |
| crownleaf evening primrose | Oenothera coronopifolia | OECO2 | Onagraceae | Dicot |
| crownvetch | Securigera | SECUR3 | Fabaceae | Dicot |
| crownvetch | Securigera varia | SEVA4 | Fabaceae | Dicot |
| crowpoison | Nothoscordum bivalve | NOBI2 | Liliaceae | Monocot |
| cryptantha | Cryptantha | CRYPT | Boraginaceae | Dicot |
| cudweed | Gnaphalium | GNAPH | Asteraceae | Dicot |
| cudweed | Pseudognaphalium | PSEUD43 | Asteraceae | Dicot |
| cultivated garlic | Allium sativum | ALSA2 | Liliaceae | Monocot |
| cultivated radish | Raphanus sativus | RASA2 | Brassicaceae | Dicot |
| Culver"s root | Veronicastrum virginicum | VEVI4 | Scrophulariaceae | Dicot |
| Cuman ragweed | Ambrosia psilostachya | AMPS | Asteraceae | Dicot |
| cup lichen | Cladonia | CLADO3 | Cladoniaceae | Lichen |
| cup plant | Silphium perfoliatum | SIPE2 | Asteraceae | Dicot |
| cup plant | Silphium perfoliatum var. perfoliatum | SIPEP | Asteraceae | Dicot |
| cupgrass | Eriochloa | ERIOC2 | Poaceae | Monocot |
| curly dock | Rumex crispus | RUCR | Polygonaceae | Dicot |
| curly dock | Rumex crispus ssp. crispus | RUCRC | Polygonaceae | Dicot |
| curly pondweed | Potamogeton crispus | POCR3 | Potamogetonaceae | Monocot |
| curly threeawn | Aristida desmantha | ARDE3 | Poaceae | Monocot |
| curlycup gumweed | Grindelia squarrosa | GRSQ | Asteraceae | Dicot |
| curlycup gumweed | Grindelia squarrosa var. quasiperennis | GRSQQ | Asteraceae | Dicot |
| curlycup gumweed | Grindelia squarrosa var. serrulata | GRSQS | Asteraceae | Dicot |
| curlycup gumweed | Grindelia squarrosa var. squarrosa | GRSQS2 | Asteraceae | Dicot |
| curlytop knotweed | Polygonum lapathifolium | POLA4 | Polygonaceae | Dicot |
| currant | Ribes | RIBES | Grossulariaceae | Dicot |
| cursed buttercup | Ranunculus sceleratus | RASC3 | Ranunculaceae | Dicot |
| cursed buttercup | Ranunculus sceleratus var. multifidus | RASCM | Ranunculaceae | Dicot |
| cursed buttercup | Ranunculus sceleratus var. sceleratus | RASCS | Ranunculaceae | Dicot |
| Curtis" threeawn | Aristida dichotoma var. curtissii | ARDIC | Poaceae | Monocot |
| curvepod fumewort | Corydalis curvisiliqua | COCU2 | Fumariaceae | Dicot |
| curvepod fumewort | Corydalis curvisiliqua ssp. occidentalis | COCUO | Fumariaceae | Dicot |
| curveseed butterwort | Ceratocephala | CERAT3 | Ranunculaceae | Dicot |
| curveseed butterwort | Ceratocephala testiculata | CETE5 | Ranunculaceae | Dicot |
| cusp dodder | Cuscuta cuspidata | CUCU2 | Cuscutaceae | Dicot |
| cutgrass | Leersia | LEERS | Poaceae | Monocot |
| cutleaf anemone | Pulsatilla patens ssp. multifida | PUPAM | Ranunculaceae | Dicot |
| cutleaf coneflower | Rudbeckia laciniata | RULA3 | Asteraceae | Dicot |
| cutleaf coneflower | Rudbeckia laciniata var. laciniata | RULAL | Asteraceae | Dicot |
| cutleaf cyclanthera | Cyclanthera dissecta | CYDI | Cucurbitaceae | Dicot |
| cutleaf evening primrose | Oenothera laciniata | OELA | Onagraceae | Dicot |
| cutleaf nightshade | Solanum triflorum | SOTR | Solanaceae | Dicot |
| cutleaf teasel | Dipsacus laciniatus | DILA4 | Dipsacaceae | Dicot |
| cutleaf toothwort | Cardamine concatenata | CACO26 | Brassicaceae | Dicot |
| cutleaf vipergrass | Scorzonera laciniata | SCLA6 | Asteraceae | Dicot |
| cutleaf watermilfoil | Myriophyllum pinnatum | MYPI | Haloragaceae | Dicot |
| cutleaf waterparsnip | Berula erecta | BEER | Apiaceae | Dicot |
| cyclanthera | Cyclanthera | CYCLA2 | Cucurbitaceae | Dicot |
| cycloloma | Cycloloma | CYCLO | Chenopodiaceae | Dicot |
| cymbalaria | Cymbalaria | CYMBA | Scrophulariaceae | Dicot |
| cypress spurge | Euphorbia cyparissias | EUCY2 | Euphorbiaceae | Dicot |
| Dahurian buckthorn | Rhamnus davurica | RHDA | Rhamnaceae | Dicot |
| Dahurian buckthorn | Rhamnus davurica ssp. davurica | RHDAD2 | Rhamnaceae | Dicot |
| daisy | Leucanthemum | LEUCA4 | Asteraceae | Dicot |
| Dakota gentian | Gentiana andrewsii var. dakotica | GEAND | Gentianaceae | Dicot |
| Dakota mock vervain | Glandularia bipinnatifida | GLBI2 | Verbenaceae | Dicot |
| Dakota mock vervain | Glandularia bipinnatifida var. bipinnatifida | GLBIB | Verbenaceae | Dicot |
| Dalmatian toadflax | Linaria dalmatica | LIDA | Scrophulariaceae | Dicot |
| Dalmatian toadflax | Linaria dalmatica ssp. dalmatica | LIDAD | Scrophulariaceae | Dicot |
| dames rocket | Hesperis matronalis | HEMA3 | Brassicaceae | Dicot |
| dandelion | Taraxacum | TARAX | Asteraceae | Dicot |
| darkthroat shootingstar | Dodecatheon pulchellum | DOPU | Primulaceae | Dicot |
| darkthroat shootingstar | Dodecatheon pulchellum ssp. pulchellum | DOPUP2 | Primulaceae | Dicot |
| dasistoma | Dasistoma | DASIS | Scrophulariaceae | Dicot |
| David"s spurge | Euphorbia davidii | EUDA5 | Euphorbiaceae | Dicot |
| Davis" sedge | Carex davisii | CADA | Cyperaceae | Monocot |
| dayflower | Commelina | COMME | Commelinaceae | Monocot |
| daylily | Hemerocallis | HEMER | Liliaceae | Monocot |
| deadly nightshade | Solanum interius | SOIN2 | Solanaceae | Dicot |
| deadnettle | Lamium | LAMIU | Lamiaceae | Dicot |
| deathcamas | Zigadenus | ZIGAD | Liliaceae | Monocot |
| deer sedge | Carex hallii | CAHA3 | Cyperaceae | Monocot |
| dense bladderpod | Lesquerella condensata | LECO2 | Brassicaceae | Dicot |
| densespike blazing star | Liatris densispicata | LIDE4 | Asteraceae | Dicot |
| densespike blazing star | Liatris densispicata var. interrupta | LIDEI | Asteraceae | Dicot |
| densetuft hairsedge | Bulbostylis capillaris | BUCA2 | Cyperaceae | Monocot |
| densetuft hairsedge | Bulbostylis capillaris ssp. capillaris | BUCAC | Cyperaceae | Monocot |
| Deptford pink | Dianthus armeria | DIAR | Caryophyllaceae | Dicot |
| desert biscuitroot | Lomatium foeniculaceum | LOFO | Apiaceae | Dicot |
| desert biscuitroot | Lomatium foeniculaceum ssp. daucifolium | LOFOD | Apiaceae | Dicot |
| desert biscuitroot | Lomatium foeniculaceum ssp. foeniculaceum | LOFOF2 | Apiaceae | Dicot |
| desert centaury | Centaurium exaltatum | CEEX | Gentianaceae | Dicot |
| desert goosefoot | Chenopodium pratericola | CHPR5 | Chenopodiaceae | Dicot |
| desert madwort | Alyssum desertorum | ALDE | Brassicaceae | Dicot |
| desert madwort | Alyssum desertorum var. desertorum | ALDED | Brassicaceae | Dicot |
| desert princesplume | Stanleya pinnata | STPI | Brassicaceae | Dicot |
| desert princesplume | Stanleya pinnata var. pinnata | STPIP | Brassicaceae | Dicot |
| desert wirelettuce | Stephanomeria runcinata | STRU3 | Asteraceae | Dicot |
| desert-chicory | Pyrrhopappus | PYRRH | Asteraceae | Dicot |
| desert-thorn | Lycium | LYCIU | Solanaceae | Dicot |
| desertparsley | Lomatium | LOMAT | Apiaceae | Dicot |
| devil"s beggartick | Bidens frondosa | BIFR | Asteraceae | Dicot |
| devil"s darning needles | Clematis virginiana | CLVI5 | Ranunculaceae | Dicot |
| devil"s-tongue | Opuntia humifusa | OPHU | Cactaceae | Dicot |
| diamond-flowers | Stenaria | STENA3 | Rubiaceae | Dicot |
| diamond-flowers | Stenaria nigricans | STNI6 | Rubiaceae | Dicot |
| diamondflowers | Stenaria nigricans var. nigricans | STNIN | Rubiaceae | Dicot |
| diffuse knapweed | Centaurea diffusa | CEDI3 | Asteraceae | Dicot |
| dill | Anethum | ANETH | Apiaceae | Dicot |
| dill | Anethum graveolens | ANGR2 | Apiaceae | Dicot |
| diospyros | Diospyros | DIOSP | Ebenaceae | Dicot |
| disc mayweed | Matricaria discoidea | MADI6 | Asteraceae | Dicot |
| disk waterhyssop | Bacopa rotundifolia | BARO | Scrophulariaceae | Dicot |
| distaff thistle | Carthamus | CARTH | Asteraceae | Dicot |
| ditch rabbitsfoot grass | Polypogon interruptus | POIN7 | Poaceae | Monocot |
| ditch stonecrop | Penthorum sedoides | PESE6 | Crassulaceae | Dicot |
| dock | Rumex | RUMEX | Polygonaceae | Dicot |
| dodder | Cuscuta | CUSCU | Cuscutaceae | Dicot |
| dogbane | Apocynum | APOCY | Apocynaceae | Dicot |
| dogwood | Cornus | CORNU | Cornaceae | Dicot |
| doll"s daisy | Boltonia | BOLTO | Asteraceae | Dicot |
| dotted blazing star | Liatris punctata | LIPU | Asteraceae | Dicot |
| dotted blazing star | Liatris punctata var. punctata | LIPUP | Asteraceae | Dicot |
| dotted lichen | Bacidia | BACID | Bacidiaceae | Lichen |
| dotted smartweed | Polygonum punctatum | POPU5 | Polygonaceae | Dicot |
| dotted smartweed | Polygonum punctatum var. confertiflorum | POPUC2 | Polygonaceae | Dicot |
| dotted smartweed | Polygonum punctatum var. punctatum | POPUP4 | Polygonaceae | Dicot |
| double twinpod | Physaria brassicoides | PHBR5 | Brassicaceae | Dicot |
| doubtful knight"s-spur | Consolida ajacis | COAJ | Ranunculaceae | Dicot |
| Douglas" knotweed | Polygonum douglasii | PODO4 | Polygonaceae | Dicot |
| Douglas" knotweed | Polygonum douglasii ssp. douglasii | PODOD4 | Polygonaceae | Dicot |
| Douglas" sedge | Carex douglasii | CADO2 | Cyperaceae | Monocot |
| downy gentian | Gentiana puberulenta | GEPU5 | Gentianaceae | Dicot |
| downy hawthorn | Crataegus mollis | CRMO2 | Rosaceae | Dicot |
| downy paintedcup | Castilleja sessiliflora | CASE5 | Scrophulariaceae | Dicot |
| downy phlox | Phlox pilosa | PHPI | Polemoniaceae | Dicot |
| downy phlox | Phlox pilosa ssp. fulgida | PHPIF2 | Polemoniaceae | Dicot |
| downy ragged goldenrod | Solidago petiolaris | SOPE | Asteraceae | Dicot |
| downy ragged goldenrod | Solidago petiolaris var. angusta | SOPEA | Asteraceae | Dicot |
| downy yellow violet | Viola pubescens | VIPU3 | Violaceae | Dicot |
| downy yellow violet | Viola pubescens var. pubescens | VIPUP2 | Violaceae | Dicot |
| draba | Draba | DRABA | Brassicaceae | Dicot |
| dragonhead | Dracocephalum | DRACO | Lamiaceae | Dicot |
| dropseed | Sporobolus | SPORO | Poaceae | Monocot |
| drug fumitory | Fumaria officinalis | FUOF | Fumariaceae | Dicot |
| drug fumitory | Fumaria officinalis ssp. wirtgenii | FUOFW | Fumariaceae | Dicot |
| Drummond"s aster | Symphyotrichum drummondii | SYDR | Asteraceae | Dicot |
| Drummond"s aster | Symphyotrichum drummondii var. drummondii | SYDRD | Asteraceae | Dicot |
| Drummond"s campion | Silene drummondii | SIDR | Caryophyllaceae | Dicot |
| Drummond"s campion | Silene drummondii var. drummondii | SIDRD | Caryophyllaceae | Dicot |
| Drummond"s false pennyroyal | Hedeoma drummondii | HEDR | Lamiaceae | Dicot |
| Drummond"s halfchaff sedge | Lipocarpha drummondii | LIDR3 | Cyperaceae | Monocot |
| Drummond"s milkvetch | Astragalus drummondii | ASDR3 | Fabaceae | Dicot |
| Drummond"s onion | Allium drummondii | ALDR | Liliaceae | Monocot |
| Drummond"s rockcress | Arabis drummondii | ARDR | Brassicaceae | Dicot |
| duchesnea | Duchesnea | DUCHE | Rosaceae | Dicot |
| duckmeat | Spirodela | SPIRO | Lemnaceae | Monocot |
| duckweed | Lemna | LEMNA | Lemnaceae | Monocot |
| Dudley"s rush | Juncus dudleyi | JUDU2 | Juncaceae | Monocot |
| dulichium | Dulichium | DULIC | Cyperaceae | Monocot |
| dutchman"s breeches | Dicentra cucullaria | DICU | Fumariaceae | Dicot |
| dwarf chinkapin oak | Quercus prinoides | QUPR | Fagaceae | Dicot |
| dwarf false indigo | Amorpha nana | AMNA | Fabaceae | Dicot |
| dwarf groundcherry | Physalis pumila | PHPU8 | Solanaceae | Dicot |
| dwarf horseweed | Conyza ramosissima | CORA4 | Asteraceae | Dicot |
| dwarf larkspur | Delphinium tricorne | DETR | Ranunculaceae | Dicot |
| dwarf morning-glory | Evolvulus | EVOLV | Convolvulaceae | Dicot |
| dwarf red blackberry | Rubus pubescens | RUPU | Rosaceae | Dicot |
| dwarf red blackberry | Rubus pubescens var. pubescens | RUPUP2 | Rosaceae | Dicot |
| dwarf snapdragon | Chaenorhinum | CHAEN7 | Scrophulariaceae | Dicot |
| dwarf snapdragon | Chaenorhinum minus | CHMI | Scrophulariaceae | Dicot |
| dwarf St. Johnswort | Hypericum mutilum | HYMU | Clusiaceae | Dicot |
| dwarfdandelion | Krigia | KRIGI | Asteraceae | Dicot |
| dysphania | Dysphania | DYSPH | Chenopodiaceae | Dicot |
| dyssodia | Dyssodia | DYSSO | Asteraceae | Dicot |
| eared redstem | Ammannia auriculata | AMAU2 | Lythraceae | Dicot |
| early bluetop fleabane | Erigeron vetensis | ERVE2 | Asteraceae | Dicot |
| early buttercup | Ranunculus fascicularis | RAFA | Ranunculaceae | Dicot |
| early meadow-rue | Thalictrum dioicum | THDI | Ranunculaceae | Dicot |
| early wildrye | Elymus macgregorii | ELMA | Poaceae | Monocot |
| earlyleaf brome | Bromus latiglumis | BRLA4 | Poaceae | Monocot |
| earthsmoke | Fumaria vaillantii | FUVA | Fumariaceae | Dicot |
| eastern bottlebrush grass | Elymus hystrix | ELHY | Poaceae | Monocot |
| eastern bottlebrush grass | Elymus hystrix var. bigeloviana | ELHYB | Poaceae | Monocot |
| eastern bottlebrush grass | Elymus hystrix var. hystrix | ELHYH | Poaceae | Monocot |
| eastern cottonwood | Populus deltoides | PODE3 | Salicaceae | Dicot |
| eastern daisy fleabane | Erigeron annuus | ERAN | Asteraceae | Dicot |
| eastern gamagrass | Tripsacum dactyloides | TRDA3 | Poaceae | Monocot |
| eastern hemlockparsley | Conioselinum chinense | COCH2 | Apiaceae | Dicot |
| eastern marsh fern | Thelypteris palustris | THPA | Thelypteridaceae | Fern |
| eastern marsh fern | Thelypteris palustris var. pubescens | THPAP | Thelypteridaceae | Fern |
| eastern pasqueflower | Pulsatilla patens | PUPA5 | Ranunculaceae | Dicot |
| eastern poison ivy | Toxicodendron radicans | TORA2 | Anacardiaceae | Dicot |
| eastern poison ivy | Toxicodendron radicans ssp. negundo | TORAN | Anacardiaceae | Dicot |
| eastern redbud | Cercis canadensis | CECA4 | Fabaceae | Dicot |
| eastern redbud | Cercis canadensis var. canadensis | CECAC | Fabaceae | Dicot |
| eastern redcedar | Juniperus virginiana | JUVI | Cupressaceae | Gymnosperm |
| eastern redcedar | Juniperus virginiana var. virginiana | JUVIV | Cupressaceae | Gymnosperm |
| eastern star sedge | Carex radiata | CARA8 | Cyperaceae | Monocot |
| eastern wahoo | Euonymus atropurpureus var. atropurpureus | EUATA2 | Celastraceae | Dicot |
| eastern waterleaf | Hydrophyllum virginianum | HYVI | Hydrophyllaceae | Dicot |
| eastern waterleaf | Hydrophyllum virginianum var. virginianum | HYVIV | Hydrophyllaceae | Dicot |
| eastern woodland sedge | Carex blanda | CABL | Cyperaceae | Monocot |
| ebony spleenwort | Asplenium platyneuron | ASPL | Aspleniaceae | Fern |
| ebony spleenwort | Asplenium platyneuron var. platyneuron | ASPLP | Aspleniaceae | Fern |
| echinocystis | Echinocystis | ECHIN5 | Cucurbitaceae | Dicot |
| eclipta | Eclipta | ECLIP | Asteraceae | Dicot |
| egeria | Egeria | EGERI | Hydrocharitaceae | Monocot |
| elderberry | Sambucus | SAMBU | Caprifoliaceae | Dicot |
| elliptical buttercup | Ranunculus glaberrimus var. ellipticus | RAGLE | Ranunculaceae | Dicot |
| ellisia | Ellisia | ELLIS | Hydrophyllaceae | Dicot |
| elm | Ulmus | ULMUS | Ulmaceae | Dicot |
| elmleaf goldenrod | Solidago ulmifolia | SOUL2 | Asteraceae | Dicot |
| elmleaf goldenrod | Solidago ulmifolia var. ulmifolia | SOULU2 | Asteraceae | Dicot |
| Emory"s sedge | Carex emoryi | CAEM2 | Cyperaceae | Monocot |
| enchanter"s nightshade | Circaea | CIRCA | Onagraceae | Dicot |
| endolepis | Endolepis | ENDOL | Chenopodiaceae | Dicot |
| Engelmann"s daisy | Engelmannia | ENGEL | Asteraceae | Dicot |
| Engelmann"s daisy | Engelmannia peristenia | ENPE4 | Asteraceae | Dicot |
| Engelmann"s milkweed | Asclepias engelmanniana | ASEN | Asclepiadaceae | Dicot |
| Engelmann"s spikerush | Eleocharis engelmannii | ELEN | Cyperaceae | Monocot |
| entireleaved thelypody | Thelypodium integrifolium | THIN | Brassicaceae | Dicot |
| entireleaved thelypody | Thelypodium integrifolium ssp. integrifolium | THINI | Brassicaceae | Dicot |
| erect knotweed | Polygonum erectum | POER2 | Polygonaceae | Dicot |
| eryngo | Eryngium | ERYNG | Apiaceae | Dicot |
| Eurasian watermilfoil | Myriophyllum spicatum | MYSP2 | Haloragaceae | Dicot |
| European bur-reed | Sparganium emersum | SPEM2 | Sparganiaceae | Monocot |
| European chickweed | Cerastium pumilum | CEPU4 | Caryophyllaceae | Dicot |
| European common reed | Phragmites australis ssp. australis | PHAUA7 | Poaceae | Monocot |
| European cranberrybush | Viburnum opulus | VIOP | Caprifoliaceae | Dicot |
| European field pansy | Viola arvensis | VIAR | Violaceae | Dicot |
| European privet | Ligustrum vulgare | LIVU | Oleaceae | Dicot |
| European stickseed | Lappula squarrosa | LASQ | Boraginaceae | Dicot |
| evening primrose | Oenothera | OENOT | Onagraceae | Dicot |
| eyebane | Chamaesyce nutans | CHNU9 | Euphorbiaceae | Dicot |
| fairybells | Prosartes | PROSA | Liliaceae | Monocot |
| falcaria | Falcaria | FALCA | Apiaceae | Dicot |
| fall panicgrass | Panicum dichotomiflorum | PADI | Poaceae | Monocot |
| fall panicgrass | Panicum dichotomiflorum var. dichotomiflorum | PADID | Poaceae | Monocot |
| fall phlox | Phlox paniculata | PHPA9 | Polemoniaceae | Dicot |
| fall rosette grass | Dichanthelium wilcoxianum | DIWI5 | Poaceae | Monocot |
| fall witchgrass | Digitaria cognata | DICO6 | Poaceae | Monocot |
| false bindweed | Calystegia | CALYS | Convolvulaceae | Dicot |
| false boneset | Brickellia eupatorioides | BREU | Asteraceae | Dicot |
| false boneset | Brickellia eupatorioides var. corymbulosa | BREUC | Asteraceae | Dicot |
| false buffalograss | Munroa | MUNRO3 | Poaceae | Monocot |
| false buffalograss | Munroa squarrosa | MUSQ3 | Poaceae | Monocot |
| false cloak fern | Argyrochosma | ARGYR5 | Pteridaceae | Fern |
| false daisy | Eclipta prostrata | ECPR | Asteraceae | Dicot |
| false dandelion | Nothocalais | NOTHO5 | Asteraceae | Dicot |
| false flax | Camelina | CAMEL | Brassicaceae | Dicot |
| false foxglove | Agalinis | AGALI | Scrophulariaceae | Dicot |
| false garlic | Nothoscordum | NOTHO2 | Liliaceae | Monocot |
| false gaura | Stenosiphon linifolius | STLI2 | Onagraceae | Dicot |
| false goldenaster | Heterotheca | HETER8 | Asteraceae | Dicot |
| false goldenweed | Oonopsis | OONOP | Asteraceae | Dicot |
| false indigo | Amorpha | AMORP | Fabaceae | Dicot |
| false indigo bush | Amorpha fruticosa | AMFR | Fabaceae | Dicot |
| false madwort | Berteroa | BERTE | Brassicaceae | Dicot |
| false melic | Schizachne | SCHIZ | Poaceae | Monocot |
| false melic | Schizachne purpurascens | SCPU | Poaceae | Monocot |
| false nettle | Boehmeria | BOEHM | Urticaceae | Dicot |
| false pennyroyal | Hedeoma | HEDEO | Lamiaceae | Dicot |
| false pimpernel | Lindernia | LINDE | Scrophulariaceae | Dicot |
| false wheatgrass | Eremopyrum | EREMO5 | Poaceae | Monocot |
| falsegold groundsel | Packera pseudaurea | PAPS5 | Asteraceae | Dicot |
| falsegold groundsel | Packera pseudaurea var. semicordata | PAPSS | Asteraceae | Dicot |
| fanpetals | Sida | SIDA | Malvaceae | Dicot |
| fawnlily | Erythronium | ERYTH3 | Liliaceae | Monocot |
| feather fingergrass | Chloris virgata | CHVI4 | Poaceae | Monocot |
| feathery false lily of the valley | Maianthemum racemosum | MARA7 | Liliaceae | Monocot |
| feathery false lily of the valley | Maianthemum racemosum ssp. racemosum | MARAR | Liliaceae | Monocot |
| Fendler threeawn | Aristida purpurea var. longiseta | ARPUL | Poaceae | Monocot |
| Fendler"s aster | Symphyotrichum fendleri | SYFE | Asteraceae | Dicot |
| Fendler"s sandmat | Chamaesyce fendleri | CHFE3 | Euphorbiaceae | Dicot |
| Fendler"s threeawn | Aristida purpurea var. fendleriana | ARPUF | Poaceae | Monocot |
| fennel | Foeniculum | FOENI | Apiaceae | Dicot |
| Fernald"s yellowcress | Rorippa palustris ssp. fernaldiana | ROPAF2 | Brassicaceae | Dicot |
| fescue | Schedonorus | SCHED2 | Poaceae | Monocot |
| fescue | Vulpia | VULPI | Poaceae | Monocot |
| fescue | Festuca | FESTU | Poaceae | Monocot |
| fetid marigold | Dyssodia papposa | DYPA | Asteraceae | Dicot |
| feverwort | Triosteum perfoliatum | TRPE5 | Caprifoliaceae | Dicot |
| fewflower buckwheat | Eriogonum pauciflorum | ERPA9 | Polygonaceae | Dicot |
| fewflower buckwheat | Eriogonum pauciflorum var. gnaphalodes | ERPAG | Polygonaceae | Dicot |
| fewflower buckwheat | Eriogonum pauciflorum var. pauciflorum | ERPAP6 | Polygonaceae | Dicot |
| fewflower spikerush | Eleocharis quinqueflora | ELQU2 | Cyperaceae | Monocot |
| fiddleleaf hawksbeard | Crepis runcinata | CRRU3 | Asteraceae | Dicot |
| fiddleleaf hawksbeard | Crepis runcinata ssp. runcinata | CRRUR | Asteraceae | Dicot |
| fiddleneck | Amsinckia | AMSIN | Boraginaceae | Dicot |
| field bindweed | Convolvulus arvensis | COAR4 | Convolvulaceae | Dicot |
| field brome | Bromus arvensis | BRAR5 | Poaceae | Monocot |
| field chickweed | Cerastium arvense | CEAR4 | Caryophyllaceae | Dicot |
| field chickweed | Cerastium arvense ssp. strictum | CEARS2 | Caryophyllaceae | Dicot |
| field clover | Trifolium campestre | TRCA5 | Fabaceae | Dicot |
| field cottonrose | Logfia arvensis | LOAR5 | Asteraceae | Dicot |
| field horsetail | Equisetum arvense | EQAR | Equisetaceae | Horsetail |
| field horsetail | Equisetum ×ferrissii | EQFE | Equisetaceae | Horsetail |
| field mustard | Brassica rapa | BRRA | Brassicaceae | Dicot |
| field mustard | Brassica rapa var. rapa | BRRAR | Brassicaceae | Dicot |
| field pansy | Viola bicolor | VIBI | Violaceae | Dicot |
| field pennycress | Thlaspi arvense | THAR5 | Brassicaceae | Dicot |
| field pepperweed | Lepidium campestre | LECA5 | Brassicaceae | Dicot |
| field pussytoes | Antennaria neglecta | ANNE | Asteraceae | Dicot |
| field sagewort | Artemisia campestris | ARCA12 | Asteraceae | Dicot |
| field sagewort | Artemisia campestris ssp. borealis | ARCAB2 | Asteraceae | Dicot |
| field sagewort | Artemisia campestris ssp. borealis var. scouleriana | ARCAS5 | Asteraceae | Dicot |