List of Iowa Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| absinthium | Artemisia absinthium | ARAB3 | Asteraceae | Dicot |
| Adam and Eve | Aplectrum | APLEC | Orchidaceae | Monocot |
| Adam and Eve | Aplectrum hyemale | APHY | Orchidaceae | Monocot |
| adder"s-mouth orchid | Malaxis | MALAX | Orchidaceae | Monocot |
| adderstongue | Ophioglossum | OPHIO | Ophioglossaceae | Fern |
| Addison"s rosette grass | Dichanthelium ovale var. addisonii | DIOVA | Poaceae | Monocot |
| adlumia | Adlumia | ADLUM | Fumariaceae | Dicot |
| adoxa | Adoxa | ADOXA | Adoxaceae | Dicot |
| African dogstooth grass | Cynodon transvaalensis | CYTR | Poaceae | Monocot |
| agoseris | Agoseris | AGOSE | Asteraceae | Dicot |
| agrimony | Agrimonia | AGRIM | Rosaceae | Dicot |
| agueweed | Gentianella quinquefolia | GEQU2 | Gentianaceae | Dicot |
| agueweed | Gentianella quinquefolia ssp. occidentalis | GEQUO | Gentianaceae | Dicot |
| ailanthus | Ailanthus | AILAN | Simaroubaceae | Dicot |
| alder | Alnus | ALNUS | Betulaceae | Dicot |
| alderleaf buckthorn | Rhamnus alnifolia | RHAL | Rhamnaceae | Dicot |
| alfalfa | Medicago | MEDIC | Fabaceae | Dicot |
| alfalfa | Medicago sativa | MESA | Fabaceae | Dicot |
| alfalfa | Medicago sativa ssp. sativa | MESAS | Fabaceae | Dicot |
| alkali buttercup | Ranunculus cymbalaria | RACY | Ranunculaceae | Dicot |
| 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 |
| Allegheny serviceberry | Amelanchier laevis | AMLA | Rosaceae | Dicot |
| allegheny vine | Adlumia fungosa | ADFU | Fumariaceae | Dicot |
| alliaria | Alliaria | ALLIA | Brassicaceae | Dicot |
| alsike clover | Trifolium hybridum | TRHY | Fabaceae | Dicot |
| alternate-leaf golden saxifrage | Chrysosplenium alternifolium | CHAL24 | Saxifragaceae | Dicot |
| alternateleaf dogwood | Cornus alternifolia | COAL2 | Cornaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| amberboa | Amberboa | AMBER | Asteraceae | 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 basswood | Tilia americana var. heterophylla | TIAMH | 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 bur-reed | Sparganium americanum | SPAM | Sparganiaceae | Monocot |
| American burnweed | Erechtites hieraciifolia | ERHI2 | Asteraceae | Dicot |
| American burnweed | Erechtites hieraciifolia var. hieraciifolia | ERHIH | Asteraceae | Dicot |
| American cancer-root | Conopholis americana | COAM | Orobanchaceae | Dicot |
| American chestnut | Castanea dentata | CADE12 | Fagaceae | 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 eelgrass | Vallisneria americana | VAAM3 | Hydrocharitaceae | Monocot |
| American elm | Ulmus americana | ULAM | Ulmaceae | Dicot |
| American false pennyroyal | Hedeoma pulegioides | HEPU | Lamiaceae | Dicot |
| American fly honeysuckle | Lonicera canadensis | LOCA7 | Caprifoliaceae | Dicot |
| American ginseng | Panax quinquefolius | PAQU | Araliaceae | Dicot |
| American golden saxifrage | Chrysosplenium americanum | CHAM2 | Saxifragaceae | Dicot |
| American hazelnut | Corylus americana | COAM3 | Betulaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata | AMBR2 | Fabaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata var. bracteata | AMBRB | Fabaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata var. comosa | AMBRC | Fabaceae | Dicot |
| American hornbeam | Carpinus caroliniana | CACA18 | Betulaceae | Dicot |
| American hornbeam | Carpinus caroliniana ssp. virginiana | CACAV | Betulaceae | 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 milletgrass | Milium effusum | MIEF | Poaceae | Monocot |
| American milletgrass | Milium effusum var. cisatlanticum | MIEFC | Poaceae | Monocot |
| 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 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 star-thistle | Centaurea americana | CEAM2 | Asteraceae | Dicot |
| American stickseed | Hackelia deflexa var. americana | HADEA | Boraginaceae | Dicot |
| American stoneseed | Lithospermum latifolium | LILA2 | 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 water-willow | Justicia americana | JUAM | Acanthaceae | Dicot |
| 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 wisteria | Wisteria frutescens | WIFR | Fabaceae | Dicot |
| American witchhazel | Hamamelis virginiana | HAVI4 | Hamamelidaceae | Dicot |
| American woollyfruit sedge | Carex lasiocarpa var. americana | CALAA | Cyperaceae | Monocot |
| Amur honeysuckle | Lonicera maackii | LOMA6 | Caprifoliaceae | Dicot |
| Amur maple | Acer ginnala | ACGI | Aceraceae | Dicot |
| Amur peppervine | Ampelopsis brevipedunculata | AMBR7 | Vitaceae | Dicot |
| Amur rose | Rosa ×dulcissima | RODU | Rosaceae | Dicot |
| Amur silvergrass | Miscanthus sacchariflorus | MISA | Poaceae | Monocot |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| angelica | Angelica | ANGEL | Apiaceae | Dicot |
| annual bluegrass | Poa annua | POAN | Poaceae | Monocot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual fescue | Vulpia myuros | VUMY | Poaceae | Monocot |
| annual marsh elder | Iva annua | IVAN2 | Asteraceae | Dicot |
| annual marsh elder | Iva annua var. annua | IVANA | Asteraceae | Dicot |
| annual ragweed | Ambrosia artemisiifolia | AMAR2 | Asteraceae | Dicot |
| annual ragweed | Ambrosia artemisiifolia var. elatior | AMARE | Asteraceae | Dicot |
| annual vernalgrass | Anthoxanthum aristatum | ANAR7 | Poaceae | Monocot |
| annual wallrocket | Diplotaxis muralis | DIMU2 | Brassicaceae | Dicot |
| annual wildrice | Zizania aquatica | ZIAQ | Poaceae | Monocot |
| annual wildrice | Zizania aquatica var. aquatica | ZIAQA2 | Poaceae | Monocot |
| anoda | Anoda | ANODA | Malvaceae | Dicot |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apple of Peru | Nicandra physalodes | NIPH | Solanaceae | Dicot |
| arborvitae | Thuja | THUJA | Cupressaceae | Gymnosperm |
| arborvitae | Thuja occidentalis | THOC2 | Cupressaceae | Gymnosperm |
| arctic brome | Bromus kalmii | BRKA2 | Poaceae | Monocot |
| arctic rush | Juncus arcticus | JUAR2 | Juncaceae | Monocot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| aromatic aster | Symphyotrichum oblongifolium | SYOB | Asteraceae | Dicot |
| arrow arum | Peltandra | PELTA | Araceae | 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 |
| arrowleaf violet | Viola sagittata | VISA2 | Violaceae | Dicot |
| arrowleaf violet | Viola sagittata var. ovata | VISAO | Violaceae | Dicot |
| arrowleaf violet | Viola sagittata var. sagittata | VISAS5 | Violaceae | Dicot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| aruncus | Aruncus | ARUNC | Rosaceae | Dicot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| ashy sunflower | Helianthus mollis | HEMO2 | Asteraceae | Dicot |
| Asian crabgrass | Digitaria bicornis | DIBI | Poaceae | Monocot |
| Asian oakfern | Gymnocarpium jessoense | GYJE | Dryopteridaceae | Fern |
| Asian oakfern | Gymnocarpium jessoense ssp. parvulum | GYJEP | Dryopteridaceae | Fern |
| Asiatic dayflower | Commelina communis | COCO3 | Commelinaceae | Monocot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| Assiniboia sedge | Carex assiniboinensis | CAAS2 | Cyperaceae | Monocot |
| aster | Aster | ASTER | Asteraceae | Dicot |
| aster | Eurybia | EURYB | Asteraceae | Dicot |
| aster | Ionactis | IONAC | Asteraceae | Dicot |
| aster | Symphyotrichum ×woldenii | SYWO3 | Asteraceae | Dicot |
| aster | Symphyotrichum ×finkii | SYFI4 | Asteraceae | Dicot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| aster | Symphyotrichum ×amethystinum | SYAM3 | Asteraceae | Dicot |
| Atlantic camas | Camassia scilloides | CASC5 | Liliaceae | Monocot |
| 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 coralroot | Corallorhiza odontorhiza var. pringlei | COODP2 | Orchidaceae | Monocot |
| autumn olive | Elaeagnus umbellata | ELUM | Elaeagnaceae | Dicot |
| autumn olive | Elaeagnus umbellata var. parvifolia | ELUMP | Elaeagnaceae | Dicot |
| autumn onion | Allium stellatum | ALST | Liliaceae | Monocot |
| 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 |
| Back"s sedge | Carex backii | CABA3 | Cyperaceae | Monocot |
| bald brome | Bromus racemosus | BRRA2 | Poaceae | Monocot |
| bald spikerush | Eleocharis erythropoda | ELER | Cyperaceae | Monocot |
| Baldwin"s ironweed | Vernonia baldwinii | VEBA | Asteraceae | Dicot |
| Balkan catchfly | Silene csereii | SICS | Caryophyllaceae | Dicot |
| ballmustard | Neslia paniculata | NEPA3 | Brassicaceae | Dicot |
| balm-of-Gilead | Populus ×jackii | POJA2 | Salicaceae | Dicot |
| balsam fir | Abies balsamea | ABBA | Pinaceae | Gymnosperm |
| balsam fir | Abies balsamea var. balsamea | ABBAB | Pinaceae | Gymnosperm |
| balsam groundsel | Packera paupercula | PAPA20 | Asteraceae | Dicot |
| balsam poplar | Populus balsamifera | POBA2 | Salicaceae | Dicot |
| balsam poplar | Populus balsamifera ssp. balsamifera | POBAB2 | Salicaceae | Dicot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| barberry | Berberis | BERBE | Berberidaceae | Dicot |
| barley | ×Elyhordeum | ELYHO | Poaceae | Monocot |
| barley | Hordeum | HORDE | Poaceae | Monocot |
| barnyardgrass | Echinochloa crus-galli | ECCR | Poaceae | Monocot |
| basswood | Tilia | TILIA | Tiliaceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata ssp. umbellata | COUMU | Santalaceae | Dicot |
| beaked hazelnut | Corylus cornuta | COCO6 | Betulaceae | Dicot |
| beaked hazelnut | Corylus cornuta var. cornuta | COCOC2 | Betulaceae | Dicot |
| beaked panicgrass | Panicum anceps | PAAN | Poaceae | Monocot |
| beaked skeletonweed | Shinnersoseris | SHINN2 | Asteraceae | Dicot |
| beaked skeletonweed | Shinnersoseris rostrata | SHRO2 | Asteraceae | Dicot |
| beakgrain | Diarrhena | DIARR | Poaceae | Monocot |
| beaksedge | Rhynchospora | RHYNC3 | Cyperaceae | Monocot |
| bean | Phaseolus | PHASE | Fabaceae | Dicot |
| 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 |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| Bebb willow | Salix bebbiana | SABE2 | Salicaceae | Dicot |
| Bebb"s sedge | Carex bebbii | CABE2 | Cyperaceae | Monocot |
| Beck"s water-marigold | Bidens beckii | BIBE2 | Asteraceae | Dicot |
| bedstraw | Galium | GALIU | 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 |
| 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 |
| bellwort | Uvularia | UVULA | Liliaceae | Monocot |
| bentgrass | Agrostis | AGROS2 | 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 |
| Bicknell"s sedge | Carex bicknellii | CABI3 | Cyperaceae | Monocot |
| biennial beeblossom | Gaura biennis | GABI2 | Onagraceae | Dicot |
| biennial wormwood | Artemisia biennis | ARBI2 | Asteraceae | Dicot |
| biennial wormwood | Artemisia biennis var. biennis | ARBIB | Asteraceae | Dicot |
| big bluestem | Andropogon gerardii | ANGE | Poaceae | Monocot |
| big chickweed | Cerastium fontanum ssp. vulgare | CEFOV2 | Caryophyllaceae | Dicot |
| big devils beggartick | Bidens vulgata | BIVU | Asteraceae | Dicot |
| Big Horseshoe Lake dewberry | Rubus stipulatus | RUST7 | Rosaceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| bigleaf aster | Eurybia macrophylla | EUMA27 | Asteraceae | Dicot |
| bigseed alfalfa dodder | Cuscuta indecora | CUIN | Cuscutaceae | Dicot |
| bigseed dodder | Cuscuta indecora var. neuropetala | CUINN | Cuscutaceae | Dicot |
| bigtooth aspen | Populus grandidentata | POGR4 | Salicaceae | Dicot |
| billion-dollar grass | Echinochloa frumentacea | ECFR | Poaceae | Monocot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| bird vetch | Vicia cracca | VICR | Fabaceae | Dicot |
| bird vetch | Vicia cracca ssp. cracca | VICRC | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus | LOCO6 | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus var. corniculatus | LOCOC5 | Fabaceae | Dicot |
| birdeye pearlwort | Sagina procumbens | SAPR | Caryophyllaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdfoot violet | Viola pedata | VIPE | Violaceae | Dicot |
| bitter dock | Rumex obtusifolius | RUOB | Polygonaceae | Dicot |
| bittercress | Cardamine | CARDA | Brassicaceae | Dicot |
| bitternut hickory | Carya cordiformis | CACO15 | Juglandaceae | Dicot |
| bittersweet | Celastrus | CELAS | Celastraceae | Dicot |
| black ash | Fraxinus nigra | FRNI | Oleaceae | Dicot |
| black baneberry | Actaea racemosa | ACRA7 | Ranunculaceae | Dicot |
| black bindweed | Polygonum convolvulus | POCO10 | Polygonaceae | Dicot |
| black bindweed | Polygonum convolvulus var. convolvulus | POCOC2 | Polygonaceae | Dicot |
| black bugbane | Actaea racemosa var. racemosa | ACRAR | Ranunculaceae | Dicot |
| black cherry | Prunus serotina | PRSE2 | Rosaceae | Dicot |
| black cherry | Prunus serotina var. serotina | PRSES | Rosaceae | Dicot |
| black chokeberry | Photinia melanocarpa | PHME13 | 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 huckleberry | Gaylussacia baccata | GABA | Ericaceae | Dicot |
| black locust | Robinia pseudoacacia | ROPS | Fabaceae | Dicot |
| black maple | Acer nigrum | ACNI5 | Aceraceae | 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 |
| blackgirdle bulrush | Scirpus atrocinctus | SCAT4 | Cyperaceae | Monocot |
| blackhaw | Viburnum prunifolium | VIPR | Caprifoliaceae | Dicot |
| 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 |
| 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 |
| blite goosefoot | Chenopodium capitatum | CHCA4 | Chenopodiaceae | Dicot |
| blood panicgrass | Dichanthelium consanguineum | DICO4 | Poaceae | Monocot |
| bloodroot | Sanguinaria | SANGU | Papaveraceae | Dicot |
| bloodroot | Sanguinaria canadensis | SACA13 | Papaveraceae | Dicot |
| bloody butcher | Trillium recurvatum | TRRE5 | Liliaceae | Monocot |
| blue ash | Fraxinus quadrangulata | FRQU | Oleaceae | Dicot |
| blue cohosh | Caulophyllum thalictroides | CATH2 | Berberidaceae | Dicot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue fieldmadder | Sherardia arvensis | SHAR2 | Rubiaceae | 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 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 |
| blueberry | Vaccinium | VACCI | Ericaceae | Dicot |
| bluebill | Clematis pitcheri | CLPI | Ranunculaceae | Dicot |
| bluebill | Clematis pitcheri var. pitcheri | CLPIP | Ranunculaceae | Dicot |
| 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 |
| bluestem pricklypoppy | Argemone albiflora | ARAL3 | Papaveraceae | Dicot |
| bluestem pricklypoppy | Argemone albiflora ssp. albiflora | ARALA2 | Papaveraceae | Dicot |
| 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 sandwort | Moehringia lateriflora | MOLA6 | Caryophyllaceae | Dicot |
| bluntleaf waterleaf | Hydrophyllum canadense | HYCA3 | Hydrophyllaceae | Dicot |
| bluntlobe cliff fern | Woodsia obtusa | WOOB2 | Dryopteridaceae | Fern |
| bluntlobe cliff fern | Woodsia obtusa ssp. obtusa | WOOBO | Dryopteridaceae | Fern |
| bog birch | Betula pumila | BEPU4 | Betulaceae | Dicot |
| bog birch | Betula pumila var. glandulifera | BEPUG | Betulaceae | Dicot |
| bog bluegrass | Poa paludigena | POPA | Poaceae | Monocot |
| bog bulrush | Schoenoplectiella mucronata | SCMU15 | Cyperaceae | Monocot |
| bog goldenrod | Solidago uliginosa | SOUL | Asteraceae | Dicot |
| bog goldenrod | Solidago uliginosa var. uliginosa | SOULU | Asteraceae | Dicot |
| bog white violet | Viola lanceolata | VILA4 | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. lanceolata | VILAL | Violaceae | Dicot |
| bog willow | Salix pedicellaris | SAPE2 | Salicaceae | Dicot |
| bog willowherb | Epilobium leptophyllum | EPLE2 | Onagraceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| border privet | Ligustrum obtusifolium | LIOB | Oleaceae | Dicot |
| Boston ivy | Parthenocissus tricuspidata | PATR6 | Vitaceae | Dicot |
| bottlebrush sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| bottomland aster | Symphyotrichum ontarionis | SYON2 | Asteraceae | Dicot |
| bottomland dewberry | Rubus leviculus | RULE3 | Rosaceae | Dicot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| box knotweed | Polygonum buxiforme | POBU2 | Polygonaceae | Dicot |
| boxelder | Acer negundo | ACNE2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. negundo | ACNEN | Aceraceae | Dicot |
| boxelder | Acer negundo var. violaceum | ACNEV | Aceraceae | Dicot |
| brackenfern | Pteridium | PTERI | Dennstaedtiaceae | Fern |
| branched bur-reed | Sparganium androcladum | SPAN | Sparganiaceae | Monocot |
| branched centaury | Centaurium pulchellum | CEPU3 | Gentianaceae | Dicot |
| brasenia | Brasenia | BRASE | Cabombaceae | Dicot |
| Brazilian watermeal | Wolffia brasiliensis | WOBR | Lemnaceae | Monocot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| bride"s feathers | Aruncus dioicus | ARDI8 | Rosaceae | Dicot |
| bride"s feathers | Aruncus dioicus var. pubescens | ARDIP | Rosaceae | Dicot |
| bright green spikerush | Eleocharis olivacea | ELOL | Cyperaceae | Monocot |
| bright green spikerush | Eleocharis olivacea var. olivacea | ELOLO | Cyperaceae | Monocot |
| 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 dewberry | Rubus hispidus | RUHI | Rosaceae | Dicot |
| bristly greenbrier | Smilax tamnoides | SMTA2 | Smilacaceae | Monocot |
| bristly locust | Robinia hispida | ROHI | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. fertilis | ROHIF8 | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. hispida | ROHIH | Fabaceae | Dicot |
| bristly oxtongue | Picris echioides | PIEC | Asteraceae | Dicot |
| bristlystalked sedge | Carex leptalea | CALE10 | Cyperaceae | Monocot |
| bristlystalked sedge | Carex leptalea ssp. leptalea | CALEL4 | Cyperaceae | Monocot |
| British soldier lichen | Cladonia cristatella | CLCR2 | Cladoniaceae | Lichen |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle pricklypear | Opuntia fragilis | OPFR | Cactaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit | GATE2 | Lamiaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit var. tetrahit | GATET2 | Lamiaceae | Dicot |
| broad beechfern | Phegopteris hexagonoptera | PHHE11 | Thelypteridaceae | Fern |
| 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 helleborine | Epipactis helleborine | EPHE | Orchidaceae | Monocot |
| broadleaf rosette grass | Dichanthelium latifolium | DILA8 | Poaceae | Monocot |
| 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 |
| broomcorn millet | Panicum miliaceum ssp. miliaceum | PAMIM | Poaceae | Monocot |
| broomrape | Orobanche | OROBA | Orobanchaceae | Dicot |
| broomsedge bluestem | Andropogon virginicus | ANVI2 | Poaceae | Monocot |
| broomsedge bluestem | Andropogon virginicus var. virginicus | ANVIV | Poaceae | Monocot |
| broomweed | Amphiachyris | AMPHI8 | Asteraceae | Dicot |
| brown mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| brown widelip orchid | Liparis liliifolia | LILI3 | Orchidaceae | Monocot |
| browneyed Susan | Rudbeckia triloba | RUTR2 | Asteraceae | Dicot |
| browneyed Susan | Rudbeckia triloba var. triloba | RUTRT | Asteraceae | Dicot |
| brownray knapweed | Centaurea jacea | CEJA | Asteraceae | Dicot |
| buckbean | Menyanthes | MENYA | Menyanthaceae | Dicot |
| buckbean | Menyanthes trifoliata | METR3 | Menyanthaceae | Dicot |
| buckeye | Aesculus | AESCU | Hippocastanaceae | Dicot |
| buckeye | Aesculus ×marylandica | AEMA2 | Hippocastanaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckwheat | Fagopyrum | FAGOP2 | Polygonaceae | Dicot |
| buckwheat | Fagopyrum esculentum | FAES2 | Polygonaceae | 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 |
| bugle | Ajuga | AJUGA | Lamiaceae | Dicot |
| bugloss | Anchusa | ANCHU | Boraginaceae | Dicot |
| 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 |
| bulbous woodrush | Luzula bulbosa | LUBU | Juncaceae | Monocot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| Bull"s coraldrops | Besseya bullii | BEBU | Scrophulariaceae | Dicot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bulrush | Schoenoplectiella | SCHOE7 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus ×oblongus | SCOB10 | Cyperaceae | Monocot |
| bunchberry dogwood | Cornus canadensis | COCA13 | Cornaceae | Dicot |
| bundleflower | Desmanthus | DESMA | Fabaceae | Dicot |
| Bunge"s smartweed | Polygonum bungeanum | POBU3 | Polygonaceae | Dicot |
| bur cucumber | Sicyos | SICYO | Cucurbitaceae | Dicot |
| bur oak | Quercus macrocarpa | QUMA2 | 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 | Euonymus alatus | EUAL13 | Celastraceae | Dicot |
| burningbush | Euonymus alatus var. alatus | EUALA2 | Celastraceae | Dicot |
| burningbush | Euonymus atropurpureus | EUAT5 | Celastraceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burnweed | Erechtites | ERECH | Asteraceae | Dicot |
| bush honeysuckle | Diervilla | DIERV | Caprifoliaceae | Dicot |
| Bush"s goosefoot | Chenopodium berlandieri var. bushianum | CHBEB3 | Chenopodiaceae | Dicot |
| Bush"s poppymallow | Callirhoe bushii | CABU8 | Malvaceae | Dicot |
| Bush"s sedge | Carex bushii | CABU5 | Cyperaceae | Monocot |
| bushy knotweed | Polygonum ramosissimum | PORA3 | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. ramosissimum | PORAR | Polygonaceae | Dicot |
| butter and eggs | Linaria vulgaris | LIVU2 | Scrophulariaceae | Dicot |
| buttercup | Ranunculus | RANUN | Ranunculaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa | ASTU | Asclepiadaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa ssp. interior | ASTUI | Asclepiadaceae | Dicot |
| butternut | Juglans cinerea | JUCI | Juglandaceae | 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 |
| buttonweed | Diodia | DIODI | Rubiaceae | Dicot |
| Buxbaum"s sedge | Carex buxbaumii | CABU6 | Cyperaceae | Monocot |
| cabbage | Brassica oleracea | BROL | Brassicaceae | Dicot |
| calamus | Acorus calamus | ACCA4 | Acoraceae | Monocot |
| calico aster | Symphyotrichum lateriflorum | SYLA4 | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. lateriflorum | SYLAL7 | Asteraceae | Dicot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| callalily | Calla | CALLA | Araceae | Monocot |
| camas | Camassia | CAMAS | Liliaceae | Monocot |
| 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 goldenrod | Solidago canadensis var. canadensis | SOCAC3 | Asteraceae | Dicot |
| Canada lettuce | Lactuca canadensis | LACA | Asteraceae | Dicot |
| Canada mayflower | Maianthemum canadense | MACA4 | Liliaceae | Monocot |
| Canada thistle | Cirsium arvense | CIAR4 | Asteraceae | Dicot |
| Canada toadflax | Nuttallanthus canadensis | NUCA | Scrophulariaceae | Dicot |
| Canada wildrye | Elymus canadensis | ELCA4 | Poaceae | Monocot |
| Canada yew | Taxus canadensis | TACA7 | Taxaceae | Gymnosperm |
| Canadian anemone | Anemone canadensis | ANCA8 | Ranunculaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis | SACA15 | Apiaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis var. canadensis | SACAC2 | Apiaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis var. grandis | SACAG2 | Apiaceae | Dicot |
| Canadian clearweed | Pilea pumila | PIPU2 | Urticaceae | Dicot |
| Canadian clearweed | Pilea pumila var. pumila | PIPUP | Urticaceae | Dicot |
| Canadian hawkweed | Hieracium kalmii var. fasciculatum | HIKAF | Asteraceae | 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 plum | Prunus nigra | PRNI | Rosaceae | Dicot |
| Canadian rush | Juncus canadensis | JUCA3 | Juncaceae | Monocot |
| Canadian waterweed | Elodea canadensis | ELCA7 | Hydrocharitaceae | Monocot |
| Canadian white violet | Viola canadensis | VICA4 | Violaceae | Dicot |
| Canadian wildginger | Asarum canadense | ASCA | Aristolochiaceae | Dicot |
| Canadian woodnettle | Laportea canadensis | LACA3 | Urticaceae | Dicot |
| canary violet | Viola ×primulifolia | VIPR4 | Violaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| cancer-root | Conopholis | CONOP | Orobanchaceae | Dicot |
| candle anemone | Anemone cylindrica | ANCY | Ranunculaceae | Dicot |
| candytuft | Iberis | IBERI | Brassicaceae | Dicot |
| capsella | Capsella | CAPSE | Brassicaceae | Dicot |
| caraway | Carum carvi | CACA19 | Apiaceae | Dicot |
| cardinalflower | Lobelia cardinalis | LOCA2 | Campanulaceae | Dicot |
| carelessweed | Cyclachaena | CYCLA4 | Asteraceae | Dicot |
| Carelessweed | Cyclachaena xanthiifolia | CYXA2 | Asteraceae | Dicot |
| Carey"s sedge | Carex careyana | CACA14 | Cyperaceae | Monocot |
| 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. carolinianum | DECAC3 | Ranunculaceae | Dicot |
| Carolina larkspur | Delphinium carolinianum ssp. virescens | DECAV2 | Ranunculaceae | Dicot |
| Carolina poplar | Populus ×canadensis | POCA19 | Salicaceae | Dicot |
| 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 |
| carpenter"s square | Scrophularia marilandica | SCMA2 | Scrophulariaceae | Dicot |
| carpetweed | Mollugo | MOLLU | Molluginaceae | Dicot |
| carum | Carum | CARUM | Apiaceae | Dicot |
| catalpa | Catalpa | CATAL | Bignoniaceae | Dicot |
| catchfly | Silene | SILEN | Caryophyllaceae | Dicot |
| catchfly grass | Leersia lenticularis | LELE2 | Poaceae | Monocot |
| catnip | Nepeta | NEPET | Lamiaceae | Dicot |
| catnip | Nepeta cataria | NECA2 | Lamiaceae | Dicot |
| cattail | Typha | TYPHA | Typhaceae | Monocot |
| cattail sedge | Carex typhina | CATY | Cyperaceae | 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 |
| chamomile | Chamaemelum | CHAMA11 | 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 |
| chee reedgrass | Calamagrostis epigeios | CAEP | Poaceae | Monocot |
| chee reedgrass | Calamagrostis epigeios ssp. epigeios | CAEPE2 | Poaceae | Monocot |
| cheerful sunflower | Helianthus ×laetiflorus | HELA | Asteraceae | Dicot |
| cheeseweed mallow | Malva parviflora | MAPA5 | Malvaceae | Dicot |
| chervil | Chaerophyllum | CHAER | Apiaceae | Dicot |
| chestnut | Castanea | CASTA | Fagaceae | Dicot |
| chicory | Cichorium | CICHO | Asteraceae | Dicot |
| chicory | Cichorium intybus | CIIN | Asteraceae | Dicot |
| Chinese buckthorn | Rhamnus utilis | RHUT80 | Rhamnaceae | Dicot |
| Chinese chives | Allium tuberosum | ALTU3 | Liliaceae | Monocot |
| chinkapin oak | Quercus muehlenbergii | QUMU | Fagaceae | Dicot |
| chokeberry | Photinia | PHOTI | Rosaceae | Dicot |
| chokecherry | Prunus virginiana | PRVI | Rosaceae | Dicot |
| chorispora | Chorispora | CHORI | Brassicaceae | Dicot |
| Christmas fern | Polystichum acrostichoides | POAC4 | Dryopteridaceae | Fern |
| Christmas fern | Polystichum acrostichoides var. acrostichoides | POACA | Dryopteridaceae | Fern |
| churchmouse threeawn | Aristida dichotoma | ARDI4 | Poaceae | Monocot |
| churchmouse threeawn | Aristida dichotoma var. dichotoma | ARDID | Poaceae | Monocot |
| churchsteeples | Agrimonia eupatoria | AGEU | Rosaceae | Dicot |
| cinnamon fern | Osmunda cinnamomea | OSCI | Osmundaceae | Fern |
| cinnamon fern | Osmunda cinnamomea var. cinnamomea | OSCIC | Osmundaceae | Fern |
| 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 |
| claspingleaf doll"s daisy | Boltonia decurrens | BODE2 | Asteraceae | Dicot |
| claspleaf pennycress | Microthlaspi perfoliatum | MIPE8 | Brassicaceae | Dicot |
| Clayton"s sweetroot | Osmorhiza claytonii | OSCL | Apiaceae | Dicot |
| clearweed | Pilea | PILEA | Urticaceae | Dicot |
| cleft phlox | Phlox bifida | PHBI3 | Polemoniaceae | Dicot |
| cleft phlox | Phlox bifida ssp. bifida | PHBIB | Polemoniaceae | Dicot |
| Cleland"s evening primrose | Oenothera clelandii | OECL3 | Onagraceae | 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. cristatum | POSCC | Polygonaceae | Dicot |
| climbing false buckwheat | Polygonum scandens var. dumetorum | POSCD | 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 |
| clinopodium | Clinopodium | CLINO | Lamiaceae | Dicot |
| cloaked bulrush | Scirpus pallidus | SCPA8 | Cyperaceae | Monocot |
| closed bottle gentian | Gentiana andrewsii | GEAN | Gentianaceae | Dicot |
| closed bottle gentian | Gentiana andrewsii var. andrewsii | GEANA | Gentianaceae | Dicot |
| closedhead sedge | Carex norvegica ssp. inferalpina | CANOI | Cyperaceae | Monocot |
| clover | Trifolium | TRIFO | Fabaceae | Dicot |
| clover dodder | Cuscuta epithymum | CUEP | Cuscutaceae | Dicot |
| clubmoss | Huperzia | HUPER | Lycopodiaceae | Lycopod |
| clubmoss | Huperzia ×bartleyi | HUBA | Lycopodiaceae | Lycopod |
| clubmoss | Lycopodiella | LYCOP6 | Lycopodiaceae | Lycopod |
| clubmoss | Lycopodium | LYCOP2 | Lycopodiaceae | Lycopod |
| 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 |
| clustered poppymallow | Callirhoe triangulata | CATR | Malvaceae | Dicot |
| coast cockspur grass | Echinochloa walteri | ECWA | Poaceae | Monocot |
| coast tarweed | Madia sativa | MASA | Asteraceae | Dicot |
| coastal jointweed | Polygonella articulata | POAR4 | Polygonaceae | Dicot |
| coastal plain panicgrass | Dichanthelium longiligulatum | DILO4 | Poaceae | Monocot |
| cobaea beardtongue | Penstemon cobaea | PECO4 | Scrophulariaceae | Dicot |
| cocklebur | Xanthium | XANTH2 | Asteraceae | Dicot |
| cockspur grass | Echinochloa | ECHIN4 | Poaceae | Monocot |
| cockspur hawthorn | Crataegus crus-galli | CRCR2 | Rosaceae | Dicot |
| coffeetree | Gymnocladus | GYMNO2 | Fabaceae | Dicot |
| cohosh | Caulophyllum | CAULO | Berberidaceae | Dicot |
| Columbian monkshood | Aconitum columbianum | ACCO4 | Ranunculaceae | Dicot |
| Columbian monkshood | Aconitum columbianum ssp. columbianum | ACCOC3 | Ranunculaceae | Dicot |
| Columbian watermeal | Wolffia columbiana | WOCO | Lemnaceae | Monocot |
| columbine | Aquilegia | AQUIL | Ranunculaceae | Dicot |
| comarum | Comarum | COMAR3 | Rosaceae | 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 bugle | Ajuga reptans | AJRE | Lamiaceae | 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 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 dogmustard | Erucastrum gallicum | ERGA | Brassicaceae | Dicot |
| common duckmeat | Spirodela polyrrhiza | SPPO | Lemnaceae | Monocot |
| common duckweed | Lemna minor | LEMI3 | Lemnaceae | Monocot |
| common evening primrose | Oenothera biennis | OEBI | Onagraceae | Dicot |
| common flax | Linum usitatissimum | LIUS | Linaceae | Dicot |
| common goldstar | Hypoxis hirsuta | HYHI2 | Liliaceae | Monocot |
| common gypsyweed | Veronica officinalis | VEOF2 | Scrophulariaceae | Dicot |
| common gypsyweed | Veronica officinalis var. officinalis | VEOFO | Scrophulariaceae | Dicot |
| common hackberry | Celtis occidentalis | CEOC | Ulmaceae | Dicot |
| common hardgrass | Sclerochloa dura | SCDU2 | Poaceae | Monocot |
| common hop | Humulus lupulus | HULU | Cannabaceae | Dicot |
| common hop | Humulus lupulus var. lupuloides | HULUL | Cannabaceae | Dicot |
| common hop | Humulus lupulus var. 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 kidneyvetch | Anthyllis vulneraria | ANVU | Fabaceae | Dicot |
| common ladyfern | Athyrium filix-femina | ATFI | Dryopteridaceae | Fern |
| common lilac | Syringa vulgaris | SYVU | Oleaceae | Dicot |
| common mallow | Malva neglecta | MANE | Malvaceae | Dicot |
| common mare"s-tail | Hippuris vulgaris | HIVU2 | Hippuridaceae | 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 ninebark | Physocarpus opulifolius var. opulifolius | PHOPO | Rosaceae | Dicot |
| common nipplewort | Lapsana communis | LACO3 | Asteraceae | Dicot |
| common oat | Avena sativa | AVSA | Poaceae | Monocot |
| common pear | Pyrus communis | PYCO | Rosaceae | Dicot |
| common pepperweed | Lepidium densiflorum | LEDE | Brassicaceae | Dicot |
| common periwinkle | Vinca minor | VIMI2 | Apocynaceae | Dicot |
| common 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 salttree | Halimodendron halodendron | HAHA8 | Fabaceae | Dicot |
| common selfheal | Prunella vulgaris | PRVU | Lamiaceae | Dicot |
| common selfheal | Prunella vulgaris ssp. vulgaris | PRVUV | 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 St. Johnswort | Hypericum perforatum | HYPE | Clusiaceae | Dicot |
| 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 threesquare | Schoenoplectus pungens var. pungens | SCPUP5 | Cyperaceae | Monocot |
| common velvetgrass | Holcus lanatus | HOLA | Poaceae | Monocot |
| common viper"s bugloss | Echium vulgare | ECVU | Boraginaceae | Dicot |
| common wheat | Triticum aestivum | TRAE | Poaceae | Monocot |
| common winterberry | Ilex verticillata | ILVE | Aquifoliaceae | Dicot |
| common woodrush | Luzula multiflora | LUMU2 | Juncaceae | Monocot |
| common woodrush | Luzula multiflora ssp. multiflora | LUMUM | Juncaceae | Monocot |
| common woodrush | Luzula multiflora ssp. multiflora var. multiflora | LUMUM2 | Juncaceae | Monocot |
| common wormwood | Artemisia vulgaris | ARVU | Asteraceae | Dicot |
| 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 |
| convallaria | Convallaria | CONVA | Liliaceae | Monocot |
| coolwort | Sullivantia | SULLI | Saxifragaceae | Dicot |
| coon"s tail | Ceratophyllum demersum | CEDE4 | Ceratophyllaceae | 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 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 |
| cotoneaster | Cotoneaster | COTON | Rosaceae | Dicot |
| cotoneaster | Cotoneaster multiflorus | COMU9 | Rosaceae | Dicot |
| cottongrass | Eriophorum | ERIOP | Cyperaceae | Monocot |
| cottonthistle | Onopordum | ONOPO | Asteraceae | Dicot |
| cottonwood | Populus | POPUL | Salicaceae | Dicot |
| cottonwood | Populus ×rouleauiana | PORO4 | Salicaceae | Dicot |
| cow soapwort | Vaccaria hispanica | VAHI2 | Caryophyllaceae | Dicot |
| cowbane | Oxypolis | OXYPO | Apiaceae | 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 |
| Crawford"s sedge | Carex crawfordii | CACR4 | Cyperaceae | Monocot |
| cream pea | Lathyrus ochroleucus | LAOC2 | Fabaceae | Dicot |
| creamflower rockcress | Arabis hirsuta var. pycnocarpa | ARHIP | Brassicaceae | Dicot |
| creeper | Parthenocissus | PARTH3 | Vitaceae | Dicot |
| creeping bentgrass | Agrostis stolonifera | AGST2 | Poaceae | Monocot |
| creeping burhead | Echinodorus cordifolius | ECCO3 | Alismataceae | Monocot |
| creeping buttercup | Ranunculus repens | RARE3 | Ranunculaceae | Dicot |
| creeping jenny | Lysimachia nummularia | LYNU | Primulaceae | Dicot |
| creeping juniper | Juniperus horizontalis | JUHO2 | Cupressaceae | Gymnosperm |
| creeping lespedeza | Lespedeza repens | LERE2 | Fabaceae | Dicot |
| creeping lovegrass | Neeragrostis | NEERA2 | Poaceae | Monocot |
| creeping lovegrass | Neeragrostis reptans | NERE3 | Poaceae | Monocot |
| creeping sedge | Carex chordorrhiza | CACH5 | Cyperaceae | Monocot |
| creeping yellowcress | Rorippa sylvestris | ROSY | Brassicaceae | Dicot |
| creepingroot violet | Viola canadensis var. rugulosa | VICAR | Violaceae | Dicot |
| crested anoda | Anoda cristata | ANCR2 | Malvaceae | 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 |
| crookedstem aster | Symphyotrichum prenanthoides | SYPR6 | Asteraceae | 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 |
| crownvetch | Securigera | SECUR3 | Fabaceae | Dicot |
| crownvetch | Securigera varia | SEVA4 | Fabaceae | Dicot |
| cudweed | Pseudognaphalium | PSEUD43 | Asteraceae | Dicot |
| cultivated currant | Ribes rubrum | RIRU80 | Grossulariaceae | Dicot |
| 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 plumeless thistle | Carduus crispus | CACR2 | Asteraceae | Dicot |
| curly pondweed | Potamogeton crispus | POCR3 | Potamogetonaceae | Monocot |
| curlycup gumweed | Grindelia squarrosa | GRSQ | 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. grandibracteata | COCUG2 | 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 evening primrose | Oenothera laciniata | OELA | Onagraceae | Dicot |
| cutleaf grapefern | Botrychium dissectum | BODI2 | Ophioglossaceae | Fern |
| cutleaf nightshade | Solanum triflorum | SOTR | Solanaceae | Dicot |
| cutleaf teasel | Dipsacus laciniatus | DILA4 | Dipsacaceae | Dicot |
| cutleaf toothwort | Cardamine concatenata | CACO26 | Brassicaceae | Dicot |
| cutleaf watermilfoil | Myriophyllum pinnatum | MYPI | Haloragaceae | Dicot |
| cutleaf waterparsnip | Berula erecta | BEER | Apiaceae | Dicot |
| cycloloma | Cycloloma | CYCLO | Chenopodiaceae | Dicot |
| cypress panicgrass | Dichanthelium dichotomum | DIDI6 | Poaceae | Monocot |
| cypress panicgrass | Dichanthelium dichotomum var. dichotomum | DIDID | Poaceae | Monocot |
| cypress spurge | Euphorbia cyparissias | EUCY2 | Euphorbiaceae | Dicot |
| Dahurian buckthorn | Rhamnus davurica | RHDA | Rhamnaceae | Dicot |
| Dahurian buckthorn | Rhamnus davurica ssp. davurica | RHDAD2 | Rhamnaceae | Dicot |
| Dahurian lespedeza | Lespedeza daurica | LEDA3 | Fabaceae | Dicot |
| daisy | Leucanthemum | LEUCA4 | Asteraceae | Dicot |
| Dakota gentian | Gentiana andrewsii var. dakotica | GEAND | Gentianaceae | Dicot |
| Dalmatian toadflax | Linaria dalmatica | LIDA | Scrophulariaceae | Dicot |
| Dalmatian toadflax | Linaria dalmatica ssp. macedonica | LIDAM | Scrophulariaceae | Dicot |
| dames rocket | Hesperis matronalis | HEMA3 | Brassicaceae | Dicot |
| dandelion | Taraxacum | TARAX | Asteraceae | Dicot |
| Darnel ryegrass | Lolium temulentum | LOTE2 | Poaceae | Monocot |
| Darnel ryegrass | Lolium temulentum ssp. temulentum | LOTET | Poaceae | Monocot |
| dasistoma | Dasistoma | DASIS | Scrophulariaceae | Dicot |
| David"s spurge | Euphorbia davidii | EUDA5 | Euphorbiaceae | Dicot |
| Davis" sedge | Carex davisii | CADA | Cyperaceae | Monocot |
| dawnflower | Stylisma | STYLI | Convolvulaceae | Dicot |
| dayflower | Commelina | COMME | Commelinaceae | Monocot |
| daylily | Hemerocallis | HEMER | Liliaceae | Monocot |
| DC dewberry | Rubus fecundus | RUFE | Rosaceae | Dicot |
| deadly nightshade | Solanum interius | SOIN2 | Solanaceae | Dicot |
| deadnettle | Lamium | LAMIU | Lamiaceae | Dicot |
| Deam"s clearweed | Pilea pumila var. deamii | PIPUD | Urticaceae | Dicot |
| Deam"s rosinweed | Silphium integrifolium var. deamii | SIIND | Asteraceae | Dicot |
| Deam"s threeseed mercury | Acalypha deamii | ACDE4 | Euphorbiaceae | Dicot |
| deathcamas | Zigadenus | ZIGAD | Liliaceae | Monocot |
| decodon | Decodon | DECOD | Lythraceae | Dicot |
| deertongue | Dichanthelium clandestinum | DICL | Poaceae | Monocot |
| denseflower mullein | Verbascum densiflorum | VEDE4 | Scrophulariaceae | 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 goosefoot | Chenopodium pratericola | CHPR5 | Chenopodiaceae | Dicot |
| desert wheatgrass | Agropyron desertorum | AGDE2 | Poaceae | Monocot |
| 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 |
| devilqueen | Phedimus | PHEDI | Crassulaceae | Dicot |
| Dewey sedge | Carex deweyana | CADE9 | Cyperaceae | Monocot |
| Dewey sedge | Carex deweyana var. deweyana | CADED4 | Cyperaceae | Monocot |
| diamond-flowers | Stenaria | STENA3 | Rubiaceae | Dicot |
| diamond-flowers | Stenaria nigricans | STNI6 | Rubiaceae | Dicot |
| diamondflowers | Stenaria nigricans var. nigricans | STNIN | Rubiaceae | Dicot |
| didiplis | Didiplis | DIDIP | Lythraceae | Dicot |
| diffuse knapweed | Centaurea diffusa | CEDI3 | Asteraceae | Dicot |
| diffuse wallflower | Erysimum diffusum | ERDI19 | Brassicaceae | Dicot |
| dill | Anethum | ANETH | Apiaceae | Dicot |
| dill | Anethum graveolens | ANGR2 | Apiaceae | Dicot |
| Dillenius" ticktrefoil | Desmodium glabellum | DEGL4 | Fabaceae | Dicot |
| dioecious sedge | Carex sterilis | CAST16 | Cyperaceae | Monocot |
| 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 stonecrop | Penthorum sedoides | PESE6 | Crassulaceae | Dicot |
| diverseglume wildrye | Elymus diversiglumis | ELDI3 | Poaceae | Monocot |
| dock | Rumex | RUMEX | Polygonaceae | Dicot |
| dodder | Cuscuta | CUSCU | Cuscutaceae | Dicot |
| dogbane | Apocynum | APOCY | Apocynaceae | Dicot |
| dogmustard | Erucastrum | ERUCA2 | Brassicaceae | Dicot |
| dogshade | Limnosciadium | LIMNO3 | Apiaceae | Dicot |
| dogtooth violet | Erythronium americanum | ERAM5 | Liliaceae | Monocot |
| dogtooth violet | Erythronium americanum ssp. americanum | ERAMA2 | Liliaceae | Monocot |
| 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 hawthorn | Crataegus punctata | CRPU | Rosaceae | 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 |
| 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 |
| dovefoot geranium | Geranium molle | GEMO | Geraniaceae | Dicot |
| downy arrowwood | Viburnum rafinesqueanum | VIRA | Caprifoliaceae | Dicot |
| downy cinquefoil | Potentilla intermedia | POIN8 | Rosaceae | Dicot |
| downy gentian | Gentiana puberulenta | GEPU5 | Gentianaceae | Dicot |
| downy hawthorn | Crataegus mollis | CRMO2 | Rosaceae | Dicot |
| downy pagoda-plant | Blephilia ciliata | BLCI | Lamiaceae | 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 phlox | Phlox pilosa ssp. pilosa | PHPIP2 | Polemoniaceae | Dicot |
| downy rattlesnake plantain | Goodyera pubescens | GOPU | Orchidaceae | Monocot |
| downy willowherb | Epilobium strictum | EPST | Onagraceae | 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. officinalis | FUOFO | Fumariaceae | Dicot |
| drumheads | Polygala cruciata | POCR | Polygalaceae | Dicot |
| drumheads | Polygala cruciata var. aquilonia | POCRA | Polygalaceae | Dicot |
| Drummond"s aster | Symphyotrichum drummondii | SYDR | Asteraceae | Dicot |
| Drummond"s aster | Symphyotrichum drummondii var. drummondii | SYDRD | Asteraceae | Dicot |
| Drummond"s dropseed | Sporobolus compositus var. drummondii | SPCOD3 | Poaceae | Monocot |
| Drummond"s halfchaff sedge | Lipocarpha drummondii | LIDR3 | Cyperaceae | Monocot |
| Drummond"s rockcress | Arabis drummondii | ARDR | Brassicaceae | Dicot |
| dryslope dewberry | Rubus meracus | RUME3 | Rosaceae | Dicot |
| dryspike sedge | Carex siccata | CASI12 | Cyperaceae | Monocot |
| 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 |
| dutchman"s pipe | Aristolochia | ARIST2 | Aristolochiaceae | Dicot |
| dwarf chinkapin oak | Quercus prinoides | QUPR | Fagaceae | Dicot |
| dwarf cinquefoil | Potentilla canadensis | POCA17 | Rosaceae | Dicot |
| dwarf cinquefoil | Potentilla canadensis var. canadensis | POCAC2 | Rosaceae | Dicot |
| dwarf false indigo | Amorpha nana | AMNA | Fabaceae | Dicot |
| dwarf gentian | Gentianella | GENTI2 | Gentianaceae | Dicot |
| dwarf groundcherry | Physalis pumila | PHPU8 | Solanaceae | Dicot |
| dwarf horseweed | Conyza ramosissima | CORA4 | Asteraceae | Dicot |
| dwarf larkspur | Delphinium tricorne | DETR | Ranunculaceae | Dicot |
| dwarf nettle | Urtica urens | URUR | Urticaceae | Dicot |
| dwarf red blackberry | Rubus pubescens | RUPU | Rosaceae | Dicot |
| dwarf red blackberry | Rubus pubescens var. pubescens | RUPUP2 | Rosaceae | Dicot |
| dwarf scouringrush | Equisetum scirpoides | EQSC | Equisetaceae | Horsetail |
| dwarf snapdragon | Chaenorhinum | CHAEN7 | Scrophulariaceae | Dicot |
| dwarf snapdragon | Chaenorhinum minus | CHMI | Scrophulariaceae | Dicot |
| dwarf spikerush | Eleocharis parvula | ELPA5 | Cyperaceae | Monocot |
| dwarf St. Johnswort | Hypericum mutilum | HYMU | Clusiaceae | Dicot |
| dwarfdandelion | Krigia | KRIGI | Asteraceae | Dicot |
| dysphania | Dysphania | DYSPH | Chenopodiaceae | Dicot |
| dyssodia | Dyssodia | DYSSO | Asteraceae | Dicot |
| earleaf false foxglove | Agalinis auriculata | AGAU3 | Scrophulariaceae | 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 |
| earth loosestrife | Lysimachia terrestris | LYTE2 | Primulaceae | Dicot |
| eastern beebalm | Monarda bradburiana | MOBR2 | Lamiaceae | 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 cottonwood | Populus deltoides ssp. deltoides | PODED | Salicaceae | Dicot |
| eastern daisy fleabane | Erigeron annuus | ERAN | Asteraceae | Dicot |
| eastern false rue anemone | Enemion biternatum | ENBI | Ranunculaceae | Dicot |
| eastern gamagrass | Tripsacum dactyloides | TRDA3 | Poaceae | Monocot |
| eastern greenviolet | Hybanthus concolor | HYCO6 | Violaceae | Dicot |
| eastern hemlockparsley | Conioselinum chinense | COCH2 | Apiaceae | Dicot |
| eastern leatherwood | Dirca palustris | DIPA9 | Thymelaeaceae | 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 prickly gooseberry | Ribes cynosbati | RICY | Grossulariaceae | Dicot |
| eastern purple coneflower | Echinacea purpurea | ECPU | Asteraceae | Dicot |
| eastern redbud | Cercis canadensis | CECA4 | Fabaceae | Dicot |