List of Louisiana Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| Abbeville iris | Iris ×nelsonii | IRNE | Iridaceae | Monocot |
| acacia | Acacia | ACACI | Fabaceae | Dicot |
| acidswamp yelloweyed grass | Xyris serotina | XYSE | Xyridaceae | Monocot |
| Adam"s needle | Yucca filamentosa | YUFI | Agavaceae | 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 |
| adzuki bean | Vigna angularis | VIAN7 | Fabaceae | Dicot |
| African tamarisk | Tamarix africana | TAAF | Tamaricaceae | Dicot |
| agave | Agave | AGAVE | Agavaceae | Monocot |
| agrimony | Agrimonia | AGRIM | Rosaceae | Dicot |
| agropogon | ×Agropogon | AGROP3 | Poaceae | Monocot |
| ailanthus | Ailanthus | AILAN | Simaroubaceae | Dicot |
| air yam | Dioscorea bulbifera | DIBU | Dioscoreaceae | Monocot |
| airplant | Tillandsia | TILLA2 | Bromeliaceae | Monocot |
| Alabama blazing star | Liatris squarrosa var. alabamensis | LISQA | Asteraceae | Dicot |
| Alabama lipfern | Cheilanthes alabamensis | CHAL5 | Pteridaceae | Fern |
| Alabama supplejack | Berchemia scandens | BESC | Rhamnaceae | Dicot |
| albizia | Albizia | ALBIZ | Fabaceae | Dicot |
| alder | Alnus | ALNUS | Betulaceae | Dicot |
| alfalfa | Medicago | MEDIC | Fabaceae | Dicot |
| alfalfa | Medicago sativa | MESA | Fabaceae | Dicot |
| alfalfa | Medicago sativa ssp. sativa | MESAS | Fabaceae | Dicot |
| algal bulrush | Websteria | WEBST | Cyperaceae | Monocot |
| algal bulrush | Websteria confervoides | WECO | Cyperaceae | Monocot |
| Allegheny monkeyflower | Mimulus ringens | MIRI | Scrophulariaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens var. ringens | MIRIR | Scrophulariaceae | Dicot |
| Allegheny stonecrop | Hylotelephium telephioides | HYTE9 | Crassulaceae | Dicot |
| Allegheny-spurge | Pachysandra procumbens | PAPR7 | Buxaceae | Dicot |
| alligator-flag | Thalia | THALI | Marantaceae | Monocot |
| alligatorweed | Alternanthera philoxeroides | ALPH | Amaranthaceae | Dicot |
| aloe yucca | Yucca aloifolia | YUAL | Agavaceae | Monocot |
| alophia | Alophia | ALOPH | Iridaceae | Monocot |
| alsike clover | Trifolium hybridum | TRHY | Fabaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| amamastla | Rumex chrysocarpus | RUCH3 | Polygonaceae | Dicot |
| amaryllis | Amaryllis | AMARY | Liliaceae | Monocot |
| Amazon sprangletop | Leptochloa panicoides | LEPA3 | Poaceae | Monocot |
| amberique-bean | Strophostyles helvola | STHE9 | Fabaceae | Dicot |
| American alumroot | Heuchera americana | HEAM6 | Saxifragaceae | Dicot |
| American alumroot | Heuchera americana var. americana | HEAMA2 | Saxifragaceae | Dicot |
| American basswood | Tilia americana | TIAM | Tiliaceae | Dicot |
| American basswood | Tilia americana var. heterophylla | TIAMH | Tiliaceae | Dicot |
| American beautyberry | Callicarpa americana | CAAM2 | Verbenaceae | Dicot |
| American beech | Fagus grandifolia | FAGR | Fagaceae | 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 elderberry | Sambucus nigra ssp. canadensis | SANIC4 | Caprifoliaceae | Dicot |
| American black nightshade | Solanum americanum | SOAM | Solanaceae | Dicot |
| American bladdernut | Staphylea trifolia | STTR | Staphyleaceae | Dicot |
| American bluehearts | Buchnera americana | BUAM | Scrophulariaceae | Dicot |
| American buckwheat vine | Brunnichia ovata | BROV4 | Polygonaceae | 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 century plant | Agave americana | AGAM | Agavaceae | Monocot |
| American century plant | Agave americana ssp. americana | AGAMA | Agavaceae | Monocot |
| American century plant | Agave americana ssp. americana var. americana | AGAMA2 | Agavaceae | Monocot |
| American chestnut | Castanea dentata | CADE12 | Fagaceae | Dicot |
| American cupscale | Sacciolepis striata | SAST | Poaceae | Monocot |
| American eelgrass | Vallisneria americana | VAAM3 | Hydrocharitaceae | Monocot |
| American elm | Ulmus americana | ULAM | Ulmaceae | Dicot |
| American featherfoil | Hottonia inflata | HOIN | Primulaceae | 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. bracteata | AMBRB | Fabaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata var. comosa | AMBRC | Fabaceae | Dicot |
| American holly | Ilex opaca | ILOP | Aquifoliaceae | Dicot |
| American holly | Ilex opaca var. opaca | ILOPO | Aquifoliaceae | Dicot |
| American hornbeam | Carpinus caroliniana | CACA18 | Betulaceae | Dicot |
| American hornbeam | Carpinus caroliniana ssp. caroliniana | CACAC2 | Betulaceae | Dicot |
| American ipecac | Gillenia stipulata | GIST5 | Rosaceae | Dicot |
| American lopseed | Phryma leptostachya | PHLE5 | Verbenaceae | Dicot |
| American lotus | Nelumbo lutea | NELU | Nelumbonaceae | Dicot |
| American plum | Prunus americana | PRAM | Rosaceae | Dicot |
| American pokeweed | Phytolacca americana | PHAM4 | Phytolaccaceae | Dicot |
| American pokeweed | Phytolacca americana var. americana | PHAMA3 | Phytolaccaceae | Dicot |
| American pokeweed | Phytolacca americana var. rigida | PHAMR | Phytolaccaceae | Dicot |
| American searocket | Cakile edentula | CAED | Brassicaceae | Dicot |
| American searocket | Cakile edentula ssp. edentula | CAEDE | Brassicaceae | Dicot |
| American searocket | Cakile edentula ssp. edentula var. edentula | CAEDE2 | Brassicaceae | Dicot |
| American snowbell | Styrax americanus | STAM4 | Styracaceae | Dicot |
| American spongeplant | Limnobium spongia | LISP2 | Hydrocharitaceae | Monocot |
| American sycamore | Platanus occidentalis | PLOC | Platanaceae | Dicot |
| American water horehound | Lycopus americanus | LYAM | Lamiaceae | Dicot |
| American water-willow | Justicia americana | JUAM | Acanthaceae | Dicot |
| American waterwort | Elatine americana | ELAM3 | Elatinaceae | Dicot |
| American white waterlily | Nymphaea odorata | NYOD | Nymphaeaceae | Dicot |
| American white waterlily | Nymphaea odorata ssp. odorata | NYODO | Nymphaeaceae | Dicot |
| American wild carrot | Daucus pusillus | DAPU3 | Apiaceae | Dicot |
| American wisteria | Wisteria frutescens | WIFR | Fabaceae | Dicot |
| American witchhazel | Hamamelis virginiana | HAVI4 | Hamamelidaceae | Dicot |
| amianthium | Amianthium | AMIAN | Liliaceae | Monocot |
| ammi | Ammi | AMMI4 | Apiaceae | Dicot |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| angelica | Angelica | ANGEL | Apiaceae | Dicot |
| anglestem beaksedge | Rhynchospora caduca | RHCA9 | Cyperaceae | Monocot |
| anglestem primrose-willow | Ludwigia leptocarpa | LULE4 | Onagraceae | Dicot |
| Angleton bluestem | Dichanthium aristatum | DIAR5 | Poaceae | Monocot |
| angularfruit milkvine | Matelea gonocarpos | MAGO | Asclepiadaceae | Dicot |
| anil de pasto | Indigofera suffruticosa | INSU | Fabaceae | Dicot |
| anisescented goldenrod | Solidago odora | SOOD | Asteraceae | Dicot |
| anisescented goldenrod | Solidago odora var. odora | SOODO | Asteraceae | Dicot |
| anisetree | Illicium | ILLIC | Illiciaceae | Dicot |
| annual bastardcabbage | Rapistrum rugosum | RARU | Brassicaceae | Dicot |
| annual blue-eyed grass | Sisyrinchium rosulatum | SIRO5 | Iridaceae | Monocot |
| annual bluegrass | Poa annua | POAN | Poaceae | Monocot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual fescue | Vulpia myuros | VUMY | Poaceae | Monocot |
| annual fimbry | Fimbristylis annua | FIAN | Cyperaceae | Monocot |
| annual marsh elder | Iva annua | IVAN2 | Asteraceae | Dicot |
| annual marsh elder | Iva annua var. annua | IVANA | Asteraceae | Dicot |
| annual marsh elder | Iva annua var. caudata | IVANC | Asteraceae | Dicot |
| annual pearlwort | Sagina apetala | SAAP | Caryophyllaceae | Dicot |
| annual phlox | Phlox drummondii | PHDR | Polemoniaceae | Dicot |
| annual phlox | Phlox drummondii ssp. drummondii | PHDRD | Polemoniaceae | Dicot |
| annual rabbitsfoot grass | Polypogon monspeliensis | POMO5 | Poaceae | Monocot |
| annual ragweed | Ambrosia artemisiifolia | AMAR2 | Asteraceae | Dicot |
| annual ragweed | Ambrosia artemisiifolia var. paniculata | AMARP | Asteraceae | Dicot |
| annual seepweed | Suaeda linearis | SULI | Chenopodiaceae | Dicot |
| annual silver hairgrass | Aira elegans | AIEL4 | Poaceae | Monocot |
| annual trampweed | Facelis retusa | FARE | 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 |
| annual yellow sweetclover | Melilotus indicus | MEIN2 | Fabaceae | Dicot |
| anoda | Anoda | ANODA | Malvaceae | Dicot |
| antigonon | Antigonon | ANTIG | Polygonaceae | Dicot |
| antlerfern | Ceratopteris | CERAT2 | Parkeriaceae | Fern |
| Appalachian blazing star | Liatris squarrulosa | LISQ2 | Asteraceae | Dicot |
| Appalachian shoestring fern | Vittaria appalachiana | VIAP2 | Vittariaceae | Fern |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apple mint | Mentha suaveolens | MESU5 | Lamiaceae | Dicot |
| apteria | Apteria | APTER | Burmanniaceae | Monocot |
| aquatic milkweed | Asclepias perennis | ASPE | Asclepiadaceae | Dicot |
| arctic reedgrass | Calamagrostis coarctata | CACO71 | Poaceae | Monocot |
| Argentine senna | Senna corymbosa | SECO9 | Fabaceae | Dicot |
| Arkansas dozedaisy | Aphanostephus skirrhobasis | APSK | Asteraceae | Dicot |
| Arkansas dozedaisy | Aphanostephus skirrhobasis var. skirrhobasis | APSKS | Asteraceae | Dicot |
| Arkansas dozedaisy | Aphanostephus skirrhobasis var. thalassius | APSKT | Asteraceae | Dicot |
| Arkansas leastdaisy | Chaetopappa asteroides | CHAS | Asteraceae | Dicot |
| Arkansas leastdaisy | Chaetopappa asteroides var. asteroides | CHASA | Asteraceae | Dicot |
| Arkansas mannagrass | Glyceria arkansana | GLAR | Poaceae | Monocot |
| Arkansas oak | Quercus arkansana | QUAR2 | Fagaceae | Dicot |
| Arkansas sedge | Carex arkansana | CAAR5 | Cyperaceae | Monocot |
| Armenian grape hyacinth | Muscari armeniacum | MUAR5 | Liliaceae | Monocot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| arrasa con todo | Gomphrena serrata | GOSE | Amaranthaceae | Dicot |
| arrow arum | Peltandra | PELTA | Araceae | Monocot |
| arrowfeather threeawn | Aristida purpurascens | ARPU8 | Poaceae | Monocot |
| arrowfeather threeawn | Aristida purpurascens var. purpurascens | ARPUP4 | Poaceae | Monocot |
| arrowfeather threeawn | Aristida purpurascens var. virgata | ARPUV | Poaceae | Monocot |
| arrowgrass | Triglochin | TRIGL | Juncaginaceae | Monocot |
| arrowhead | Sagittaria | SAGIT | Alismataceae | Monocot |
| arrowhead rattlebox | Crotalaria sagittalis | CRSA4 | Fabaceae | Dicot |
| arrowleaf clover | Trifolium vesiculosum | TRVE | Fabaceae | Dicot |
| arrowleaf tearthumb | Polygonum sagittatum | POSA5 | Polygonaceae | Dicot |
| arrowleaf violet | Viola sagittata | VISA2 | Violaceae | Dicot |
| arrowleaf violet | Viola sagittata var. sagittata | VISAS5 | Violaceae | Dicot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| ashy pipewort | Eriocaulon cinereum | ERCI4 | Eriocaulaceae | Monocot |
| ashy sunflower | Helianthus mollis | HEMO2 | Asteraceae | Dicot |
| Asian crabgrass | Digitaria bicornis | DIBI | Poaceae | Monocot |
| Asian netvein hollyfern | Cyrtomium fortunei | CYFO | Dryopteridaceae | Fern |
| Asian spiderflower | Cleome viscosa | CLVI9 | Capparaceae | Dicot |
| Asiatic dayflower | Commelina communis | COCO3 | Commelinaceae | Monocot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| asplenium ladyfern | Athyrium filix-femina ssp. asplenioides | ATFIA2 | Dryopteridaceae | Fern |
| aster | Ionactis | IONAC | Asteraceae | Dicot |
| aster | Eurybia | EURYB | Asteraceae | Dicot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| asthmaweed | Conyza bonariensis | COBO | Asteraceae | Dicot |
| Atlantic camas | Camassia scilloides | CASC5 | Liliaceae | Monocot |
| Atlantic goldenrod | Solidago arguta | SOAR | Asteraceae | Dicot |
| Atlantic goldenrod | Solidago arguta var. caroliniana | SOARC | Asteraceae | Dicot |
| Atlantic pigeonwings | Clitoria mariana | CLMA4 | Fabaceae | Dicot |
| Atlantic poison oak | Toxicodendron pubescens | TOPU2 | Anacardiaceae | Dicot |
| Australian fingergrass | Chloris truncata | CHTR | Poaceae | Monocot |
| autumn bluegrass | Poa autumnalis | POAU | Poaceae | Monocot |
| 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 |
| autumn zephyrlily | Zephyranthes candida | ZECA | Liliaceae | Monocot |
| avens | Geum | GEUM | Rosaceae | Dicot |
| awl-leaf arrowhead | Sagittaria subulata | SASU | Alismataceae | Monocot |
| awlfruit sedge | Carex stipata | CAST5 | Cyperaceae | Monocot |
| awnless beardgrass | Bothriochloa exaristata | BOEX | Poaceae | Monocot |
| axilflower | Mecardonia acuminata | MEAC | Scrophulariaceae | Dicot |
| axilflower | Mecardonia acuminata var. acuminata | MEACA | Scrophulariaceae | Dicot |
| axilflower | Mecardonia acuminata var. microphylla | MEACM | Scrophulariaceae | Dicot |
| Aztec marigold | Tagetes erecta | TAER | Asteraceae | Dicot |
| azure blue sage | Salvia azurea | SAAZ | Lamiaceae | Dicot |
| azure blue sage | Salvia azurea var. azurea | SAAZA | Lamiaceae | Dicot |
| azure bluet | Houstonia caerulea | HOCA4 | Rubiaceae | Dicot |
| baby blue eyes | Nemophila | NEMOP | Hydrophyllaceae | Dicot |
| baby jump-up | Mecardonia procumbens | MEPR2 | Scrophulariaceae | Dicot |
| baccharis | Baccharis | BACCH | Asteraceae | Dicot |
| bagpod | Sesbania vesicaria | SEVE | Fabaceae | Dicot |
| Bahaman aster | Symphyotrichum bahamense | SYBA5 | Asteraceae | Dicot |
| Bahia lovegrass | Eragrostis bahiensis | ERBA | Poaceae | Monocot |
| bahiagrass | Paspalum notatum | PANO2 | Poaceae | Monocot |
| bahiagrass | Paspalum notatum var. latiflorum | PANOL3 | Poaceae | Monocot |
| bahiagrass | Paspalum notatum var. notatum | PANON | Poaceae | Monocot |
| bahiagrass | Paspalum notatum var. saurae | PANOS | Poaceae | Monocot |
| bald bedstraw | Galium orizabense | GAOR2 | Rubiaceae | Dicot |
| bald bedstraw | Galium orizabense ssp. laevicaule | GAORL | Rubiaceae | Dicot |
| bald brome | Bromus racemosus | BRRA2 | Poaceae | Monocot |
| bald cypress | Taxodium | TAXOD | Cupressaceae | Gymnosperm |
| bald cypress | Taxodium distichum | TADI2 | Cupressaceae | Gymnosperm |
| bald spikerush | Eleocharis erythropoda | ELER | Cyperaceae | Monocot |
| Baldwin"s beaksedge | Rhynchospora baldwinii | RHBA | Cyperaceae | Monocot |
| Baldwin"s flatsedge | Cyperus croceus | CYCR6 | Cyperaceae | Monocot |
| Baldwin"s ironweed | Vernonia baldwinii | VEBA | Asteraceae | Dicot |
| Baldwin"s ironweed | Vernonia baldwinii ssp. baldwinii | VEBAB | Asteraceae | Dicot |
| Baldwin"s nutrush | Scleria baldwinii | SCBA2 | Cyperaceae | Monocot |
| Baldwin"s spikerush | Eleocharis baldwinii | ELBA2 | Cyperaceae | Monocot |
| Baldwin"s yelloweyed grass | Xyris baldwiniana | XYBA | Xyridaceae | Monocot |
| balloon vine | Cardiospermum halicacabum | CAHA13 | Sapindaceae | Dicot |
| balloonvine | Cardiospermum | CARDI2 | Sapindaceae | Dicot |
| balm | Melissa | MELIS | Lamiaceae | Dicot |
| balsampear | Momordica charantia | MOCH2 | Cucurbitaceae | Dicot |
| bamboo | Phyllostachys | PHYLL6 | Poaceae | Monocot |
| banana | Musa | MUSA2 | Musaceae | Monocot |
| bandanna of the Everglades | Canna flaccida | CAFL11 | Cannaceae | Monocot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| Barbados lily | Hippeastrum puniceum | HIPU | Liliaceae | Monocot |
| Barbara"s buttons | Marshallia | MARSH | Asteraceae | Dicot |
| barbed rattlesnakeroot | Prenanthes barbata | PRBA | Asteraceae | Dicot |
| barberry hawthorn | Crataegus berberifolia | CRBE2 | Rosaceae | Dicot |
| barbgrass | Hainardia | HAINA | Poaceae | Monocot |
| barbgrass | Hainardia cylindrica | HACY | Poaceae | Monocot |
| barley | Hordeum | HORDE | Poaceae | Monocot |
| barnyardgrass | Echinochloa crus-galli | ECCR | Poaceae | Monocot |
| barrens silky aster | Symphyotrichum pratense | SYPR7 | Asteraceae | Dicot |
| basil | Ocimum | OCIMU | Lamiaceae | Dicot |
| basil beebalm | Monarda clinopodioides | MOCL2 | Lamiaceae | Dicot |
| basketgrass | Oplismenus | OPLIS | Poaceae | Monocot |
| basketgrass | Oplismenus hirtellus | OPHI | Poaceae | Monocot |
| basketgrass | Oplismenus hirtellus ssp. setarius | OPHIS | Poaceae | Monocot |
| basketplant | Callisia fragrans | CAFR6 | Commelinaceae | Monocot |
| basswood | Tilia | TILIA | Tiliaceae | Dicot |
| bastard oak | Quercus sinuata | QUSI | Fagaceae | Dicot |
| bastard oak | Quercus sinuata var. sinuata | QUSIS | Fagaceae | Dicot |
| bastardcabbage | Rapistrum | RAPIS | Brassicaceae | Dicot |
| bauhinia | Bauhinia | BAUHI | Fabaceae | Dicot |
| bay | Persea | PERSE | Lauraceae | Dicot |
| Bay Biscayne creeping-oxeye | Sphagneticola trilobata | SPTR6 | Asteraceae | Dicot |
| bay starvine | Schisandra glabra | SCGL7 | Schisandraceae | Dicot |
| baybean | Canavalia rosea | CARO26 | Fabaceae | Dicot |
| bayberry | Morella | MOREL2 | Myricaceae | Dicot |
| bayhops | Ipomoea pes-caprae | IPPE | Convolvulaceae | Dicot |
| beach creeping oxeye | Pascalia glauca | PAGL9 | Asteraceae | Dicot |
| beach evening primrose | Oenothera drummondii | OEDR | Onagraceae | Dicot |
| beach false foxglove | Agalinis fasciculata | AGFA2 | Scrophulariaceae | Dicot |
| beach morning-glory | Ipomoea imperati | IPIM | Convolvulaceae | Dicot |
| beaked agrimony | Agrimonia rostellata | AGRO3 | Rosaceae | Dicot |
| beaked cornsalad | Valerianella radiata | VARA | Valerianaceae | Dicot |
| beaked panicgrass | Panicum anceps | PAAN | Poaceae | Monocot |
| beaked spikerush | Eleocharis rostellata | ELRO2 | Cyperaceae | 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 grasspink | Calopogon barbatus | CABA | Orchidaceae | Monocot |
| bearded shorthusk | Brachyelytrum erectum | BRER2 | Poaceae | Monocot |
| bearded skeletongrass | Gymnopogon ambiguus | GYAM | Poaceae | Monocot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| beardgrass | Bothriochloa | BOTHR | Poaceae | Monocot |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| beautyberry | Callicarpa | CALLI2 | Verbenaceae | Dicot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| bedstraw | Cruciata | CRUCI2 | Rubiaceae | Dicot |
| bedstraw St. Johnswort | Hypericum galioides | HYGA | Clusiaceae | Dicot |
| beebalm | Monarda | MONAR | Lamiaceae | Dicot |
| beeblossom | Gaura | GAURA | Onagraceae | Dicot |
| beech | Fagus | FAGUS | Fagaceae | Dicot |
| beechdrops | Epifagus | EPIFA | Orobanchaceae | Dicot |
| beechdrops | Epifagus virginiana | EPVI2 | Orobanchaceae | 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 |
| Bejar clover | Trifolium bejariense | TRBE3 | Fabaceae | Dicot |
| belamcanda | Belamcanda | BELAM | Iridaceae | Monocot |
| belladonna lily | Amaryllis belladonna | AMBE3 | Liliaceae | Monocot |
| bellflower | Campanulastrum | CAMPA2 | Campanulaceae | Dicot |
| bellwort | Uvularia | UVULA | Liliaceae | Monocot |
| bent alligator-flag | Thalia geniculata | THGE2 | Marantaceae | Monocot |
| bent sedge | Carex styloflexa | CAST9 | Cyperaceae | Monocot |
| bentawn flatsedge | Cyperus reflexus | CYRE2 | Cyperaceae | Monocot |
| bentgrass | Agrostis | AGROS2 | Poaceae | Monocot |
| Bentham"s pipewort | Eriocaulon benthamii | ERBE11 | Eriocaulaceae | Monocot |
| Berg"s panicgrass | Panicum bergii | PABE4 | Poaceae | Monocot |
| bergia | Bergia | BERGI | Elatinaceae | Dicot |
| Berlandier"s sundrops | Calylophus berlandieri | CABE6 | Onagraceae | Dicot |
| Berlandier"s sundrops | Calylophus berlandieri ssp. berlandieri | CABEB2 | Onagraceae | 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 |
| betonyleaf noseburn | Tragia betonicifolia | TRBE4 | Euphorbiaceae | Dicot |
| Beyrich"s fleabane | Erigeron strigosus var. beyrichii | ERSTB | Asteraceae | Dicot |
| biannual lettuce | Lactuca ludoviciana | LALU | Asteraceae | Dicot |
| big blue lilyturf | Liriope muscari | LIMU6 | Liliaceae | Monocot |
| big bluestem | Andropogon gerardii | ANGE | Poaceae | Monocot |
| big carpetgrass | Axonopus furcatus | AXFU | Poaceae | Monocot |
| big chickweed | Cerastium fontanum ssp. vulgare | CEFOV2 | Caryophyllaceae | Dicot |
| big cordgrass | Spartina cynosuroides | SPCY | Poaceae | Monocot |
| big devils beggartick | Bidens vulgata | BIVU | Asteraceae | Dicot |
| big floatingheart | Nymphoides aquatica | NYAQ | Menyanthaceae | Dicot |
| big sandbur | Cenchrus myosuroides | CEMY | Poaceae | Monocot |
| big yellow velvetleaf | Wissadula amplissima | WIAM | Malvaceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| Bigelow"s amaranth | Amaranthus bigelovii | AMBI | Amaranthaceae | Dicot |
| bigfoot waterclover | Marsilea macropoda | MAMA9 | Marsileaceae | Fern |
| bigfruit hawthorn | Crataegus macrosperma | CRMA3 | Rosaceae | Dicot |
| bighead pygmycudweed | Evax prolifera | EVPR | Asteraceae | Dicot |
| bighead rush | Juncus megacephalus | JUME | Juncaceae | Monocot |
| bigleaf bristlegrass | Setaria megaphylla | SEME6 | Poaceae | Monocot |
| bigleaf magnolia | Magnolia macrophylla | MAMA2 | Magnoliaceae | Dicot |
| bigleaf periwinkle | Vinca major | VIMA | Apocynaceae | Dicot |
| bigleaf snowbell | Styrax grandifolius | STGR4 | Styracaceae | Dicot |
| bignonia | Bignonia | BIGNO | Bignoniaceae | Dicot |
| bigpod sesbania | Sesbania herbacea | SEHE8 | Fabaceae | Dicot |
| bigseed alfalfa dodder | Cuscuta indecora | CUIN | Cuscutaceae | Dicot |
| bigseed dodder | Cuscuta indecora var. neuropetala | CUINN | Cuscutaceae | Dicot |
| bigtop lovegrass | Eragrostis hirsuta | ERHI | Poaceae | Monocot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| bindweed dwarf morning-glory | Evolvulus convolvuloides | EVCO | Convolvulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| birdbill woodoats | Chasmanthium ornithorhynchum | CHOR3 | Poaceae | Monocot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdfoot violet | Viola pedata | VIPE | Violaceae | Dicot |
| birdseed leaf-flower | Phyllanthus pudens | PHPU6 | Euphorbiaceae | Dicot |
| birdwood grass | Cenchrus setiger | CESE10 | Poaceae | Monocot |
| bitter dock | Rumex obtusifolius | RUOB | Polygonaceae | Dicot |
| bitter panicgrass | Panicum amarum | PAAM2 | Poaceae | Monocot |
| bitter panicgrass | Panicum amarum var. amarum | PAAMA3 | Poaceae | Monocot |
| 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 edge sedge | Carex nigromarginata | CANI3 | Cyperaceae | Monocot |
| black elderberry | Sambucus nigra | SANI4 | Caprifoliaceae | Dicot |
| black hickory | Carya texana | CATE9 | Juglandaceae | Dicot |
| black highbush blueberry | Vaccinium fuscatum | VAFU | Ericaceae | Dicot |
| black locust | Robinia pseudoacacia | ROPS | Fabaceae | Dicot |
| black mangrove | Avicennia germinans | AVGE | Verbenaceae | Dicot |
| black medick | Medicago lupulina | MELU | Fabaceae | Dicot |
| black mulberry | Morus nigra | MONI | Moraceae | Dicot |
| black mustard | Brassica nigra | BRNI | Brassicaceae | Dicot |
| black oak | Quercus velutina | QUVE | Fagaceae | 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 |
| blackdisk medick | Medicago orbicularis | MEOR2 | Fabaceae | Dicot |
| blackeyed Susan | Rudbeckia hirta | RUHI2 | Asteraceae | Dicot |
| blackeyed Susan | Rudbeckia hirta var. angustifolia | RUHIA | Asteraceae | Dicot |
| blackeyed Susan | Rudbeckia hirta var. pulcherrima | RUHIP | Asteraceae | Dicot |
| blackfoot quillwort | Isoetes melanopoda | ISME | Isoetaceae | Quillwort |
| blackgum | Nyssa sylvatica | NYSY | Cornaceae | Dicot |
| blackhaw | Viburnum prunifolium | VIPR | Caprifoliaceae | Dicot |
| blackjack oak | Quercus marilandica | QUMA3 | Fagaceae | Dicot |
| blackjack oak | Quercus marilandica var. marilandica | QUMAM2 | Fagaceae | Dicot |
| blackroot | Pterocaulon | PTERO2 | Asteraceae | 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 speargrass | Piptochaetium avenaceum | PIAV | Poaceae | Monocot |
| blacksenna | Seymeria | SEYME | Scrophulariaceae | Dicot |
| blackstem spleenwort | Asplenium resiliens | ASRE | Aspleniaceae | Fern |
| 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 |
| blechum | Blechum | BLECH2 | Acanthaceae | Dicot |
| blessed milkthistle | Silybum marianum | SIMA3 | Asteraceae | Dicot |
| blisterwort | Ranunculus recurvatus | RARE2 | Ranunculaceae | Dicot |
| blisterwort | Ranunculus recurvatus var. recurvatus | RARER2 | Ranunculaceae | Dicot |
| blood panicgrass | Dichanthelium consanguineum | DICO4 | Poaceae | Monocot |
| blood sage | Salvia coccinea | SACO5 | Lamiaceae | Dicot |
| blooddrops | Adonis annua | ADAN | Ranunculaceae | Dicot |
| bloodflower | Asclepias curassavica | ASCU | Asclepiadaceae | Dicot |
| bloodleaf | Iresine | IRESI | Amaranthaceae | Dicot |
| bloodroot | Sanguinaria | SANGU | Papaveraceae | Dicot |
| bloodroot | Sanguinaria canadensis | SACA13 | Papaveraceae | Dicot |
| bloody butcher | Trillium recurvatum | TRRE5 | Liliaceae | Monocot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue fieldmadder | Sherardia arvensis | SHAR2 | Rubiaceae | Dicot |
| 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 horsebalm | Collinsonia serotina | COSE11 | Lamiaceae | Dicot |
| blue sedge | Carex glaucodea | CAGL6 | Cyperaceae | Monocot |
| blue skullcap | Scutellaria lateriflora | SCLA2 | Lamiaceae | Dicot |
| blue skullcap | Scutellaria lateriflora var. lateriflora | SCLAL2 | Lamiaceae | Dicot |
| blue spikemoss | Selaginella uncinata | SEUN2 | Selaginellaceae | Lycopod |
| blue waterhyssop | Bacopa caroliniana | BACA | Scrophulariaceae | Dicot |
| blue waxweed | Cuphea viscosissima | CUVI | Lythraceae | Dicot |
| blue-eyed grass | Sisyrinchium | SISYR | Iridaceae | Monocot |
| blueberry | Vaccinium | VACCI | Ericaceae | Dicot |
| blueberry hawthorn | Crataegus brachyacantha | CRBR | Rosaceae | Dicot |
| bluecrown passionflower | Passiflora caerulea | PACA22 | Passifloraceae | Dicot |
| bluecurls | Trichostema | TRICH9 | Lamiaceae | Dicot |
| blueflower eryngo | Eryngium integrifolium | ERIN6 | Apiaceae | Dicot |
| bluegrass | Poa | POA | Poaceae | Monocot |
| bluehearts | Buchnera | BUCHN | Scrophulariaceae | Dicot |
| bluejack oak | Quercus incana | QUIN | Fagaceae | Dicot |
| bluejacket | Tradescantia ohiensis | TROH | Commelinaceae | Monocot |
| bluejoint panicgrass | Panicum tenerum | PATE3 | Poaceae | Monocot |
| bluestar | Amsonia | AMSON | Apocynaceae | Dicot |
| bluestem | Andropogon | ANDRO2 | Poaceae | Monocot |
| bluestem | Dichanthium | DICHA3 | Poaceae | Monocot |
| bluestem pricklypoppy | Argemone albiflora | ARAL3 | Papaveraceae | Dicot |
| bluestem pricklypoppy | Argemone albiflora ssp. albiflora | ARALA2 | Papaveraceae | Dicot |
| bluestem pricklypoppy | Argemone albiflora ssp. texana | ARALT | Papaveraceae | Dicot |
| bluet | Houstonia | HOUST | Rubiaceae | Dicot |
| bluethread | Burmannia | BURMA | Burmanniaceae | Monocot |
| bluewings | Torenia fournieri | TOFO2 | Scrophulariaceae | Dicot |
| blunt broom sedge | Carex tribuloides | CATR7 | Cyperaceae | Monocot |
| blunt broom sedge | Carex tribuloides var. sangamonensis | CATRS2 | 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 |
| bluntlobe cliff fern | Woodsia obtusa | WOOB2 | Dryopteridaceae | Fern |
| bluntlobe cliff fern | Woodsia obtusa ssp. obtusa | WOOBO | Dryopteridaceae | Fern |
| blutaparon | Blutaparon | BLUTA | Amaranthaceae | Dicot |
| blyxa | Blyxa | BLYXA | Hydrocharitaceae | Monocot |
| boatlily | Tradescantia spathacea | TRSP8 | Commelinaceae | Monocot |
| bog chickweed | Stellaria alsine | STAL4 | Caryophyllaceae | Dicot |
| bog orchid | Habenaria | HABEN | Orchidaceae | Monocot |
| bog rush | Juncus biflorus | JUBI | Juncaceae | Monocot |
| bog smartweed | Polygonum setaceum | POSE6 | Polygonaceae | Dicot |
| bog spicebush | Lindera subcoriacea | LISU8 | Lauraceae | Dicot |
| bog white violet | Viola lanceolata | VILA4 | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. vittata | VILAV | Violaceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| bog yelloweyed grass | Xyris difformis | XYDI | Xyridaceae | Monocot |
| bog yelloweyed grass | Xyris difformis var. difformis | XYDID | Xyridaceae | Monocot |
| bogbutton | Sclerolepis | SCLER5 | Asteraceae | Dicot |
| bogbutton | Lachnocaulon | LACHN | Eriocaulaceae | Monocot |
| bogmat | Wolffiella | WOLFF2 | Lemnaceae | Monocot |
| Boott"s goldenrod | Solidago arguta var. boottii | SOARB | Asteraceae | Dicot |
| Boott"s sedge | Carex picta | CAPI5 | Cyperaceae | Monocot |
| Bosc"s mille graines | Oldenlandia boscii | OLBO | Rubiaceae | Dicot |
| Bosc"s panicgrass | Dichanthelium boscii | DIBO2 | Poaceae | Monocot |
| Boston swordfern | Nephrolepis exaltata | NEEX | Dryopteridaceae | Fern |
| Boston swordfern | Nephrolepis exaltata ssp. exaltata | NEEXE | Dryopteridaceae | Fern |
| bottle gourd | Lagenaria siceraria | LASI | Cucurbitaceae | Dicot |
| bottlebrush | Callistemon | CALLI12 | Myrtaceae | Dicot |
| bottomland aster | Symphyotrichum ontarionis | SYON2 | Asteraceae | Dicot |
| bottomland post oak | Quercus similis | QUSI2 | Fagaceae | Dicot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| bouquet mudplantain | Heteranthera multiflora | HEMU5 | Pontederiaceae | Monocot |
| Bourbon rose | Rosa ×borboniana | ROBO3 | Rosaceae | Dicot |
| bowlesia | Bowlesia | BOWLE | Apiaceae | Dicot |
| boxelder | Acer negundo | ACNE2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. negundo | ACNEN | Aceraceae | Dicot |
| boxelder | Acer negundo var. texanum | ACNET | Aceraceae | Dicot |
| Boykin"s clusterpea | Dioclea multiflora | DIMU | Fabaceae | Dicot |
| Boykin"s milkwort | Polygala boykinii | POBO4 | Polygalaceae | Dicot |
| Boykin"s milkwort | Polygala boykinii var. boykinii | POBOB3 | Polygalaceae | Dicot |
| brachychiton | Brachychiton | BRACH13 | Sterculiaceae | Dicot |
| brackenfern | Pteridium | PTERI | Dennstaedtiaceae | Fern |
| bractspike | Yeatesia | YEATE | Acanthaceae | Dicot |
| Bradley"s spleenwort | Asplenium bradleyi | ASBR2 | Aspleniaceae | Fern |
| brake fern | Pteris | PTERI2 | Pteridaceae | Fern |
| branched blackberry | Rubus suus | RUSU4 | Rosaceae | Dicot |
| branched bur-reed | Sparganium androcladum | SPAN | Sparganiaceae | Monocot |
| branched centaury | Centaurium pulchellum | CEPU3 | Gentianaceae | Dicot |
| branched foldwing | Dicliptera brachiata | DIBR2 | Acanthaceae | Dicot |
| branched hedgehyssop | Gratiola ramosa | GRRA | Scrophulariaceae | Dicot |
| branched scouringrush | Equisetum ramosissimum | EQRA | Equisetaceae | Horsetail |
| branched tearthumb | Polygonum meisnerianum | POME4 | Polygonaceae | Dicot |
| branched tearthumb | Polygonum meisnerianum var. beyrichianum | POMEB | Polygonaceae | Dicot |
| brasenia | Brasenia | BRASE | Cabombaceae | Dicot |
| Braun"s spikemoss | Selaginella braunii | SEBR3 | Selaginellaceae | Lycopod |
| Brazilian bayhops | Ipomoea pes-caprae ssp. brasiliensis | IPPEB | Convolvulaceae | Dicot |
| Brazilian cat"s ear | Hypochaeris brasiliensis | HYBR5 | Asteraceae | Dicot |
| Brazilian satintail | Imperata brasiliensis | IMBR | Poaceae | Monocot |
| Brazilian vervain | Verbena brasiliensis | VEBR2 | Verbenaceae | Dicot |
| Brazilian waterhyssop | Bacopa egensis | BAEG | Scrophulariaceae | Dicot |
| Brazilian watermeal | Wolffia brasiliensis | WOBR | Lemnaceae | Monocot |
| Brazilian waterweed | Egeria densa | EGDE | Hydrocharitaceae | Monocot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| bridalwreath spirea | Spiraea prunifolia | SPPR | Rosaceae | Dicot |
| bright green spikerush | Eleocharis olivacea | ELOL | Cyperaceae | Monocot |
| bright green spikerush | Eleocharis olivacea var. olivacea | ELOLO | Cyperaceae | Monocot |
| bristle fern | Trichomanes | TRICH5 | Hymenophyllaceae | Fern |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristleleaf chaffhead | Carphephorus pseudoliatris | CAPS5 | Asteraceae | Dicot |
| bristleleaf pricklyleaf | Thymophylla tenuiloba | THTE7 | Asteraceae | Dicot |
| bristleleaf pricklyleaf | Thymophylla tenuiloba var. tenuiloba | THTET | Asteraceae | Dicot |
| bristlemallow | Modiola | MODIO | Malvaceae | Dicot |
| bristleseed sandspurry | Spergularia echinosperma | SPEC | Caryophyllaceae | Dicot |
| bristly buttercup | Ranunculus hispidus | RAHI | Ranunculaceae | Dicot |
| bristly buttercup | Ranunculus hispidus var. nitidus | RAHIN | Ranunculaceae | Dicot |
| bristly dogstail grass | Cynosurus echinatus | CYEC | Poaceae | Monocot |
| bristly flatsedge | Cyperus hystricinus | CYHY | Cyperaceae | Monocot |
| bristly greenbrier | Smilax tamnoides | SMTA2 | Smilacaceae | Monocot |
| bristly locust | Robinia hispida | ROHI | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. hispida | ROHIH | Fabaceae | Dicot |
| bristly scaleseed | Spermolepis echinata | SPEC2 | Apiaceae | Dicot |
| bristlystalked sedge | Carex leptalea | CALE10 | Cyperaceae | Monocot |
| British soldier lichen | Cladonia cristatella | CLCR2 | Cladoniaceae | Lichen |
| brittle waternymph | Najas minor | NAMI | Najadaceae | Monocot |
| brittlestem hempnettle | Galeopsis tetrahit | GATE2 | Lamiaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit var. tetrahit | GATET2 | Lamiaceae | Dicot |
| Britton"s sedge | Carex tetrastachya | CATE29 | Cyperaceae | Monocot |
| Britton"s spikerush | Eleocharis brittonii | ELBR | Cyperaceae | Monocot |
| Britton"s wild petunia | Ruellia caerulea | RUCA19 | Acanthaceae | Dicot |
| broad beechfern | Phegopteris hexagonoptera | PHHE11 | Thelypteridaceae | Fern |
| broad looseflower sedge | Carex laxiflora | CALA19 | Cyperaceae | Monocot |
| broad looseflower sedge | Carex laxiflora var. serrulata | CALAS | Cyperaceae | Monocot |
| broadfruit horned beaksedge | Rhynchospora careyana | RHCA13 | Cyperaceae | Monocot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf Barbara"s buttons | Marshallia trinervia | MATR2 | Asteraceae | Dicot |
| broadleaf carpetgrass | Axonopus compressus | AXCO | Poaceae | 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 signalgrass | Urochloa platyphylla | URPL2 | Poaceae | Monocot |
| broadleaf spurge | Euphorbia platyphyllos | EUPL | Euphorbiaceae | Dicot |
| broadleaf wild leek | Allium ampeloprasum | ALAM | Liliaceae | Monocot |
| broadwing sedge | Carex alata | CAAL3 | Cyperaceae | Monocot |
| brome | Bromus | BROMU | Poaceae | Monocot |
| brome fescue | Vulpia bromoides | VUBR | Poaceae | Monocot |
| brome-like sedge | Carex bromoides | CABR14 | Cyperaceae | Monocot |
| brome-like sedge | Carex bromoides ssp. bromoides | CABRB6 | Cyperaceae | Monocot |
| brook crowngrass | Paspalum acuminatum | PAAC4 | Poaceae | Monocot |
| brookweed | Samolus | SAMOL | Primulaceae | 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 |
| broussonetia | Broussonetia | BROUS | Moraceae | Dicot |
| brown flatsedge | Cyperus fuscus | CYFU3 | Cyperaceae | Monocot |
| brown mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| Browne"s blechum | Blechum pyramidatum | BLPY | Acanthaceae | Dicot |
| Browne"s savory | Clinopodium brownei | CLBR7 | Lamiaceae | Dicot |
| browneyed Susan | Rudbeckia triloba | RUTR2 | Asteraceae | Dicot |
| browneyed Susan | Rudbeckia triloba var. triloba | RUTRT | Asteraceae | Dicot |
| brownhair lacefern | Ctenitis submarginalis | CTSU2 | Dryopteridaceae | Fern |
| brownish beaksedge | Rhynchospora capitellata | RHCA12 | Cyperaceae | Monocot |
| brownseed paspalum | Paspalum plicatulum | PAPL3 | Poaceae | Monocot |
| browntop | Microstegium | MICRO7 | Poaceae | Monocot |
| browntop millet | Urochloa ramosa | URRA | Poaceae | Monocot |
| browntop signalgrass | Urochloa fusca | URFU2 | Poaceae | Monocot |
| buckeye | Aesculus | AESCU | Hippocastanaceae | Dicot |
| buckeye | Aesculus ×bushii | AEBU | Hippocastanaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckthorn bully | Sideroxylon lycioides | SILY | Sapotaceae | Dicot |
| buckwheat | Fagopyrum | FAGOP2 | Polygonaceae | Dicot |
| buckwheat | Fagopyrum esculentum | FAES2 | Polygonaceae | Dicot |
| buckwheat | Eriogonum | ERIOG | Polygonaceae | Dicot |
| buckwheat tree | Cliftonia monophylla | CLMO2 | Cyrillaceae | Dicot |
| buckwheat vine | Brunnichia | BRUNN | Polygonaceae | Dicot |
| buffalo clover | Trifolium reflexum | TRRE2 | Fabaceae | Dicot |
| buffalobur nightshade | Solanum rostratum | SORO | Solanaceae | Dicot |
| buffalograss | Bouteloua dactyloides | BODA2 | Poaceae | Monocot |
| buffelgrass | Pennisetum ciliare | PECI | Poaceae | Monocot |
| bugle | Ajuga | AJUGA | Lamiaceae | Dicot |
| buglossoides | Buglossoides | BUGLO | Boraginaceae | Dicot |
| bulbous adderstongue | Ophioglossum crotalophoroides | OPCR | Ophioglossaceae | Fern |
| bulbous adderstongue | Ophioglossum crotalophoroides var. crotalophoroides | OPCRC | Ophioglossaceae | Fern |
| bulbous bittercress | Cardamine bulbosa | CABU3 | Brassicaceae | Dicot |
| bulbous bluegrass | Poa bulbosa | POBU | Poaceae | Monocot |
| bulbous woodrush | Luzula bulbosa | LUBU | Juncaceae | Monocot |
| bull crowngrass | Paspalum boscianum | PABO3 | Poaceae | Monocot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bulltongue arrowhead | Sagittaria lancifolia | SALA | Alismataceae | Monocot |
| bulltongue arrowhead | Sagittaria lancifolia ssp. media | SALAM2 | Alismataceae | Monocot |
| bully | Sideroxylon | SIDER2 | Sapotaceae | Dicot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bulrush | Oxycaryum | OXYCA | Cyperaceae | Monocot |
| bulrush | Isolepis | ISOLE | Cyperaceae | Monocot |
| bunched beaksedge | Rhynchospora cephalantha | RHCE | Cyperaceae | Monocot |
| bundleflower | Desmanthus | DESMA | Fabaceae | Dicot |
| bupleurum | Bupleurum | BUPLE | Apiaceae | Dicot |
| bur bristlegrass | Setaria adhaerens | SEAD | Poaceae | Monocot |
| 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. macrocarpa | QUMAM | Fagaceae | Dicot |
| bur-reed | Sparganium | SPARG | Sparganiaceae | Monocot |
| burclover | Medicago polymorpha | MEPO3 | Fabaceae | Dicot |
| burdock | Arctium | ARCTI | Asteraceae | Dicot |
| burdock clover | Trifolium lappaceum | TRLA18 | Fabaceae | Dicot |
| burhead | Echinodorus | ECHIN6 | Alismataceae | Monocot |
| burningbush | Euonymus atropurpureus | EUAT5 | Celastraceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burnweed | Erechtites | ERECH | Asteraceae | Dicot |
| burrweed | Gymnostyles | GYMNO7 | Asteraceae | Dicot |
| burrweed | Soliva | SOLIV | Asteraceae | Dicot |
| bursting-heart | Euonymus americanus | EUAM9 | Celastraceae | Dicot |
| bush morning-glory | Ipomoea ×leucantha | IPLE4 | Convolvulaceae | Dicot |
| Bush"s goosefoot | Chenopodium berlandieri var. bushianum | CHBEB3 | Chenopodiaceae | Dicot |
| Bush"s sedge | Carex bushii | CABU5 | Cyperaceae | Monocot |
| Bush"s umbrella-sedge | Fuirena bushii | FUBU | Cyperaceae | Monocot |
| bushbean | Macroptilium | MACRO4 | Fabaceae | Dicot |
| bushclover dodder | Cuscuta pentagona var. glabrior | CUPEG | Cuscutaceae | Dicot |
| bushkiller | Cayratia japonica | CAJA7 | Vitaceae | Dicot |
| bushmint | Hyptis | HYPTI | Lamiaceae | Dicot |
| bushy bluestem | Andropogon glomeratus | ANGL2 | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. glomeratus | ANGLG2 | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. hirsutior | ANGLH | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. pumilus | ANGLP | Poaceae | Monocot |
| bushy goldentop | Euthamia leptocephala | EULE4 | Asteraceae | Dicot |
| bushy knotweed | Polygonum ramosissimum | PORA3 | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. prolificum | PORAP | Polygonaceae | Dicot |
| bushy knotweed | Polygonum ramosissimum var. ramosissimum | PORAR | Polygonaceae | Dicot |
| bushy seaside tansy | Borrichia frutescens | BOFR | Asteraceae | Dicot |
| bushy St. Johnswort | Hypericum densiflorum | HYDE | Clusiaceae | Dicot |
| Butler"s sandparsley | Ammoselinum butleri | AMBU | Apiaceae | 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 |
| butterfly pea | Centrosema | CENTR2 | Fabaceae | Dicot |
| butterflybush | Buddleja | BUDDL2 | Buddlejaceae | Dicot |
| butterweed | Packera glabella | PAGL17 | Asteraceae | Dicot |
| butterwort | Pinguicula | PINGU | Lentibulariaceae | Dicot |
| button burrweed | Gymnostyles anthemifolia | GYAN | Asteraceae | Dicot |
| button eryngo | Eryngium yuccifolium | ERYU | Apiaceae | Dicot |
| button eryngo | Eryngium yuccifolium var. synchaetum | ERYUS | Apiaceae | Dicot |
| button eryngo | Eryngium yuccifolium var. yuccifolium | ERYUY | Apiaceae | Dicot |
| buttonbush | Cephalanthus | CEPHA | Rubiaceae | Dicot |
| buttonbush flatsedge | Cyperus cephalanthus | CYCE | Cyperaceae | Monocot |
| buttonweed | Diodia | DIODI | Rubiaceae | Dicot |
| cabbage | Brassica oleracea | BROL | Brassicaceae | Dicot |
| cabbage palmetto | Sabal palmetto | SAPA | Arecaceae | Monocot |
| cactus apple | Opuntia engelmannii | OPEN3 | Cactaceae | Dicot |
| Caddo false foxglove | Agalinis caddoensis | AGCA8 | Scrophulariaceae | Dicot |
| Caesarweed | Urena lobata | URLO | Malvaceae | Dicot |
| caladium | Caladium | CALAD | Araceae | Monocot |
| calamus | Acorus calamus | ACCA4 | Acoraceae | Monocot |
| Caley pea | Lathyrus hirsutus | LAHI2 | Fabaceae | Dicot |
| calibrachoa | Calibrachoa | CALIB | Solanaceae | Dicot |
| calico aster | Symphyotrichum lateriflorum | SYLA4 | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. lateriflorum | SYLAL7 | Asteraceae | Dicot |
| California bulrush | Schoenoplectus californicus | SCCA11 | Cyperaceae | Monocot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| California plantain | Plantago hookeriana | PLHO | Plantaginaceae | Dicot |
| California poppy | Eschscholzia | ESCHS | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica | ESCA2 | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica ssp. californica | ESCAC | Papaveraceae | Dicot |
| Callery pear | Pyrus calleryana | PYCA80 | Rosaceae | Dicot |
| caltrop | Kallstroemia | KALLS | Zygophyllaceae | Dicot |
| calycocarpum | Calycocarpum | CALYC2 | Menispermaceae | Dicot |
| calyptocarpus | Calyptocarpus | CALYP2 | Asteraceae | Dicot |
| camas | Camassia | CAMAS | Liliaceae | Monocot |
| Campernelle jonquil | Narcissus ×odorus | NAOD | Liliaceae | Monocot |
| camphor daisy | Rayjacksonia phyllocephala | RAPH2 | Asteraceae | Dicot |
| camphor pluchea | Pluchea camphorata | PLCA7 | Asteraceae | Dicot |
| camphortree | Cinnamomum camphora | CICA | Lauraceae | Dicot |
| camphorweed | Heterotheca subaxillaris | HESU3 | Asteraceae | Dicot |
| camphorweed | Pluchea | PLUCH | Asteraceae | Dicot |
| campion | Lychnis | LYCHN | Caryophyllaceae | Dicot |
| campsis | Campsis | CAMPS | Bignoniaceae | Dicot |
| Canada bluegrass | Poa compressa | POCO | Poaceae | Monocot |
| Canada cocklebur | Xanthium strumarium var. canadense | XASTC | Asteraceae | Dicot |
| Canada germander | Teucrium canadense | TECA3 | Lamiaceae | Dicot |
| Canada germander | Teucrium canadense var. canadense | TECAC | Lamiaceae | Dicot |
| Canada goldenrod | Solidago altissima | SOAL6 | Asteraceae | Dicot |
| Canada lettuce | Lactuca canadensis | LACA | Asteraceae | Dicot |
| Canada spikesedge | Eleocharis geniculata | ELGE | Cyperaceae | Monocot |
| Canada toadflax | Nuttallanthus canadensis | NUCA | Scrophulariaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis | SACA15 | Apiaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis var. canadensis | SACAC2 | Apiaceae | Dicot |
| Canadian clearweed | Pilea pumila var. pumila | PIPUP | Urticaceae | Dicot |
| Canadian clearweed | Pilea pumila | PIPU2 | Urticaceae | 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 horseweed | Conyza canadensis var. pusilla | COCAP3 | 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 wildginger | Asarum canadense | ASCA | Aristolochiaceae | Dicot |
| Canadian woodnettle | Laportea canadensis | LACA3 | Urticaceae | Dicot |
| Canary Island tamarisk | Tamarix canariensis | TACA9 | Tamaricaceae | Dicot |
| canary violet | Viola ×primulifolia | VIPR4 | Violaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| Canby"s bulrush | Schoenoplectus etuberculatus | SCET2 | Cyperaceae | Monocot |
| cancerwort | Kickxia | KICKX | Scrophulariaceae | Dicot |
| candyroot | Polygala nana | PONA2 | Polygalaceae | Dicot |
| cane | Arundinaria | ARUND2 | Poaceae | Monocot |
| canebrake sedge | Carex austrodeflexa | CAAU24 | Cyperaceae | Monocot |
| canna | Canna | CANNA2 | Cannaceae | Monocot |
| canna lily | Canna ×generalis | CAGE3 | Cannaceae | Monocot |
| cantaloupe | Cucumis melo | CUME | Cucurbitaceae | Dicot |
| Cape leadwort | Plumbago auriculata | PLAU6 | Plumbaginaceae | Dicot |
| capillary hairsedge | Bulbostylis ciliatifolia | BUCI | Cyperaceae | Monocot |
| capillary hairsedge | Bulbostylis ciliatifolia var. ciliatifolia | BUCIC2 | Cyperaceae | Monocot |
| capillary hairsedge | Bulbostylis ciliatifolia var. coarctata | BUCIC | Cyperaceae | Monocot |
| capsella | Capsella | CAPSE | Brassicaceae | Dicot |
| caraway | Carum carvi | CACA19 | Apiaceae | Dicot |
| cardinalflower | Lobelia cardinalis | LOCA2 | Campanulaceae | Dicot |
| carelessweed | Amaranthus palmeri | AMPA | Amaranthaceae | Dicot |
| Caribbean fingergrass | Eustachys paspaloides | EUPA27 | Poaceae | Monocot |
| Caribbean fingergrass | Eustachys paspaloides ssp. caribaea | EUPAC | Poaceae | Monocot |
| Carolina anemone | Anemone caroliniana | ANCA9 | Ranunculaceae | Dicot |
| Carolina ash | Fraxinus caroliniana | FRCA3 | Oleaceae | Dicot |
| Carolina basswood | Tilia americana var. caroliniana | TIAMC | Tiliaceae | Dicot |
| Carolina bristlemallow | Modiola caroliniana | MOCA | Malvaceae | Dicot |
| Carolina buckthorn | Frangula caroliniana | FRCA13 | Rhamnaceae | Dicot |
| Carolina canarygrass | Phalaris caroliniana | PHCA6 | Poaceae | Monocot |
| Carolina clover | Trifolium carolinianum | TRCA6 | Fabaceae | Dicot |
| Carolina coralbead | Cocculus carolinus | COCA | Menispermaceae | Dicot |
| Carolina crownbeard | Verbesina walteri | VEWA | Asteraceae | Dicot |
| Carolina dayflower | Commelina caroliniana | COCA17 | Commelinaceae | Monocot |
| Carolina desert-chicory | Pyrrhopappus carolinianus | PYCA2 | Asteraceae | Dicot |
| Carolina desert-thorn | Lycium carolinianum | LYCA2 | Solanaceae | Dicot |
| Carolina desert-thorn | Lycium carolinianum var. quadrifidum | LYCAQ | Solanaceae | Dicot |
| Carolina draba | Draba reptans | DRRE2 | Brassicaceae | Dicot |
| Carolina elephantsfoot | Elephantopus carolinianus | ELCA3 | Asteraceae | Dicot |
| Carolina false vervain | Stylodon carneus | STCA6 | Verbenaceae | Dicot |
| Carolina fanwort | Cabomba caroliniana | CACA | Cabombaceae | Dicot |
| Carolina fanwort | Cabomba caroliniana var. caroliniana | CACAC4 | Cabombaceae | Dicot |
| Carolina fimbry | Fimbristylis caroliniana | FICA3 | Cyperaceae | Monocot |
| Carolina fluffgrass | Tridens carolinianus | TRCA4 | Poaceae | Monocot |
| Carolina foxtail | Alopecurus carolinianus | ALCA4 | Poaceae | Monocot |
| Carolina frostweed | Helianthemum carolinianum | HECA4 | Cistaceae | Dicot |
| Carolina geranium | Geranium carolinianum | GECA5 | Geraniaceae | Dicot |
| Carolina geranium | Geranium carolinianum var. carolinianum | GECAC4 | Geraniaceae | Dicot |
| Carolina grasswort | Lilaeopsis carolinensis | LICA31 | Apiaceae | Dicot |
| Carolina holly | Ilex ambigua | ILAM | Aquifoliaceae | Dicot |
| Carolina horsenettle | Solanum carolinense | SOCA3 | Solanaceae | Dicot |
| Carolina horsenettle | Solanum carolinense var. carolinense | SOCAC4 | Solanaceae | Dicot |
| Carolina indigo | Indigofera caroliniana | INCA | Fabaceae | Dicot |
| Carolina larkspur | Delphinium carolinianum | DECA3 | Ranunculaceae | Dicot |
| Carolina larkspur | Delphinium carolinianum ssp. carolinianum | DECAC3 | Ranunculaceae | Dicot |
| Carolina larkspur | Delphinium carolinianum ssp. vimineum | DECAV | Ranunculaceae | Dicot |
| Carolina laurelcherry | Prunus caroliniana | PRCA | Rosaceae | Dicot |
| Carolina leaf-flower | Phyllanthus caroliniensis | PHCA9 | Euphorbiaceae | Dicot |
| Carolina leaf-flower | Phyllanthus caroliniensis ssp. caroliniensis | PHCAC | Euphorbiaceae | Dicot |
| Carolina lily | Lilium michauxii | LIMI | Liliaceae | Monocot |
| Carolina mosquitofern | Azolla caroliniana | AZCA | Azollaceae | Fern |
| Carolina nutrush | Scleria pauciflora var. caroliniana | SCPAC | Cyperaceae | Monocot |
| Carolina ponysfoot | Dichondra carolinensis | DICA3 | Convolvulaceae | Dicot |
| Carolina puccoon | Lithospermum caroliniense | LICA13 | Boraginaceae | Dicot |
| Carolina puccoon | Lithospermum caroliniense var. caroliniense | LICAC8 | Boraginaceae | Dicot |
| Carolina redroot | Lachnanthes caroliana | LACA5 | Haemodoraceae | Monocot |
| Carolina rose | Rosa carolina | ROCA4 | Rosaceae | Dicot |
| Carolina rose | Rosa carolina var. carolina | ROCAC | Rosaceae | Dicot |
| Carolina sedge | Carex caroliniana | CACA15 | Cyperaceae | Monocot |
| Carolina vetch | Vicia caroliniana | VICA2 | Fabaceae | Dicot |
| Carolina violet | Viola villosa | VIVI3 | Violaceae | Dicot |
| Carolina wild petunia | Ruellia caroliniensis | RUCA4 | Acanthaceae | Dicot |
| Carolina wild petunia | Ruellia caroliniensis ssp. caroliniensis | RUCAC2 | Acanthaceae | Dicot |
| Carolina wild petunia | Ruellia caroliniensis ssp. caroliniensis var. caroliniensis | RUCAC4 | Acanthaceae | Dicot |
| Carolina wild petunia | Ruellia caroliniensis ssp. ciliosa | RUCAC | Acanthaceae | Dicot |
| Carolina wild petunia | Ruellia caroliniensis ssp. ciliosa var. cinerascens | RUCAC5 | Acanthaceae | Dicot |
| Carolina woodrush | Luzula acuminata ssp. carolinae | LUACC2 | Juncaceae | Monocot |
| Carolina woollywhite | Hymenopappus scabiosaeus | HYSC | Asteraceae | Dicot |
| Carolina woollywhite | Hymenopappus scabiosaeus var. scabiosaeus | HYSCS | Asteraceae | Dicot |
| Carolina yelloweyed grass | Xyris caroliniana | XYCA | Xyridaceae | Monocot |
| Carpenter"s groundcherry | Physalis carpenteri | PHCA16 | Solanaceae | Dicot |
| carpenter"s square | Scrophularia marilandica | SCMA2 | Scrophulariaceae | Dicot |
| carpet burrweed | Gymnostyles stolonifera | GYST | Asteraceae | Dicot |
| carpetgrass | Axonopus | AXONO | Poaceae | Monocot |
| carpetweed | Mollugo | MOLLU | Molluginaceae | Dicot |
| carpgrass | Arthraxon | ARTHR | Poaceae | Monocot |
| carretilla | Diodia dasycephala | DIDA | Rubiaceae | Dicot |
| carum | Carum | CARUM | Apiaceae | Dicot |
| cassava | Manihot | MANIH | Euphorbiaceae | Dicot |
| castorbean | Ricinus communis | RICO3 | Euphorbiaceae | Dicot |
| cat greenbrier | Smilax glauca | SMGL | Smilacaceae | Monocot |
| cat"s ear | Hypochaeris | HYPOC | Asteraceae | Dicot |
| catalpa | Catalpa | CATAL | Bignoniaceae | Dicot |
| catbird grape | Vitis palmata | VIPA7 | Vitaceae | Dicot |
| catchfly | Silene | SILEN | Caryophyllaceae | Dicot |
| catchfly grass | Leersia lenticularis | LELE2 | Poaceae | Monocot |
| catchfly prairie gentian | Eustoma exaltatum | EUEX5 | Gentianaceae | Dicot |
| catchfly prairie gentian | Eustoma exaltatum ssp. exaltatum | EUEXE2 | Gentianaceae | Dicot |
| catclawvine | Macfadyena unguis-cati | MAUN3 | Bignoniaceae | Dicot |
| catnip | Nepeta | NEPET | Lamiaceae | Dicot |
| catnip | Nepeta cataria | NECA2 | Lamiaceae | Dicot |
| cattail | Typha | TYPHA | Typhaceae | Monocot |
| cattail grass | Setaria pumila ssp. pallidefusca | SEPUP3 | Poaceae | Monocot |
| cattail sedge | Carex typhina | CATY | Cyperaceae | Monocot |
| Caucasian bluestem | Bothriochloa bladhii | BOBL | Poaceae | Monocot |
| cayenne pepper | Capsicum annuum | CAAN4 | Solanaceae | Dicot |
| cayenne pepper | Capsicum annuum var. annuum | CAANA4 | Solanaceae | Dicot |
| cayenne pepper | Capsicum annuum var. glabriusculum | CAANG | Solanaceae | Dicot |
| cayratia | Cayratia | CAYRA | Vitaceae | Dicot |
| ceanothus | Ceanothus | CEANO | Rhamnaceae | Dicot |
| cedar elm | Ulmus crassifolia | ULCR | Ulmaceae | Dicot |
| cedarglade St. Johnswort | Hypericum frondosum | HYFR | Clusiaceae | Dicot |
| celery | Apium | APIUM | Apiaceae | Dicot |
| centaury | Centaurium | CENTA2 | Gentianaceae | Dicot |
| centella | Centella | CENTE | Apiaceae | Dicot |
| centipede grass | Eremochloa | EREMO2 | Poaceae | Monocot |
| centipede grass | Eremochloa ophiuroides | EROP | Poaceae | Monocot |
| cereal rye | Secale cereale | SECE | Poaceae | Monocot |
| Ceylon hound"s tongue | Cynoglossum furcatum | CYFU8 | Boraginaceae | Dicot |
| Ceylon swamplily | Crinum zeylanicum | CRZE | Liliaceae | Monocot |
| chaff flower | Achyranthes | ACHYR2 | Amaranthaceae | Dicot |
| chaffhead | Carphephorus | CARPH | Asteraceae | Dicot |
| chaffseed | Schwalbea americana | SCAM | Scrophulariaceae | Dicot |
| chaffweed | Anagallis minima | ANMI4 | Primulaceae | Dicot |
| chainfern | Woodwardia | WOODW | Blechnaceae | Fern |
| chairmaker"s bulrush | Schoenoplectus americanus | SCAM6 | Cyperaceae | Monocot |
| chalk maple | Acer leucoderme | ACLE | Aceraceae | Dicot |
| chalky bluestem | Andropogon capillipes | ANCA4 | Poaceae | Monocot |
| chamaelirium | Chamaelirium | CHAMA6 | Liliaceae | Monocot |
| chamber bitter | Phyllanthus urinaria | PHUR | Euphorbiaceae | Dicot |
| chameleon | Houttuynia cordata | HOCO3 | Saururaceae | Dicot |
| chamomile | Anthemis | ANTHE | Asteraceae | Dicot |
| changing forget-me-not | Myosotis discolor | MYDI | Boraginaceae | Dicot |
| Chapman"s arrowhead | Sagittaria graminea var. chapmanii | SAGRC2 | Alismataceae | Monocot |
| Chapman"s beaksedge | Rhynchospora chapmanii | RHCH3 | Cyperaceae | Monocot |
| Chapman"s bluegrass | Poa chapmaniana | POCH2 | Poaceae | Monocot |
| Chapman"s milkwort | Polygala chapmanii | POCH5 | Polygalaceae | Dicot |
| Chapman"s tridens | Tridens flavus var. chapmanii | TRFLC | Poaceae | Monocot |
| charlock mustard | Sinapis arvensis | SIAR4 | Brassicaceae | Dicot |
| chastetree | Vitex | VITEX | Verbenaceae | Dicot |
| Chattahoochee false foxglove | Agalinis plukenetii | AGPL | Scrophulariaceae | Dicot |
| chayote | Sechium edule | SEED | Cucurbitaceae | Dicot |
| cheatgrass | Bromus tectorum | BRTE | Poaceae | Monocot |
| checkered jointtail grass | Coelorachis tessellata | COTE5 | Poaceae | Monocot |
| cheeseweed mallow | Malva parviflora | MAPA5 | Malvaceae | Dicot |
| Cherokee rose | Rosa laevigata | ROLA | Rosaceae | Dicot |
| Cherokee sedge | Carex cherokeensis | CACH3 | Cyperaceae | Monocot |
| cherrybark oak | Quercus pagoda | QUPA5 | Fagaceae | Dicot |
| chervil | Chaerophyllum | CHAER | Apiaceae | Dicot |
| chervil | Anthriscus | ANTHR | Apiaceae | Dicot |
| chestnut | Castanea | CASTA | Fagaceae | Dicot |
| chestnut | Castanea ×neglecta | CANE7 | Fagaceae | Dicot |
| chestnut oak | Quercus montana | QUMO4 | Fagaceae | Dicot |
| Chickasaw plum | Prunus angustifolia | PRAN3 | Rosaceae | Dicot |
| Chickasaw plum | Prunus angustifolia var. angustifolia | PRANA | Rosaceae | Dicot |
| chickenclaws | Sarcocornia perennis | SAPE11 | Chenopodiaceae | Dicot |
| chickenspike | Sphenoclea zeylanica | SPZE | Sphenocleaceae | Dicot |
| chicory | Cichorium | CICHO | Asteraceae | Dicot |
| chicory | Cichorium intybus | CIIN | Asteraceae | Dicot |
| childing pink | Petrorhagia prolifera | PEPR4 | Caryophyllaceae | Dicot |
| Chinaberrytree | Melia azedarach | MEAZ | Meliaceae | Dicot |
| chinchweed | Pectis | PECTI | Asteraceae | Dicot |
| Chinese chastetree | Vitex negundo | VINE2 | Verbenaceae | Dicot |
| Chinese chastetree | Vitex negundo var. intermedia | VINEI | Verbenaceae | Dicot |
| Chinese chastetree | Vitex negundo var. negundo | VINEN | Verbenaceae | Dicot |
| Chinese elm | Ulmus parvifolia | ULPA | Ulmaceae | Dicot |
| Chinese fir | Cunninghamia lanceolata | CULA | Cupressaceae | Gymnosperm |
| Chinese grass | Boehmeria nivea | BONI2 | Urticaceae | Dicot |
| Chinese parasoltree | Firmiana simplex | FISI2 | Sterculiaceae | Dicot |
| Chinese privet | Ligustrum sinense | LISI | Oleaceae | Dicot |
| Chinese silvergrass | Miscanthus sinensis | MISI | Poaceae | Monocot |
| Chinese tallow | Triadica | TRIAD2 | Euphorbiaceae | Dicot |
| Chinese tallow | Triadica sebifera | TRSE6 | Euphorbiaceae | Dicot |
| Chinese thorn-apple | Datura quercifolia | DAQU | Solanaceae | Dicot |
| Chinese white poplar | Populus tomentosa | POTO7 | Salicaceae | Dicot |
| Chinese wingnut | Pterocarya stenoptera | PTST80 | Juglandaceae | Dicot |
| Chinese wisteria | Wisteria sinensis | WISI | Fabaceae | Dicot |
| Chinese yam | Dioscorea oppositifolia | DIOP | Dioscoreaceae | Monocot |
| chinkapin | Castanea pumila | CAPU9 | Fagaceae | Dicot |
| chinkapin | Castanea pumila var. pumila | CAPUP3 | Fagaceae | Dicot |
| chinkapin oak | Quercus muehlenbergii | QUMU | Fagaceae | Dicot |
| chloracantha | Chloracantha | CHLOR6 | Asteraceae | Dicot |
| chocolate vine | Akebia | AKEBI | Lardizabalaceae | Dicot |
| chocolate vine | Akebia quinata | AKQU | Lardizabalaceae | Dicot |
| chocolateweed | Melochia corchorifolia | MECO4 | Sterculiaceae | Dicot |
| chokeberry | Photinia | PHOTI | Rosaceae | Dicot |
| chorispora | Chorispora | CHORI | Brassicaceae | Dicot |
| Christmas candlestick | Leonotis nepetifolia | LENE | Lamiaceae | Dicot |
| Christmas fern | Polystichum acrostichoides | POAC4 | Dryopteridaceae | Fern |
| Christmas fern | Polystichum acrostichoides var. acrostichoides | POACA | Dryopteridaceae | Fern |
| Christmas mistletoe | Phoradendron tomentosum | PHTO2 | Viscaceae | Dicot |
| Christmasvine | Turbina corymbosa | TUCO | Convolvulaceae | Dicot |
| chrysogonum | Chrysogonum | CHRYS4 | Asteraceae | Dicot |
| churchmouse threeawn | Aristida dichotoma | ARDI4 | Poaceae | Monocot |
| churchmouse threeawn | Aristida dichotoma var. dichotoma | ARDID | Poaceae | Monocot |
| cinnamon | Cinnamomum | CINNA2 | Lauraceae | Dicot |
| cinnamon fern | Osmunda cinnamomea | OSCI | Osmundaceae | Fern |
| cinnamon fern | Osmunda cinnamomea var. cinnamomea | OSCIC | Osmundaceae | Fern |
| cinquefoil | Potentilla | POTEN | Rosaceae | Dicot |
| citrus | Citrus | CITRU2 | Rutaceae | Dicot |
| clammy goosefoot | Dysphania pumilio | DYPU | Chenopodiaceae | Dicot |
| clammy groundcherry | Physalis heterophylla | PHHE5 | Solanaceae | Dicot |
| clammy groundcherry | Physalis heterophylla var. heterophylla | PHHEH3 | Solanaceae | Dicot |
| clammy hedgehyssop | Gratiola neglecta | GRNE | Scrophulariaceae | Dicot |
| clammyweed | Polanisia | POLAN | Capparaceae | Dicot |
| clasping coneflower | Dracopis amplexicaulis | DRAM | Asteraceae | Dicot |
| clasping heliotrope | Heliotropium amplexicaule | HEAM4 | Boraginaceae | Dicot |
| clasping milkweed | Asclepias amplexicaulis | ASAM | Asclepiadaceae | Dicot |
| clasping Venus" looking-glass | Triodanis perfoliata | TRPE4 | Campanulaceae | Dicot |
| claspingleaf pondweed | Potamogeton perfoliatus | POPE7 | Potamogetonaceae | Monocot |
| claspingleaf St. Johnswort | Hypericum gymnanthum | HYGY | Clusiaceae | Dicot |
| claspleaf pennycress | Microthlaspi perfoliatum | MIPE8 | Brassicaceae | Dicot |
| clavel de muerto | Tithonia rotundifolia | TIRO | Asteraceae | Dicot |
| clearweed | Pilea | PILEA | Urticaceae | Dicot |
| cliff fern | Woodsia | WOODS | Dryopteridaceae | Fern |
| cliffbrake | Pellaea | PELLA | Pteridaceae | Fern |
| cliftonia | Cliftonia | CLIFT | Cyrillaceae | Dicot |
| climbing dayflower | Commelina diffusa | CODI5 | Commelinaceae | Monocot |
| climbing dayflower | Commelina diffusa var. diffusa | CODID3 | Commelinaceae | Monocot |
| climbing dogbane | Trachelospermum difforme | TRDI | Apocynaceae | Dicot |
| climbing false buckwheat | Polygonum scandens | POSC3 | Polygonaceae | Dicot |
| climbing false buckwheat | Polygonum scandens var. cristatum | POSCC | Polygonaceae | Dicot |
| climbing false buckwheat | Polygonum scandens var. scandens | POSCS | Polygonaceae | Dicot |
| climbing fern | Lygodium | LYGOD2 | Lygodiaceae | Fern |
| climbing hempvine | Mikania scandens | MISC | Asteraceae | Dicot |
| climbing rose | Rosa setigera | ROSE2 | Rosaceae | Dicot |
| climbing rose | Rosa setigera var. setigera | ROSES | Rosaceae | Dicot |
| climbingfig | Ficus pumila | FIPU2 | Moraceae | Dicot |
| clinopodium | Clinopodium | CLINO | Lamiaceae | Dicot |
| clover | Trifolium | TRIFO | Fabaceae | Dicot |
| clubmoss | Lycopodiella | LYCOP6 | Lycopodiaceae | Lycopod |
| clubmoss | Lycopodiella ×copelandii | LYCO8 | Lycopodiaceae | Lycopod |
| clustered beaksedge | Rhynchospora glomerata | RHGL3 | Cyperaceae | Monocot |
| clustered blacksnakeroot | Sanicula odorata | SAOD | Apiaceae | Dicot |
| clustered bushmint | Hyptis alata | HYAL | Lamiaceae | Dicot |
| clustered dock | Rumex conglomeratus | RUCO2 | Polygonaceae | Dicot |
| clustered fescue | Festuca paradoxa | FEPA2 | Poaceae | Monocot |
| clustered mille graines | Oldenlandia uniflora | OLUN | Rubiaceae | Dicot |
| clustered mountainmint | Pycnanthemum muticum | PYMU | Lamiaceae | Dicot |
| clustered pellitory | Parietaria praetermissa | PAPR6 | Urticaceae | Dicot |
| clustervine | Jacquemontia | JACQU | Convolvulaceae | Dicot |
| cnidoscolus | Cnidoscolus | CNIDO | Euphorbiaceae | Dicot |
| cnidoscolus | Cnidoscolus urens | CNUR | Euphorbiaceae | Dicot |
| coast agropogon | ×Agropogon littoralis | AGLI | Poaceae | Monocot |
| coast cockspur grass | Echinochloa walteri | ECWA | Poaceae | Monocot |
| coastal bedstraw | Galium hispidulum | GAHI | Rubiaceae | Dicot |
| coastal bristlegrass | Setaria corrugata | SECO4 | Poaceae | Monocot |
| coastal doghobble | Leucothoe axillaris | LEAX | Ericaceae | Dicot |
| coastal false asphodel | Triantha racemosa | TRRA6 | Liliaceae | Monocot |
| coastal groundcherry | Physalis angustifolia | PHAN8 | Solanaceae | Dicot |
| coastal indigo | Indigofera miniata | INMI | Fabaceae | Dicot |
| coastal lovegrass | Eragrostis refracta | ERRE | Poaceae | Monocot |
| coastal panicgrass | Panicum amarum var. amarulum | PAAMA2 | Poaceae | Monocot |
| coastal plain beaksedge | Rhynchospora stenophylla | RHST2 | Cyperaceae | Monocot |
| coastal plain blue-eyed grass | Sisyrinchium fuscatum | SIFU2 | Iridaceae | Monocot |
| coastal plain dawnflower | Stylisma patens | STPA8 | Convolvulaceae | Dicot |
| coastal plain dawnflower | Stylisma patens ssp. patens | STPAP8 | Convolvulaceae | Dicot |
| coastal plain false foxglove | Agalinis harperi | AGHA3 | Scrophulariaceae | Dicot |
| coastal plain flatsedge | Cyperus cuspidatus | CYCU | Cyperaceae | Monocot |
| coastal plain panicgrass | Dichanthelium longiligulatum | DILO4 | Poaceae | Monocot |
| coastal plain sedge | Carex crebriflora | CACR5 | Cyperaceae | Monocot |
| coastal plain St. Johnswort | Hypericum brachyphyllum | HYBR3 | Clusiaceae | Dicot |
| coastal plain tickseed | Coreopsis gladiata | COGL2 | Asteraceae | Dicot |
| coastal plain willow | Salix caroliniana | SACA5 | Salicaceae | Dicot |
| coastal plain yelloweyed grass | Xyris ambigua | XYAM | Xyridaceae | Monocot |
| coastal rose gentian | Sabatia calycina | SACA2 | Gentianaceae | Dicot |
| coastal sandbur | Cenchrus spinifex | CESP4 | Poaceae | Monocot |
| coastal searocket | Cakile lanceolata | CALA2 | Brassicaceae | Dicot |
| coastal searocket | Cakile lanceolata ssp. fusiformis | CALAF | Brassicaceae | Dicot |
| coastal searocket | Cakile lanceolata ssp. lanceolata | CALAL2 | Brassicaceae | Dicot |
| coastal searocket | Cakile lanceolata ssp. pseudoconstricta | CALAP | Brassicaceae | Dicot |
| coastal sweetpepperbush | Clethra alnifolia | CLAL3 | Clethraceae | Dicot |
| cock"s comb | Celosia | CELOS | Amaranthaceae | Dicot |
| cocklebur | Xanthium | XANTH2 | Asteraceae | Dicot |
| cockroach berry | Solanum capsicoides | SOCA10 | Solanaceae | Dicot |
| cockspur grass | Echinochloa | ECHIN4 | Poaceae | Monocot |
| cockspur hawthorn | Crataegus crus-galli | CRCR2 | Rosaceae | Dicot |
| cockspur pricklypear | Opuntia pusilla | OPPU2 | Cactaceae | Dicot |
| coco yam | Colocasia esculenta | COES | Araceae | Monocot |
| coco yam | Colocasia esculenta var. antiquorum | COESA | Araceae | Monocot |
| coco yam | Colocasia esculenta var. esculenta | COESE | Araceae | Monocot |
| coco yam | Colocasia esculenta var. nymphiifolia | COESN | Araceae | Monocot |
| cogongrass | Imperata cylindrica | IMCY | Poaceae | Monocot |
| colicroot | Aletris | ALETR | Liliaceae | Monocot |
| colocasia | Colocasia | COLOC | Araceae | Monocot |
| Colombian waxweed | Cuphea carthagenensis | CUCA4 | Lythraceae | Dicot |
| Columbian watermeal | Wolffia columbiana | WOCO | Lemnaceae | Monocot |
| Columbus grass | Sorghum almum | SOAL | Poaceae | Monocot |
| Comb"s crowngrass | Paspalum almum | PAAL7 | Poaceae | Monocot |
| combleaf mermaidweed | Proserpinaca pectinata | PRPE | Haloragaceae | Dicot |
| combleaf yellow false foxglove | Aureolaria pectinata | AUPE | Scrophulariaceae | Dicot |
| Combs" panicgrass | Panicum rigidulum var. combsii | PARIC | Poaceae | Monocot |
| comfortroot | Hibiscus aculeatus | HIAC | Malvaceae | Dicot |
| common balm | Melissa officinalis | MEOF2 | Lamiaceae | Dicot |
| common barley | Hordeum vulgare | HOVU | Poaceae | Monocot |
| common bladderwort | Utricularia macrorhiza | UTMA | Lentibulariaceae | Dicot |
| common blue violet | Viola sororia | VISO | Violaceae | Dicot |
| common boneset | Eupatorium perfoliatum | EUPE3 | Asteraceae | Dicot |
| common boneset | Eupatorium perfoliatum var. perfoliatum | EUPEP | Asteraceae | Dicot |
| common bugle | Ajuga reptans | AJRE | Lamiaceae | Dicot |