List of Texas Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| ?ilima | Sida cordifolia | SICO | Malvaceae | Dicot |
| Abert"s buckwheat | Eriogonum abertianum | ERAB2 | Polygonaceae | Dicot |
| Abert"s creeping zinnia | Sanvitalia abertii | SAAB | Asteraceae | Dicot |
| acacia | Acacia | ACACI | Fabaceae | Dicot |
| achicoria azul | Launaea intybacea | LAIN7 | Asteraceae | Dicot |
| acute spikerush | Eleocharis acutangula | ELAC5 | Cyperaceae | 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 |
| Adonis blazingstar | Mentzelia multiflora | MEMU3 | Loasaceae | Dicot |
| Adonis blazingstar | Mentzelia multiflora var. multiflora | MEMUM2 | Loasaceae | Dicot |
| African Bermudagrass | Cynodon nlemfuensis | CYNL80 | Poaceae | Monocot |
| African Bermudagrass | Cynodon nlemfuensis var. nlemfuensis | CYNLN | Poaceae | Monocot |
| African dogstooth grass | Cynodon transvaalensis | CYTR | Poaceae | Monocot |
| African feathergrass | Pennisetum macrourum | PEMA80 | Poaceae | Monocot |
| African liverseed grass | Urochloa mosambicensis | URMO80 | Poaceae | Monocot |
| African mustard | Malcolmia africana | MAAF | Brassicaceae | Dicot |
| African plume | Bauhinia galpinii | BAGA | Fabaceae | Dicot |
| African tamarisk | Tamarix africana | TAAF | Tamaricaceae | Dicot |
| agave | Agave | AGAVE | Agavaceae | Monocot |
| agdestis | Agdestis | AGDES2 | Phytolaccaceae | Dicot |
| 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 croton | Croton alabamensis | CRAL3 | Euphorbiaceae | Dicot |
| Alabama croton | Croton alabamensis var. texensis | CRALT | Euphorbiaceae | 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 |
| alderleaf mountain mahogany | Cercocarpus montanus | CEMO2 | Rosaceae | Dicot |
| alfalfa | Medicago | MEDIC | Fabaceae | Dicot |
| alfalfa | Medicago sativa | MESA | Fabaceae | Dicot |
| alfalfa | Medicago sativa ssp. sativa | MESAS | Fabaceae | Dicot |
| algerita | Mahonia trifoliolata | MATR3 | Berberidaceae | Dicot |
| alhagi | Alhagi | ALHAG | Fabaceae | Dicot |
| alkali buttercup | Ranunculus cymbalaria | RACY | Ranunculaceae | Dicot |
| alkali mallow | Malvella leprosa | MALE3 | Malvaceae | Dicot |
| alkali sacaton | Sporobolus airoides | SPAI | Poaceae | Monocot |
| alkali sandmat | Chamaesyce astyla | CHAS2 | Euphorbiaceae | Dicot |
| alkali sunflower | Helianthus laciniatus | HELA8 | Asteraceae | Dicot |
| alkali swainsonpea | Sphaerophysa salsula | SPSA3 | Fabaceae | Dicot |
| alkali yellowtops | Flaveria campestris | FLCA | Asteraceae | Dicot |
| alkaliweed | Cressa | CRESS | Convolvulaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens | MIRI | Scrophulariaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens var. ringens | MIRIR | Scrophulariaceae | Dicot |
| allenrolfea | Allenrolfea | ALLEN | Chenopodiaceae | Dicot |
| Allicoche hedgehog cactus | Echinocereus papillosus | ECPA4 | Cactaceae | Dicot |
| Allicoche hedgehog cactus | Echinocereus papillosus var. angusticeps | ECPAA2 | Cactaceae | Dicot |
| Allicoche hedgehog cactus | Echinocereus papillosus var. papillosus | ECPAP2 | Cactaceae | Dicot |
| alligator juniper | Juniperus deppeana | JUDE2 | Cupressaceae | Gymnosperm |
| alligator-flag | Thalia | THALI | Marantaceae | Monocot |
| alligatorweed | Alternanthera philoxeroides | ALPH | Amaranthaceae | Dicot |
| allthorn | Koeberlinia | KOEBE | Capparaceae | Dicot |
| aloe | Aloe | ALOE | Aloaceae | Monocot |
| aloe yucca | Yucca aloifolia | YUAL | Agavaceae | Monocot |
| alophia | Alophia | ALOPH | Iridaceae | Monocot |
| alpine cancer-root | Conopholis alpina | COAL6 | Orobanchaceae | Dicot |
| alpine false springparsley | Pseudocymopterus montanus | PSMO | Apiaceae | Dicot |
| alpine mountainsorrel | Oxyria digyna | OXDI3 | Polygonaceae | Dicot |
| alpine pennycress | Noccaea fendleri ssp. glauca | NOFEG | Brassicaceae | Dicot |
| alpine woodsorrel | Oxalis alpina | OXAL2 | Oxalidaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| amamastla | Rumex chrysocarpus | RUCH3 | Polygonaceae | Dicot |
| amatungulu | Carissa macrocarpa | CAMA37 | Apocynaceae | Dicot |
| Amazon sprangletop | Leptochloa panicoides | LEPA3 | Poaceae | Monocot |
| amberique-bean | Strophostyles helvola | STHE9 | Fabaceae | Dicot |
| amblyolepis | Amblyolepis | AMBLY | Asteraceae | Dicot |
| Amelia"s sand verbena | Abronia ameliae | ABAM2 | Nyctaginaceae | Dicot |
| American basswood | Tilia americana | TIAM | Tiliaceae | Dicot |
| American beautyberry | Callicarpa americana | CAAM2 | Verbenaceae | Dicot |
| American beech | Fagus grandifolia | FAGR | Fagaceae | 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 bluehearts | Buchnera americana | BUAM | Scrophulariaceae | Dicot |
| American buckwheat vine | Brunnichia ovata | BROV4 | Polygonaceae | Dicot |
| American bugseed | Corispermum americanum | COAM8 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. americanum | COAMA2 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. rydbergii | COAMR | Chenopodiaceae | Dicot |
| American 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 century plant | Agave americana ssp. protamericana | AGAMP | Agavaceae | Monocot |
| 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 fiveminute grass | Tripogon spicatus | TRSP | Poaceae | Monocot |
| 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 licorice | Glycyrrhiza lepidota | GLLE3 | Fabaceae | Dicot |
| American lopseed | Phryma leptostachya | PHLE5 | Verbenaceae | Dicot |
| American lotus | Nelumbo lutea | NELU | Nelumbonaceae | Dicot |
| American pillwort | Pilularia americana | PIAM | Marsileaceae | Fern |
| American pistachio | Pistacia mexicana | PIME4 | Anacardiaceae | 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 smoketree | Cotinus obovatus | COOB2 | Anacardiaceae | Dicot |
| American snoutbean | Rhynchosia americana | RHAM | Fabaceae | Dicot |
| American snowbell | Styrax americanus | STAM4 | Styracaceae | Dicot |
| American speedwell | Veronica americana | VEAM2 | Scrophulariaceae | Dicot |
| American spikenard | Aralia racemosa | ARRA | Araliaceae | Dicot |
| American spikenard | Aralia racemosa ssp. bicrenata | ARRAB2 | Araliaceae | Dicot |
| American spongeplant | Limnobium spongia | LISP2 | Hydrocharitaceae | Monocot |
| American star-thistle | Centaurea americana | CEAM2 | Asteraceae | Dicot |
| American sycamore | Platanus occidentalis | PLOC | Platanaceae | Dicot |
| American tarwort | Flourensia cernua | FLCE | Asteraceae | Dicot |
| American threefold | Trixis californica | TRCA8 | Asteraceae | Dicot |
| American vetch | Vicia americana | VIAM | Fabaceae | Dicot |
| American vetch | Vicia americana ssp. americana | VIAMA3 | Fabaceae | Dicot |
| American water horehound | Lycopus americanus | LYAM | Lamiaceae | Dicot |
| American 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 wild carrot | Daucus pusillus | DAPU3 | Apiaceae | Dicot |
| American wisteria | Wisteria frutescens | WIFR | Fabaceae | Dicot |
| American witchhazel | Hamamelis virginiana | HAVI4 | Hamamelidaceae | Dicot |
| ammi | Ammi | AMMI4 | Apiaceae | Dicot |
| ammocodon | Ammocodon | AMMOC | Nyctaginaceae | Dicot |
| Amur honeysuckle | Lonicera maackii | LOMA6 | Caprifoliaceae | Dicot |
| Amur privet | Ligustrum amurense | LIAM | Oleaceae | Dicot |
| anacahuita | Cordia boissieri | COBO2 | Boraginaceae | Dicot |
| Andean prairie clover | Dalea cylindriceps | DACY | Fabaceae | Dicot |
| Andean senna | Senna monozyx | SEMO11 | Fabaceae | Dicot |
| anemia fern | Anemia | ANEMI | Anemiaceae | Fern |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| angel"s trumpets | Acleisanthes longiflora | ACLO2 | Nyctaginaceae | Dicot |
| angled sandmint | Rhododon angulatus | RHAN5 | Lamiaceae | Dicot |
| anglestem beaksedge | Rhynchospora caduca | RHCA9 | Cyperaceae | Monocot |
| anglestem Indian mallow | Abutilon trisulcatum | ABTR | Malvaceae | Dicot |
| 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 |
| annual bastardcabbage | Rapistrum rugosum | RARU | Brassicaceae | Dicot |
| annual blue-eyed grass | Sisyrinchium rosulatum | SIRO5 | Iridaceae | Monocot |
| annual bluegrass | Poa annua | POAN | Poaceae | Monocot |
| annual buckwheat | Eriogonum annuum | ERAN4 | Polygonaceae | Dicot |
| annual bushsunflower | Simsia lagasceiformis | SILA11 | Asteraceae | Dicot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual fescue | Vulpia myuros | VUMY | Poaceae | Monocot |
| annual fimbry | Fimbristylis annua | FIAN | Cyperaceae | Monocot |
| annual mallow | Lavatera trimestris | LATR3 | Malvaceae | Dicot |
| 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 muhly | Muhlenbergia minutissima | MUMI2 | Poaceae | Monocot |
| 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. elatior | AMARE | 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 Townsend daisy | Townsendia annua | TOAN | Asteraceae | Dicot |
| annual trampweed | Facelis retusa | FARE | Asteraceae | Dicot |
| annual vernalgrass | Anthoxanthum aristatum | ANAR7 | Poaceae | Monocot |
| annual wallrocket | Diplotaxis muralis | DIMU2 | Brassicaceae | Dicot |
| annual windmills | Allionia choisyi | ALCH | Nyctaginaceae | Dicot |
| annual yellow sweetclover | Melilotus indicus | MEIN2 | Fabaceae | Dicot |
| anoda | Anoda | ANODA | Malvaceae | Dicot |
| antelopehorns | Asclepias asperula ssp. capricornu | ASASC | Asclepiadaceae | Dicot |
| antigonon | Antigonon | ANTIG | Polygonaceae | Dicot |
| antlerfern | Ceratopteris | CERAT2 | Parkeriaceae | Fern |
| apaac | Urvillea ulmacea | URUL | Sapindaceae | Dicot |
| Apache plume | Fallugia | FALLU | Rosaceae | Dicot |
| Apache plume | Fallugia paradoxa | FAPA | Rosaceae | Dicot |
| aparejograss | Muhlenbergia utilis | MUUT | Poaceae | Monocot |
| apodanthera | Apodanthera | APODA | Cucurbitaceae | Dicot |
| Appalachian blazing star | Liatris squarrulosa | LISQ2 | Asteraceae | Dicot |
| 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 rush | Juncus arcticus | JUAR2 | Juncaceae | Monocot |
| Argentine fingergrass | Eustachys retusa | EURE5 | Poaceae | Monocot |
| Argentine senna | Senna corymbosa | SECO9 | Fabaceae | Dicot |
| Argentine sprangletop | Leptochloa chloridiformis | LECH | Poaceae | Monocot |
| Argentinian crabgrass | Digitaria aequiglumis | DIAE3 | Poaceae | Monocot |
| Arizona bluecurls | Trichostema arizonicum | TRAR | Lamiaceae | Dicot |
| Arizona brome | Bromus arizonicus | BRAR4 | Poaceae | Monocot |
| Arizona centaury | Centaurium arizonicum | CEAR12 | Gentianaceae | Dicot |
| Arizona centaury | Centaurium calycosum | CECA3 | Gentianaceae | Dicot |
| Arizona cottontop | Digitaria californica | DICA8 | Poaceae | Monocot |
| Arizona cudweed | Pseudognaphalium arizonicum | PSAR12 | Asteraceae | Dicot |
| Arizona cypress | Hesperocyparis arizonica | HEAR22 | Cupressaceae | Gymnosperm |
| Arizona dewberry | Rubus arizonensis | RUAR3 | Rosaceae | Dicot |
| Arizona false goldenaster | Heterotheca fulcrata var. arizonica | HEFUA | Asteraceae | Dicot |
| Arizona fescue | Festuca arizonica | FEAR2 | Poaceae | Monocot |
| Arizona fleabane | Erigeron arizonicus | ERAR4 | Asteraceae | Dicot |
| Arizona gumweed | Grindelia arizonica | GRAR2 | Asteraceae | Dicot |
| Arizona gumweed | Grindelia arizonica var. arizonica | GRARA | Asteraceae | Dicot |
| Arizona honeysweet | Tidestromia oblongifolia | TIOB | Amaranthaceae | Dicot |
| Arizona pine | Pinus arizonica | PIAR5 | Pinaceae | Gymnosperm |
| Arizona pine | Pinus arizonica var. stormiae | PIARS2 | Pinaceae | Gymnosperm |
| Arizona poppy | Kallstroemia grandiflora | KAGR | Zygophyllaceae | Dicot |
| Arizona sandmat | Chamaesyce arizonica | CHAR18 | Euphorbiaceae | Dicot |
| Arizona signalgrass | Urochloa arizonica | URAR | Poaceae | Monocot |
| Arizona snakecotton | Froelichia arizonica | FRAR2 | Amaranthaceae | Dicot |
| Arizona spikemoss | Selaginella arizonica | SEAR2 | Selaginellaceae | Lycopod |
| Arizona spikerush | Eleocharis cancellata | ELCA9 | Cyperaceae | Monocot |
| Arizona stoneseed | Lithospermum confine | LICO9 | Boraginaceae | Dicot |
| Arizona threeawn | Aristida arizonica | ARAR6 | Poaceae | Monocot |
| Arizona valerian | Valeriana arizonica | VAAR3 | Valerianaceae | Dicot |
| Arizona walnut | Juglans major | JUMA | Juglandaceae | Dicot |
| Arizona wheatgrass | Elymus arizonicus | ELAR7 | Poaceae | Monocot |
| Arizona white oak | Quercus arizonica | QUAR | Fagaceae | Dicot |
| Arizona wrightwort | Carlowrightia arizonica | CAAR7 | Acanthaceae | Dicot |
| Arizonia cliffbrake | Pellaea ternifolia ssp. arizonica | PETEA | Pteridaceae | Fern |
| Arkansas beardtongue | Penstemon arkansanus | PEAR4 | Scrophulariaceae | Dicot |
| Arkansas dozedaisy | Aphanostephus skirrhobasis | APSK | Asteraceae | Dicot |
| Arkansas dozedaisy | Aphanostephus skirrhobasis var. kidderi | APSKK | 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 leastdaisy | Chaetopappa asteroides var. grandis | CHASG | Asteraceae | Dicot |
| Arkansas mannagrass | Glyceria arkansana | GLAR | Poaceae | Monocot |
| Arkansas meadow-rue | Thalictrum arkansanum | THAR | Ranunculaceae | Dicot |
| Arkansas oak | Quercus arkansana | QUAR2 | Fagaceae | Dicot |
| Arkansas sedge | Carex arkansana | CAAR5 | Cyperaceae | Monocot |
| Arkansas yucca | Yucca arkansana | YUAR2 | Agavaceae | Monocot |
| aromatic aster | Symphyotrichum oblongifolium | SYOB | Asteraceae | 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 |
| arrowhead | Sagittaria | SAGIT | Alismataceae | Monocot |
| arrowhead rattlebox | Crotalaria sagittalis | CRSA4 | Fabaceae | Dicot |
| arrowleaf clover | Trifolium vesiculosum | TRVE | Fabaceae | Dicot |
| arrowleaf elephant"s ear | Xanthosoma sagittifolium | XASA2 | Araceae | Monocot |
| arrowleaf mallow | Malvella sagittifolia | MASA3 | Malvaceae | Dicot |
| arrowleaf milkvine | Matelea sagittifolia | MASA4 | Asclepiadaceae | Dicot |
| arrowleaf tearthumb | Polygonum sagittatum | POSA5 | Polygonaceae | Dicot |
| arrowleaf violet | Viola sagittata | VISA2 | Violaceae | Dicot |
| arrowleaf violet | Viola sagittata var. sagittata | VISAS5 | Violaceae | Dicot |
| arrowweed | Pluchea sericea | PLSE | Asteraceae | Dicot |
| arroyo fameflower | Talinopsis frutescens | TAFR | Portulacaceae | Dicot |
| arroyo willow | Salix lasiolepis | SALA6 | Salicaceae | Dicot |
| arroyo willow | Salix lasiolepis var. lasiolepis | SALAL2 | Salicaceae | Dicot |
| Arsene"s buttercup | Ranunculus petiolaris var. arsenei | RAPEA2 | Ranunculaceae | Dicot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| Ashe"s juniper | Juniperus ashei | JUAS | Cupressaceae | Gymnosperm |
| ashy pricklyleaf | Thymophylla tephroleuca | THTE8 | Asteraceae | Dicot |
| ashy sandmat | Chamaesyce cinerascens | CHCI2 | Euphorbiaceae | Dicot |
| ashy sunflower | Helianthus mollis | HEMO2 | Asteraceae | Dicot |
| Asian crabgrass | Digitaria bicornis | DIBI | Poaceae | Monocot |
| Asian marshweed | Limnophila sessiliflora | LISE3 | Scrophulariaceae | Dicot |
| Asian mustard | Brassica tournefortii | BRTO | Brassicaceae | Dicot |
| Asian pigeonwings | Clitoria ternatea | CLTE3 | Fabaceae | Dicot |
| Asian ponysfoot | Dichondra micrantha | DIMI | Convolvulaceae | Dicot |
| Asiatic dayflower | Commelina communis | COCO3 | Commelinaceae | Monocot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| asphead | Aspicarpa | ASPIC | Malpighiaceae | Dicot |
| asphodelus | Asphodelus | ASPHO | Liliaceae | Monocot |
| asplenium ladyfern | Athyrium filix-femina ssp. asplenioides | ATFIA2 | Dryopteridaceae | Fern |
| aster | Eurybia | EURYB | Asteraceae | Dicot |
| aster | Ionactis | IONAC | Asteraceae | Dicot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| asthmaweed | Conyza bonariensis | COBO | Asteraceae | Dicot |
| asthmaweed | Conyza floribunda | COFL | Asteraceae | Dicot |
| astrophytum | Astrophytum | ASTRO2 | Cactaceae | Dicot |
| Athel tamarisk | Tamarix aphylla | TAAP | Tamaricaceae | Dicot |
| Atlantic camas | Camassia scilloides | CASC5 | Liliaceae | Monocot |
| Atlantic goldenrod | Solidago arguta | SOAR | Asteraceae | Dicot |
| Atlantic pigeonwings | Clitoria mariana | CLMA4 | Fabaceae | Dicot |
| Atlantic poison oak | Toxicodendron pubescens | TOPU2 | Anacardiaceae | Dicot |
| Aunt Lucy | Ellisia nyctelea | ELNY | Hydrophyllaceae | Dicot |
| Australian saltbush | Atriplex semibaccata | ATSE | Chenopodiaceae | Dicot |
| Australian waterbuttons | Cotula australis | COAU3 | Asteraceae | Dicot |
| autumn bluegrass | Poa autumnalis | POAU | Poaceae | Monocot |
| autumn coralroot | Corallorhiza odontorhiza | COOD7 | Orchidaceae | Monocot |
| autumn coralroot | Corallorhiza odontorhiza var. odontorhiza | COODO2 | Orchidaceae | Monocot |
| autumn onion | Allium stellatum | ALST | Liliaceae | Monocot |
| autumn sage | Salvia greggii | SAGR4 | Lamiaceae | Dicot |
| autumn zephyrlily | Zephyranthes candida | ZECA | Liliaceae | Monocot |
| avens | Geum | GEUM | Rosaceae | Dicot |
| awned halfchaff sedge | Lipocarpha aristulata | LIAR6 | Cyperaceae | Monocot |
| awnless beardgrass | Bothriochloa exaristata | BOEX | Poaceae | Monocot |
| awnless bushsunflower | Simsia calva | SICA7 | Asteraceae | Dicot |
| awnless leastdaisy | Chaetopappa imberbis | CHIM | Asteraceae | Dicot |
| axilflower | Mecardonia acuminata | MEAC | Scrophulariaceae | Dicot |
| axilflower | Mecardonia acuminata var. acuminata | MEACA | Scrophulariaceae | Dicot |
| ayenia | Ayenia | AYENI | Sterculiaceae | Dicot |
| azure blue sage | Salvia azurea | SAAZ | Lamiaceae | Dicot |
| azure blue sage | Salvia azurea var. azurea | SAAZA | Lamiaceae | Dicot |
| baby blue eyes | Nemophila | NEMOP | Hydrophyllaceae | Dicot |
| baby jump-up | Mecardonia procumbens | MEPR2 | Scrophulariaceae | Dicot |
| babybonnets | Coursetia | COURS | Fabaceae | Dicot |
| babyslippers | Hybanthus verticillatus | HYVE | Violaceae | Dicot |
| baccharis | Baccharis | BACCH | Asteraceae | Dicot |
| baccharisleaf beardtongue | Penstemon baccharifolius | PEBA | Scrophulariaceae | Dicot |
| bagpod | Sesbania vesicaria | SEVE | Fabaceae | Dicot |
| bahia | Picradeniopsis | PICRA3 | Asteraceae | Dicot |
| bahia | Bahia | BAHIA | Asteraceae | Dicot |
| 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 |
| Bailey"s hedgehog cactus | Echinocereus reichenbachii ssp. baileyi | ECREB2 | Cactaceae | Dicot |
| Bailey"s rabbitbrush | Chrysothamnus baileyi | CHBA11 | Asteraceae | Dicot |
| bajada lupine | Lupinus concinnus | LUCO | Fabaceae | Dicot |
| 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 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 milkwort | Polygala balduinii | POBA4 | Polygalaceae | 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 |
| balloonbush | Epixiphium wislizeni | EPWI2 | Scrophulariaceae | Dicot |
| balloonvine | Cardiospermum | CARDI2 | Sapindaceae | Dicot |
| balsam apple | Echinopepon | ECHIN7 | Cucurbitaceae | Dicot |
| balsampear | Momordica charantia | MOCH2 | Cucurbitaceae | Dicot |
| balsamscale grass | Elionurus | ELION | Poaceae | Monocot |
| bamboo | Phyllostachys | PHYLL6 | Poaceae | Monocot |
| banana yucca | Yucca baccata | YUBA | Agavaceae | Monocot |
| bandanna daisy | Gaillardia coahuilensis | GACO7 | Asteraceae | Dicot |
| bandanna of the Everglades | Canna flaccida | CAFL11 | Cannaceae | Monocot |
| Barbados aloe | Aloe vera | ALVE2 | Aloaceae | Monocot |
| Barbados shrub | Pereskia aculeata | PEAC2 | Cactaceae | Dicot |
| Barbara"s buttons | Marshallia | MARSH | Asteraceae | Dicot |
| Barbary fig | Opuntia ficus-indica | OPFI | Cactaceae | Dicot |
| barbed rattlesnakeroot | Prenanthes barbata | PRBA | Asteraceae | Dicot |
| barberry | Mahonia | MAHON | Berberidaceae | 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 |
| barometerbush | Leucophyllum | LEUCO3 | Scrophulariaceae | Dicot |
| barrel cactus | Ferocactus | FEROC | Cactaceae | Dicot |
| barrens silky aster | Symphyotrichum pratense | SYPR7 | Asteraceae | Dicot |
| barreta | Helietta parvifolia | HEPA3 | Rutaceae | Dicot |
| Bartlett daisy | Bartlettia scaposa | BASC | Asteraceae | Dicot |
| bartlettia | Bartlettia | BARTL | Asteraceae | Dicot |
| basil beebalm | Monarda clinopodioides | MOCL2 | Lamiaceae | Dicot |
| basil mountainmint | Pycnanthemum clinopodioides | PYCL | Lamiaceae | Dicot |
| basin bellflower | Campanula reverchonii | CARE3 | Campanulaceae | Dicot |
| basketgrass | Oplismenus | OPLIS | Poaceae | Monocot |
| basketgrass | Oplismenus hirtellus | OPHI | Poaceae | Monocot |
| basketgrass | Oplismenus hirtellus ssp. setarius | OPHIS | Poaceae | Monocot |
| basswood | Tilia | TILIA | Tiliaceae | Dicot |
| bastard oak | Quercus sinuata | QUSI | Fagaceae | Dicot |
| bastard oak | Quercus sinuata var. breviloba | QUSIB | Fagaceae | Dicot |
| bastard oak | Quercus sinuata var. sinuata | QUSIS | Fagaceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bastard white oak | Quercus ×beadlei | QUBE | Fagaceae | Dicot |
| bastard white oak | Quercus ×beaumontiana | QUBE2 | Fagaceae | Dicot |
| bastardcabbage | Rapistrum | RAPIS | Brassicaceae | Dicot |
| bastardia | Bastardia | BASTA | Malvaceae | Dicot |
| bastardsage | Eriogonum wrightii | ERWR | Polygonaceae | Dicot |
| bastardsage | Eriogonum wrightii var. wrightii | ERWRW | Polygonaceae | Dicot |
| bauhinia | Bauhinia | BAUHI | Fabaceae | Dicot |
| bay | Persea | PERSE | Lauraceae | Dicot |
| baybean | Canavalia rosea | CARO26 | Fabaceae | Dicot |
| bayberry | Morella | MOREL2 | Myricaceae | Dicot |
| bayhops | Ipomoea pes-caprae | IPPE | Convolvulaceae | Dicot |
| beach evening primrose | Oenothera drummondii | OEDR | Onagraceae | Dicot |
| beach false foxglove | Agalinis fasciculata | AGFA2 | Scrophulariaceae | Dicot |
| beach moonflower | Ipomoea violacea | IPVI | Convolvulaceae | Dicot |
| beach morning-glory | Ipomoea imperati | IPIM | Convolvulaceae | Dicot |
| beach seepweed | Suaeda conferta | SUCO | Chenopodiaceae | Dicot |
| beach sensitive pea | Chamaecrista chamaecristoides | CHCH3 | Fabaceae | Dicot |
| beach sensitive pea | Chamaecrista chamaecristoides var. cruziana | CHCHC | Fabaceae | Dicot |
| beaded lipfern | Cheilanthes wootonii | CHWO | Pteridaceae | Fern |
| beaked agrimony | Agrimonia rostellata | AGRO3 | Rosaceae | Dicot |
| beaked cornsalad | Valerianella radiata | VARA | Valerianaceae | Dicot |
| beaked mock vervain | Glandularia quandrangulata | GLQU | Verbenaceae | Dicot |
| beaked panicgrass | Panicum anceps | PAAN | Poaceae | Monocot |
| beaked skeletonweed | Shinnersoseris | SHINN2 | Asteraceae | Dicot |
| beaked skeletonweed | Shinnersoseris rostrata | SHRO2 | Asteraceae | Dicot |
| beaked spikerush | Eleocharis rostellata | ELRO2 | Cyperaceae | Monocot |
| beakgrain | Diarrhena | DIARR | Poaceae | Monocot |
| beaksedge | Rhynchospora | RHYNC3 | Cyperaceae | Monocot |
| bean | Phaseolus | PHASE | Fabaceae | Dicot |
| beancaper | Zygophyllum | ZYGOP | Zygophyllaceae | Dicot |
| Bear Mountain milkweed | Asclepias scaposa | ASSC9 | Asclepiadaceae | Dicot |
| beard lichen | Usnea | USNEA2 | Parmeliaceae | Lichen |
| bearded beggarticks | Bidens aristosa | BIAR | Asteraceae | Dicot |
| bearded cryptantha | Cryptantha barbigera | CRBA5 | Boraginaceae | Dicot |
| bearded flatsedge | Cyperus squarrosus | CYSQ | Cyperaceae | Monocot |
| bearded prairie clover | Dalea pogonathera | DAPO | Fabaceae | Dicot |
| bearded prairie clover | Dalea pogonathera var. pogonathera | DAPOP | Fabaceae | Dicot |
| bearded shorthusk | Brachyelytrum erectum | BRER2 | Poaceae | Monocot |
| bearded skeletongrass | Gymnopogon ambiguus | GYAM | Poaceae | Monocot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| bearded swallow-wort | Cynanchum barbigerum | CYBA | Asclepiadaceae | Dicot |
| beardgrass | Bothriochloa | BOTHR | Poaceae | Monocot |
| beardless rabbitsfoot grass | Polypogon viridis | POVI9 | Poaceae | Monocot |
| beardless wheatgrass | Pseudoroegneria spicata ssp. inermis | PSSPI | Poaceae | Monocot |
| beardless wildrye | Leymus triticoides | LETR5 | Poaceae | Monocot |
| beardlip penstemon | Penstemon barbatus | PEBA2 | Scrophulariaceae | Dicot |
| beardlip penstemon | Penstemon barbatus ssp. barbatus | PEBAB | Scrophulariaceae | Dicot |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| beargrass | Nolina | NOLIN | Liliaceae | Monocot |
| beautyberry | Callicarpa | CALLI2 | Verbenaceae | Dicot |
| Beckett"s water trumpet | Cryptocoryne beckettii | CRBE10 | Araceae | Monocot |
| bedstraw | Cruciata | CRUCI2 | Rubiaceae | Dicot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| bedstraw St. Johnswort | Hypericum galioides | HYGA | Clusiaceae | Dicot |
| beebalm | Monarda | MONAR | Lamiaceae | Dicot |
| beeblossom | Gaura | GAURA | Onagraceae | Dicot |
| beebrush | Aloysia | ALOYS | Verbenaceae | Dicot |
| beech | Fagus | FAGUS | Fagaceae | Dicot |
| beechdrops | Epifagus | EPIFA | Orobanchaceae | Dicot |
| beechdrops | Epifagus virginiana | EPVI2 | Orobanchaceae | Dicot |
| beechfern | Phegopteris | PHEGO | Thelypteridaceae | Fern |
| beechleaf frangula | Frangula betulifolia | FRBE2 | Rhamnaceae | Dicot |
| beefsteakplant | Perilla frutescens | PEFR4 | Lamiaceae | Dicot |
| beefsteakplant | Perilla frutescens var. frutescens | PEFRF2 | Lamiaceae | Dicot |
| beehive cactus | Coryphantha | CORYP | Cactaceae | Dicot |
| beet | Beta | BETA | Chenopodiaceae | Dicot |
| beetle spurge | Euphorbia eriantha | EUER2 | Euphorbiaceae | Dicot |
| beggarslice | Hackelia virginiana | HAVI2 | Boraginaceae | Dicot |
| beggarticks | Bidens | BIDEN | Asteraceae | Dicot |
| Bejar clover | Trifolium bejariense | TRBE3 | Fabaceae | Dicot |
| belamcanda | Belamcanda | BELAM | Iridaceae | Monocot |
| bellflower | Campanula | CAMPA | Campanulaceae | Dicot |
| bellwort | Uvularia | UVULA | Liliaceae | Monocot |
| bellybutton veinfern | Phanerophlebia umbonata | PHUM | Dryopteridaceae | Fern |
| bent sedge | Carex styloflexa | CAST9 | Cyperaceae | Monocot |
| bentawn flatsedge | Cyperus reflexus | CYRE2 | Cyperaceae | Monocot |
| bentgrass | Agrostis | AGROS2 | Poaceae | Monocot |
| bentspike fountaingrass | Pennisetum nervosum | PENE4 | Poaceae | Monocot |
| Berg"s panicgrass | Panicum bergii | PABE4 | Poaceae | Monocot |
| bergia | Bergia | BERGI | Elatinaceae | Dicot |
| Berlandier"s fiddlewood | Citharexylum berlandieri | CIBE | Verbenaceae | Dicot |
| Berlandier"s hedgehog cactus | Echinocereus berlandieri | ECBE | Cactaceae | Dicot |
| Berlandier"s Indian mallow | Abutilon berlandieri | ABBE | Malvaceae | Dicot |
| Berlandier"s jopoy | Esenbeckia berlandieri | ESBE | Rutaceae | Dicot |
| Berlandier"s lobelia | Lobelia berlandieri | LOBE3 | Campanulaceae | Dicot |
| Berlandier"s lobelia | Lobelia berlandieri var. berlandieri | LOBEB2 | Campanulaceae | Dicot |
| Berlandier"s lobelia | Lobelia berlandieri var. brachypoda | LOBEB | Campanulaceae | Dicot |
| Berlandier"s nettlespurge | Jatropha cathartica | JACA3 | Euphorbiaceae | Dicot |
| Berlandier"s sundrops | Calylophus berlandieri | CABE6 | Onagraceae | Dicot |
| Berlandier"s sundrops | Calylophus berlandieri ssp. berlandieri | CABEB2 | Onagraceae | Dicot |
| Berlandier"s sundrops | Calylophus berlandieri ssp. pinifolius | CABEP2 | Onagraceae | Dicot |
| Berlandier"s trumpets | Acleisanthes obtusa | ACOB2 | Nyctaginaceae | Dicot |
| Berlandier"s wolfberry | Lycium berlandieri | LYBE | Solanaceae | Dicot |
| Berlandier"s wolfberry | Lycium berlandieri var. berlandieri | LYBEB | Solanaceae | Dicot |
| Berlandier"s wolfberry | Lycium berlandieri var. parviflorum | LYBEP | Solanaceae | Dicot |
| Berlandier"s yellow flax | Linum berlandieri | LIBE2 | Linaceae | Dicot |
| Berlandier"s yellow flax | Linum berlandieri var. berlandieri | LIBEB2 | Linaceae | Dicot |
| Berlandier"s yellow flax | Linum berlandieri var. filifolium | LIBEF | Linaceae | Dicot |
| Bermudagrass | Cynodon | CYNOD | Poaceae | Monocot |
| Bermudagrass | Cynodon dactylon | CYDA | Poaceae | Monocot |
| Berteron"s sandmat | Chamaesyce berteriana | CHBE6 | Euphorbiaceae | Dicot |
| Bessey"s stickseed | Hackelia besseyi | HABE3 | Boraginaceae | Dicot |
| betonyleaf noseburn | Tragia betonicifolia | TRBE4 | Euphorbiaceae | Dicot |
| betonyleaf thoroughwort | Conoclinium betonicifolium | COBE4 | Asteraceae | Dicot |
| Beyrich"s fleabane | Erigeron strigosus var. beyrichii | ERSTB | Asteraceae | Dicot |
| biannual lettuce | Lactuca ludoviciana | LALU | Asteraceae | Dicot |
| Bicknell"s sedge | Carex bicknellii | CABI3 | Cyperaceae | Monocot |
| bicolor fanmustard | Nerisyrenia camporum | NECA3 | Brassicaceae | Dicot |
| biennial woollywhite | Hymenopappus biennis | HYBI | Asteraceae | Dicot |
| Big Bend barometerbush | Leucophyllum minus | LEMI4 | Scrophulariaceae | Dicot |
| Big Bend beardtongue | Penstemon havardii | PEHA2 | Scrophulariaceae | Dicot |
| Big Bend bluebonnet | Lupinus havardii | LUHA | Fabaceae | Dicot |
| Big Bend bluegrass | Poa strictiramea | POST6 | Poaceae | Monocot |
| Big Bend foxtail cactus | Escobaria dasyacantha | ESDA | Cactaceae | Dicot |
| Big Bend foxtail cactus | Escobaria dasyacantha var. dasyacantha | ESDAD | Cactaceae | Dicot |
| Big Bend pricklypear | Grusonia aggeria | GRAG3 | Cactaceae | Dicot |
| Big Bend pricklypear | Grusonia schottii | GRSC6 | Cactaceae | Dicot |
| Big Bend ringstem | Anulocaulis eriosolenus | ANER | Nyctaginaceae | Dicot |
| Big Bend thelypody | Thelypodium tenue | THTE3 | Brassicaceae | Dicot |
| Big Bend woodyaster | Xylorhiza wrightii | XYWR | Asteraceae | Dicot |
| big bluestem | Andropogon gerardii | ANGE | Poaceae | Monocot |
| big caltrop | Kallstroemia maxima | KAMA | Zygophyllaceae | Dicot |
| big carpetgrass | Axonopus furcatus | AXFU | Poaceae | Monocot |
| big chickweed | Cerastium fontanum ssp. vulgare | CEFOV2 | Caryophyllaceae | Dicot |
| big cordgrass | Spartina cynosuroides | SPCY | Poaceae | Monocot |
| big floatingheart | Nymphoides aquatica | NYAQ | Menyanthaceae | Dicot |
| big red sage | Salvia penstemonoides | SAPE6 | Lamiaceae | Dicot |
| big sacaton | Sporobolus wrightii | SPWR2 | Poaceae | Monocot |
| big sandbur | Cenchrus myosuroides | CEMY | Poaceae | Monocot |
| big yellow velvetleaf | Wissadula amplissima | WIAM | Malvaceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| Bigelow sage | Artemisia bigelovii | ARBI3 | Asteraceae | Dicot |
| Bigelow"s amaranth | Amaranthus bigelovii | AMBI | Amaranthaceae | Dicot |
| Bigelow"s bahia | Bahia bigelovii | BABI2 | Asteraceae | Dicot |
| Bigelow"s beggarticks | Bidens bigelovii | BIBI | Asteraceae | Dicot |
| Bigelow"s beggarticks | Bidens bigelovii var. bigelovii | BIBIB2 | Asteraceae | Dicot |
| Bigelow"s bluegrass | Poa bigelovii | POBI | Poaceae | Monocot |
| Bigelow"s bristlehead | Carphochaete bigelovii | CABI6 | Asteraceae | Dicot |
| Bigelow"s desertgrass | Blepharidachne bigelovii | BLBI | Poaceae | Monocot |
| Bigelow"s false willow | Baccharis bigelovii | BABI | Asteraceae | Dicot |
| Bigelow"s fleabane | Erigeron bigelovii | ERBI3 | Asteraceae | Dicot |
| Bigelow"s linanthus | Linanthus bigelovii | LIBI2 | Polemoniaceae | Dicot |
| Bigelow"s thoroughwort | Chromolaena bigelovii | CHBI3 | Asteraceae | Dicot |
| bigflower bladderpod | Lesquerella grandiflora | LEGR3 | Brassicaceae | Dicot |
| bigfoot waterclover | Marsilea macropoda | MAMA9 | Marsileaceae | Fern |
| bigfruit evening primrose | Oenothera macrocarpa | OEMA | Onagraceae | Dicot |
| bigfruit evening primrose | Oenothera macrocarpa ssp. incana | OEMAI2 | Onagraceae | Dicot |
| bigfruit evening primrose | Oenothera macrocarpa ssp. macrocarpa | OEMAM | Onagraceae | Dicot |
| bighead pygmycudweed | Evax prolifera | EVPR | Asteraceae | Dicot |
| bighead rush | Juncus megacephalus | JUME | Juncaceae | Monocot |
| Bighead straitjackets | Micropsis dasycarpa | MIDA2 | Asteraceae | Dicot |
| bigleaf periwinkle | Vinca major | VIMA | Apocynaceae | Dicot |
| bigleaf snowbell | Styrax grandifolius | STGR4 | Styracaceae | Dicot |
| bignonia | Bignonia | BIGNO | Bignoniaceae | Dicot |
| bigpod lady"s nightcap | Bonamia ovalifolia | BOOV2 | Convolvulaceae | Dicot |
| bigpod sesbania | Sesbania herbacea | SEHE8 | Fabaceae | Dicot |
| bigroot springparsley | Cymopterus macrorhizus | CYMA | Apiaceae | Dicot |
| bigseed alfalfa dodder | Cuscuta indecora | CUIN | Cuscutaceae | Dicot |
| bigseed alfalfa dodder | Cuscuta indecora var. indecora | CUINI | Cuscutaceae | Dicot |
| bigseed dodder | Cuscuta indecora var. longisepala | CUINL | Cuscutaceae | Dicot |
| bigseed dodder | Cuscuta indecora var. neuropetala | CUINN | Cuscutaceae | Dicot |
| bigtooth maple | Acer grandidentatum | ACGR3 | Aceraceae | Dicot |
| bigtooth maple | Acer grandidentatum var. grandidentatum | ACGRG | Aceraceae | Dicot |
| bigtop lovegrass | Eragrostis hirsuta | ERHI | Poaceae | Monocot |
| Bill Williams Mountain giant hyssop | Agastache pallidiflora | AGPA | Lamiaceae | Dicot |
| Bill Williams Mountain giant hyssop | Agastache pallidiflora ssp. neomexicana | AGPAN | Lamiaceae | Dicot |
| Bill Williams Mountain giant hyssop | Agastache pallidiflora ssp. neomexicana var. havardii | AGPAH3 | Lamiaceae | Dicot |
| billion-dollar grass | Echinochloa frumentacea | ECFR | Poaceae | Monocot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| bird"s-beak | Cordylanthus | CORDY | Scrophulariaceae | Dicot |
| bird"s-eye cress | Myagrum perfoliatum | MYPE | Brassicaceae | Dicot |
| bird"s-eye gilia | Gilia tricolor | GITR2 | Polemoniaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus | LOCO6 | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus var. corniculatus | LOCOC5 | Fabaceae | Dicot |
| bird-of-paradise shrub | Caesalpinia gilliesii | CAGI | Fabaceae | Dicot |
| birdbill dayflower | Commelina dianthifolia | CODI4 | Commelinaceae | Monocot |
| birdbill dayflower | Commelina dianthifolia var. dianthifolia | CODID | Commelinaceae | Monocot |
| birdeye pearlwort | Sagina procumbens | SAPR | Caryophyllaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdfoot violet | Viola pedata | VIPE | Violaceae | Dicot |
| birdseed leaf-flower | Phyllanthus pudens | PHPU6 | Euphorbiaceae | Dicot |
| birdwing passionflower | Passiflora tenuiloba | PATE9 | Passifloraceae | Dicot |
| birdwood grass | Cenchrus setiger | CESE10 | Poaceae | Monocot |
| bishop | Bifora | BIFOR | Apiaceae | Dicot |
| bitter dock | Rumex obtusifolius | RUOB | Polygonaceae | Dicot |
| bitter panicgrass | Panicum amarum | PAAM2 | Poaceae | Monocot |
| bitter panicgrass | Panicum amarum var. amarum | PAAMA3 | Poaceae | Monocot |
| bitter rubberweed | Hymenoxys odorata | HYOD | Asteraceae | Dicot |
| bitterbrush | Purshia | PURSH | Rosaceae | Dicot |
| bittercress | Cardamine | CARDA | Brassicaceae | Dicot |
| bitternut hickory | Carya cordiformis | CACO15 | Juglandaceae | Dicot |
| bittersweet | Celastrus | CELAS | Celastraceae | Dicot |
| black bamboo | Phyllostachys nigra | PHNI80 | Poaceae | Monocot |
| black bindweed | Polygonum convolvulus | POCO10 | Polygonaceae | Dicot |
| black bindweed | Polygonum convolvulus var. convolvulus | POCOC2 | Polygonaceae | Dicot |
| black bogrush | Schoenus nigricans | SCNI | Cyperaceae | Monocot |
| black cherry | Prunus serotina | PRSE2 | Rosaceae | Dicot |
| black cherry | Prunus serotina var. eximia | PRSEE | Rosaceae | Dicot |
| black cherry | Prunus serotina var. rufula | PRSER2 | Rosaceae | Dicot |
| black cherry | Prunus serotina var. serotina | PRSES | Rosaceae | Dicot |
| black cherry | Prunus serotina var. virens | PRSEV | Rosaceae | Dicot |
| black edge sedge | Carex nigromarginata | CANI3 | Cyperaceae | Monocot |
| black elderberry | Sambucus nigra | SANI4 | Caprifoliaceae | Dicot |
| black flatsedge | Cyperus niger | CYNI2 | Cyperaceae | Monocot |
| black grama | Bouteloua eriopoda | BOER4 | Poaceae | Monocot |
| 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 prairie clover | Dalea frutescens | DAFR2 | Fabaceae | Dicot |
| black walnut | Juglans nigra | JUNI | Juglandaceae | Dicot |
| black willow | Salix nigra | SANI | Salicaceae | Dicot |
| blackbead | Pithecellobium | PITHE | Fabaceae | Dicot |
| blackberry | Rubus | RUBUS | Rosaceae | Dicot |
| blackberry lily | Belamcanda chinensis | BECH | Iridaceae | Monocot |
| blackbrush acacia | Acacia rigidula | ACRI | Fabaceae | Dicot |
| 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 |
| blackeyed Susan vine | Thunbergia alata | THAL3 | Acanthaceae | Dicot |
| blackfoot | Melampodium | MELAM | Asteraceae | Dicot |
| blackfoot quillwort | Isoetes melanopoda | ISME | Isoetaceae | Quillwort |
| blackfoot sandmat | Chamaesyce angusta | CHAN5 | Euphorbiaceae | Dicot |
| blackfruit spikerush | Eleocharis melanocarpa | ELME | Cyperaceae | Monocot |
| blackgum | Nyssa sylvatica | NYSY | Cornaceae | Dicot |
| blackhaw | Viburnum prunifolium | VIPR | Caprifoliaceae | Dicot |
| blackjack oak | Quercus marilandica | QUMA3 | Fagaceae | Dicot |
| blackjack oak | Quercus marilandica var. ashei | QUMAA2 | 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 |
| blackseed spurge | Euphorbia bilobata | EUBI4 | Euphorbiaceae | Dicot |
| blacksenna | Seymeria | SEYME | Scrophulariaceae | Dicot |
| blackspot hornpoppy | Glaucium corniculatum | GLCO3 | Papaveraceae | Dicot |
| blackstem spleenwort | Asplenium resiliens | ASRE | Aspleniaceae | Fern |
| bladderfern | Cystopteris | CYSTO | Dryopteridaceae | Fern |
| bladdermallow | Herissantia crispa | HECR3 | Malvaceae | Dicot |
| bladderpod | Lesquerella | LESQU | Brassicaceae | Dicot |
| bladdersage | Salazaria | SALAZ | Lamiaceae | Dicot |
| bladderwort | Utricularia | UTRIC | Lentibulariaceae | Dicot |
| blanketflower | Gaillardia | GAILL | Asteraceae | Dicot |
| blazing star | Liatris aestivalis | LIAE3 | Asteraceae | Dicot |
| blazing star | Liatris | LIATR | Asteraceae | Dicot |
| blazingstar | Mentzelia | MENTZ | Loasaceae | Dicot |
| blessed milkthistle | Silybum marianum | SIMA3 | Asteraceae | Dicot |
| blessed thistle | Cnicus benedictus | CNBE | Asteraceae | Dicot |
| blind pricklypear | Opuntia rufida | OPRU3 | Cactaceae | 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 |
| blowout grass | Redfieldia | REDFI | Poaceae | Monocot |
| blowout grass | Redfieldia flexuosa | REFL | Poaceae | Monocot |
| blue boneset | Tamaulipa azurea | TAAZ | Asteraceae | Dicot |
| blue elderberry | Sambucus nigra ssp. cerulea | SANIC5 | Caprifoliaceae | Dicot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue fieldmadder | Sherardia arvensis | SHAR2 | Rubiaceae | Dicot |
| blue funnel lily | Androstephium coeruleum | ANCO9 | Liliaceae | Monocot |
| blue grama | Bouteloua gracilis | BOGR2 | Poaceae | Monocot |
| blue lettuce | Lactuca tatarica | LATA | Asteraceae | Dicot |
| blue lettuce | Lactuca tatarica var. pulchella | LATAP | Asteraceae | Dicot |
| blue milkwort | Polygala barbeyana | POBA | Polygalaceae | Dicot |
| blue mistflower | Conoclinium coelestinum | COCO13 | Asteraceae | Dicot |
| blue mudplantain | Heteranthera limosa | HELI2 | Pontederiaceae | Monocot |
| blue panicum | Panicum antidotale | PAAN4 | Poaceae | Monocot |
| Blue Ridge carrionflower | Smilax lasioneura | SMLA3 | Smilacaceae | Monocot |
| blue sedge | Carex glaucodea | CAGL6 | Cyperaceae | Monocot |
| blue skullcap | Scutellaria lateriflora | SCLA2 | Lamiaceae | Dicot |
| blue skullcap | Scutellaria lateriflora var. lateriflora | SCLAL2 | Lamiaceae | Dicot |
| blue threeawn | Aristida purpurea var. nealleyi | ARPUN | Poaceae | Monocot |
| blue waterhyssop | Bacopa caroliniana | BACA | Scrophulariaceae | Dicot |
| blue wild indigo | Baptisia australis | BAAU | Fabaceae | Dicot |
| blue wild indigo | Baptisia australis var. minor | BAAUM | Fabaceae | Dicot |
| blue wildrye | Elymus glaucus | ELGL | Poaceae | Monocot |
| blue wildrye | Elymus glaucus ssp. glaucus | ELGLG | Poaceae | Monocot |
| blue woodruff | Asperula arvensis | ASAR2 | Rubiaceae | Dicot |
| blue-eyed grass | Sisyrinchium | SISYR | Iridaceae | Monocot |
| bluebell bellflower | Campanula rotundifolia | CARO2 | Campanulaceae | Dicot |
| blueberry | Vaccinium | VACCI | Ericaceae | Dicot |
| blueberry hawthorn | Crataegus brachyacantha | CRBR | Rosaceae | Dicot |
| bluebill | Clematis pitcheri | CLPI | Ranunculaceae | Dicot |
| bluebill | Clematis pitcheri var. dictyota | CLPID | Ranunculaceae | Dicot |
| bluebill | Clematis pitcheri var. pitcheri | CLPIP | Ranunculaceae | Dicot |
| bluebowls | Giliastrum | GILIA2 | Polemoniaceae | Dicot |
| bluebowls | Giliastrum acerosum | GIAC4 | Polemoniaceae | Dicot |
| bluebowls | Giliastrum rigidulum | GIRI3 | Polemoniaceae | Dicot |
| bluebunch wheatgrass | Pseudoroegneria spicata | PSSP6 | Poaceae | Monocot |
| 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. texana | ARALT | Papaveraceae | Dicot |
| bluet | Houstonia | HOUST | Rubiaceae | Dicot |
| bluethread | Burmannia | BURMA | Burmanniaceae | Monocot |
| bluff rockdaisy | Perityle aglossa | PEAG | Asteraceae | 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 |
| bluntleaf spikemoss | Selaginella mutica | SEMU | Selaginellaceae | Lycopod |
| bluntleaf spikemoss | Selaginella mutica var. limitanea | SEMUL | Selaginellaceae | Lycopod |
| bluntleaf spikemoss | Selaginella mutica var. mutica | SEMUM | Selaginellaceae | Lycopod |
| bluntleaf spikemoss | Selaginella ×neomexicana | SENE3 | Selaginellaceae | Lycopod |
| bluntleaf yellowcress | Rorippa curvipes | ROCU2 | Brassicaceae | Dicot |
| bluntleaf yellowcress | Rorippa curvipes var. truncata | ROCUT | Brassicaceae | Dicot |
| bluntlobe cliff fern | Woodsia obtusa | WOOB2 | Dryopteridaceae | Fern |
| bluntlobe cliff fern | Woodsia obtusa ssp. obtusa | WOOBO | Dryopteridaceae | Fern |
| bluntpod bundleflower | Desmanthus obtusus | DEOB2 | Fabaceae | Dicot |
| bluntscale bahia | Bahia pedata | BAPE | Asteraceae | Dicot |
| blutaparon | Blutaparon | BLUTA | Amaranthaceae | Dicot |
| bog orchid | Habenaria | HABEN | Orchidaceae | Monocot |
| bog rush | Juncus biflorus | JUBI | Juncaceae | Monocot |
| bog smartweed | Polygonum setaceum | POSE6 | Polygonaceae | Dicot |
| bog white violet | Viola lanceolata | VILA4 | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. lanceolata | VILAL | Violaceae | Dicot |
| bog white violet | Viola lanceolata ssp. vittata | VILAV | Violaceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| bog yelloweyed grass | Xyris difformis var. difformis | XYDID | Xyridaceae | Monocot |
| bog yelloweyed grass | Xyris difformis | XYDI | Xyridaceae | Monocot |
| bogbutton | Lachnocaulon | LACHN | Eriocaulaceae | Monocot |
| bogmat | Wolffiella | WOLFF2 | Lemnaceae | Monocot |
| bogrush | Schoenus | SCHOE4 | Cyperaceae | Monocot |
| bommeria fern | Bommeria | BOMME | Pteridaceae | Fern |
| bonebract | Sclerocarpus | SCLER3 | Asteraceae | Dicot |
| bonebract amaranth | Amaranthus scleropoides | AMSC | Amaranthaceae | Dicot |
| boneset | Tamaulipa | TAMAU2 | Asteraceae | Dicot |
| Boott"s goldenrod | Solidago arguta var. boottii | SOARB | Asteraceae | Dicot |
| boquillas sandmat | Chamaesyce golondrina | CHGO3 | Euphorbiaceae | Dicot |
| border fleabane | Erigeron vicinus | ERVI | Asteraceae | Dicot |
| border pricklypear | Opuntia atrispina | OPAT | Cactaceae | Dicot |
| 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 sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| bottlebrush threeawn | Aristida spiciformis | ARSP3 | Poaceae | Monocot |
| bottomland aster | Symphyotrichum ontarionis | SYON2 | Asteraceae | Dicot |
| bottomland post oak | Quercus similis | QUSI2 | Fagaceae | Dicot |
| bouchea | Bouchea | BOUCH | Verbenaceae | Dicot |
| bouchetia | Bouchetia | BOUCH2 | Solanaceae | Dicot |
| bougainvillea | Bougainvillea | BOUGA | Nyctaginaceae | Dicot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| bouquet mudplantain | Heteranthera multiflora | HEMU5 | Pontederiaceae | Monocot |
| bouvardia | Bouvardia | BOUVA | Rubiaceae | Dicot |
| bowlesia | Bowlesia | BOWLE | Apiaceae | 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. texanum | ACNET | Aceraceae | Dicot |
| boxthorn fiddlewood | Citharexylum brachyanthum | CIBR3 | Verbenaceae | Dicot |
| Boykin"s clusterpea | Dioclea multiflora | DIMU | Fabaceae | Dicot |
| Boynton sand post oak | Quercus boyntonii | QUBO2 | Fagaceae | Dicot |
| brackenfern | Pteridium | PTERI | Dennstaedtiaceae | Fern |
| bract milkweed | Asclepias brachystephana | ASBR | Asclepiadaceae | Dicot |
| bracted bedstraw | Galium microphyllum | GAMI | Rubiaceae | Dicot |
| bracted blazing star | Liatris bracteata | LIBR | Asteraceae | Dicot |
| bracted fanpetals | Sida ciliaris | SICI | Malvaceae | Dicot |
| bracted jewelflower | Streptanthus bracteatus | STBR | Brassicaceae | Dicot |
| bracted passionflower | Passiflora affinis | PAAF | Passifloraceae | Dicot |
| bractless blazingstar | Mentzelia nuda | MENU | Loasaceae | Dicot |
| bractless blazingstar | Mentzelia nuda var. nuda | MENUN | Loasaceae | Dicot |
| bractless blazingstar | Mentzelia nuda var. stricta | MENUS | Loasaceae | Dicot |
| bractspike | Yeatesia | YEATE | Acanthaceae | Dicot |
| brake fern | Pteris | PTERI2 | Pteridaceae | Fern |
| branched blackberry | Rubus suus | RUSU4 | Rosaceae | Dicot |
| branched blazing star | Liatris cymosa | LICY2 | Asteraceae | Dicot |
| branched bur-reed | Sparganium androcladum | SPAN | Sparganiaceae | Monocot |
| branched centaury | Centaurium pulchellum | CEPU3 | Gentianaceae | Dicot |
| branched foldwing | Dicliptera brachiata | DIBR2 | Acanthaceae | Dicot |
| branched noseburn | Tragia ramosa | TRRA5 | Euphorbiaceae | Dicot |
| branched tearthumb | Polygonum meisnerianum | POME4 | Polygonaceae | Dicot |
| branched tearthumb | Polygonum meisnerianum var. beyrichianum | POMEB | Polygonaceae | Dicot |
| brasenia | Brasenia | BRASE | Cabombaceae | Dicot |
| Brazilian bayhops | Ipomoea pes-caprae ssp. brasiliensis | IPPEB | Convolvulaceae | Dicot |
| Brazilian bluewood | Condalia hookeri | COHO | Rhamnaceae | Dicot |
| Brazilian bluewood | Condalia hookeri var. hookeri | COHOH | Rhamnaceae | Dicot |
| Brazilian cat"s ear | Hypochaeris brasiliensis | HYBR5 | Asteraceae | Dicot |
| Brazilian morning-glory | Ipomoea setosa | IPSE3 | Convolvulaceae | Dicot |
| Brazilian peppertree | Schinus terebinthifolius | SCTE | Anacardiaceae | Dicot |
| Brazilian peppertree | Schinus terebinthifolius var. raddianus | SCTER2 | Anacardiaceae | Dicot |
| Brazilian vervain | Verbena brasiliensis | VEBR2 | Verbenaceae | Dicot |
| Brazilian watermeal | Wolffia brasiliensis | WOBR | Lemnaceae | Monocot |
| Brazilian waterweed | Egeria densa | EGDE | Hydrocharitaceae | Monocot |
| Brazoria palmetto | Sabal ×brazoriensis | SABR4 | Arecaceae | Monocot |
| Brazos hawthorn | Crataegus brazoria | CRBR4 | Rosaceae | Dicot |
| Brazos milkvetch | Astragalus brazoensis | ASBR7 | Fabaceae | Dicot |
| Brazos River yucca | Yucca necopina | YUNE | Agavaceae | Monocot |
| Brazos rockcress | Arabis petiolaris | ARPE4 | Brassicaceae | Dicot |
| Brazos-mint | Brazoria | BRAZO | Lamiaceae | Dicot |
| brazosmint | Warnockia | WARNO | Lamiaceae | Dicot |
| Brewster County barometerbush | Leucophyllum candidum | LECA12 | Scrophulariaceae | Dicot |
| brickellbush | Flyriella | FLYRI | Asteraceae | Dicot |
| brickellbush | Brickellia | BRICK | Asteraceae | Dicot |
| brickellbush | Brickelliastrum | BRICK3 | Asteraceae | Dicot |
| bright green spikerush | Eleocharis olivacea | ELOL | Cyperaceae | Monocot |
| bright green spikerush | Eleocharis olivacea var. olivacea | ELOLO | Cyperaceae | Monocot |
| brightwhite | Prenanthella exigua | PREX | Asteraceae | Dicot |
| bristle flax | Linum aristatum | LIAR3 | Linaceae | Dicot |
| bristle nailwort | Paronychia setacea | PASE2 | Caryophyllaceae | Dicot |
| bristle nailwort | Paronychia setacea var. longibracteata | PASEL2 | Caryophyllaceae | Dicot |
| bristle nailwort | Paronychia setacea var. setacea | PASES3 | Caryophyllaceae | Dicot |
| bristlecup sandmat | Chamaesyce chaetocalyx | CHCH5 | Euphorbiaceae | Dicot |
| bristlecup sandmat | Chamaesyce chaetocalyx var. chaetocalyx | CHCHC3 | Euphorbiaceae | Dicot |
| bristlecup sandmat | Chamaesyce chaetocalyx var. triligulata | CHCHT | Euphorbiaceae | Dicot |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristlehead | Carphochaete | CARPH2 | Asteraceae | Dicot |
| bristleleaf pricklyleaf | Thymophylla tenuiloba | THTE7 | Asteraceae | Dicot |
| bristleleaf pricklyleaf | Thymophylla tenuiloba var. tenuiloba | THTET | Asteraceae | Dicot |
| bristleleaf sedge | Carex eburnea | CAEB2 | Cyperaceae | Monocot |
| bristlemallow | Modiola | MODIO | Malvaceae | Dicot |
| bristleseed sandspurry | Spergularia echinosperma | SPEC | Caryophyllaceae | Dicot |
| bristly bedstraw | Galium uncinulatum | GAUN | Rubiaceae | 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 hawkbit | Leontodon hispidus | LEHI | Asteraceae | Dicot |
| bristly hawkbit | Leontodon hispidus ssp. hispidus | LEHIH | Asteraceae | Dicot |
| bristly hawksbeard | Crepis setosa | CRSE2 | Asteraceae | Dicot |
| bristly locust | Robinia hispida | ROHI | Fabaceae | Dicot |
| bristly locust | Robinia hispida var. hispida | ROHIH | Fabaceae | Dicot |
| bristly nama | Nama hispidum | NAHI | Hydrophyllaceae | Dicot |
| bristly scaleseed | Spermolepis echinata | SPEC2 | Apiaceae | Dicot |
| bristly smartweed | Polygonum hispidum | POHI2 | Polygonaceae | Dicot |
| bristly wolfstail | Lycurus setosus | LYSE3 | Poaceae | Monocot |
| bristlystalked sedge | Carex leptalea | CALE10 | Cyperaceae | Monocot |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle pricklypear | Opuntia fragilis | OPFR | Cactaceae | Dicot |
| brittle waternymph | Najas minor | NAMI | Najadaceae | Monocot |
| brittlebush | Encelia | ENCEL | Asteraceae | 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 halberd fern | Tectaria heracleifolia | TEHE | Dryopteridaceae | Fern |
| broadfruit combseed | Pectocarya platycarpa | PEPL | Boraginaceae | Dicot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf carpetgrass | Axonopus compressus | AXCO | Poaceae | Monocot |
| broadleaf cattail | Typha latifolia | TYLA | Typhaceae | Monocot |
| broadleaf ironweed | Vernonia ×guadalupensis | VEGU | Asteraceae | Dicot |
| broadleaf milkweed | Asclepias latifolia | ASLA4 | Asclepiadaceae | Dicot |
| broadleaf pondweed | Stuckenia striata | STST20 | Potamogetonaceae | Monocot |
| broadleaf rosette grass | Dichanthelium latifolium | DILA8 | Poaceae | Monocot |
| broadleaf signalgrass | Urochloa platyphylla | URPL2 | Poaceae | Monocot |
| broadleaf wild leek | Allium ampeloprasum | ALAM | Liliaceae | Monocot |
| broadleaved pepperweed | Lepidium latifolium | LELA2 | Brassicaceae | Dicot |
| broadpod draba | Draba platycarpa | DRPL | Brassicaceae | Dicot |
| broadpod jewelflower | Streptanthus platycarpus | STPL2 | Brassicaceae | Dicot |
| broadpod nicker | Pomaria brachycarpa | POBR21 | Fabaceae | Dicot |
| broadsepal yellowhood | Nissolia platycalyx | NIPL | Fabaceae | Dicot |
| broadvein sedge | Carex lativena | CALA76 | Cyperaceae | 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 cinquefoil | Potentilla rivalis | PORI3 | Rosaceae | Dicot |
| brook crowngrass | Paspalum acuminatum | PAAC4 | Poaceae | Monocot |
| brookweed | Samolus | SAMOL | Primulaceae | Dicot |
| broom dalea | Psorothamnus scoparius | PSSC6 | Fabaceae | Dicot |
| broom milkwort | Polygala scoparioides | POSC2 | Polygalaceae | Dicot |
| broom snakeweed | Gutierrezia sarothrae | GUSA2 | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides | SESP3 | Asteraceae | Dicot |
| broom-like ragwort | Senecio spartioides var. multicapitatus | SESPM | Asteraceae | Dicot |
| broomcorn millet | Panicum miliaceum ssp. miliaceum | PAMIM | Poaceae | Monocot |
| broomrape | Orobanche | OROBA | Orobanchaceae | Dicot |
| broomsage | Lepidospartum | LEPID2 | Asteraceae | 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 mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| Brown"s yellowtops | Flaveria brownii | FLBR2 | Asteraceae | 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 |
| brownfoot | Acourtia wrightii | ACWR5 | Asteraceae | Dicot |
| brownish beaksedge | Rhynchospora capitellata | RHCA12 | Cyperaceae | Monocot |
| brownplume wirelettuce | Stephanomeria pauciflora | STPA4 | Asteraceae | Dicot |
| brownseed paspalum | Paspalum plicatulum | PAPL3 | Poaceae | Monocot |
| brownspine hedgehog cactus | Echinocereus russanthus | ECRU4 | Cactaceae | Dicot |
| browntop | Microstegium | MICRO7 | Poaceae | Monocot |
| browntop millet | Urochloa ramosa | URRA | Poaceae | Monocot |
| browntop signalgrass | Urochloa fusca | URFU2 | Poaceae | Monocot |
| brush noseburn | Tragia glanduligera | TRGL | Euphorbiaceae | Dicot |
| brushholly | Xylosma flexuosa | XYFL3 | Flacourtiaceae | Dicot |
| brushland shrubverbena | Lantana achyranthifolia | LAAC | Verbenaceae | Dicot |
| brushpea | Genistidium | GENIS2 | Fabaceae | Dicot |
| brushpea | Genistidium dumosum | GEDU | Fabaceae | Dicot |
| buart | Juglans ×bixbyi | JUBI3 | Juglandaceae | Dicot |
| buckeye | Aesculus | AESCU | Hippocastanaceae | Dicot |
| buckeye | Aesculus ×bushii | AEBU | Hippocastanaceae | Dicot |
| buckhorn plantain | Plantago coronopus | PLCO3 | Plantaginaceae | Dicot |
| Buckley"s beardtongue | Penstemon buckleyi | PEBU | Scrophulariaceae | Dicot |
| Buckley"s dropseed | Sporobolus buckleyi | SPBU | Poaceae | Monocot |
| Buckley"s fluffgrass | Tridens buckleyanus | TRBU | Poaceae | Monocot |
| Buckley"s spiderwort | Tradescantia buckleyi | TRBU2 | Commelinaceae | Monocot |
| Buckley"s yucca | Yucca constricta | YUCO | Agavaceae | Monocot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckthorn bully | Sideroxylon lycioides | SILY | Sapotaceae | Dicot |
| buckwheat | Eriogonum | ERIOG | Polygonaceae | 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 |
| buffpetal | Rhynchosida physocalyx | RHPH2 | Malvaceae | Dicot |
| bugheal | Trichocoronis | TRICH4 | Asteraceae | Dicot |
| bugle | Ajuga | AJUGA | Lamiaceae | Dicot |
| bugloss | Anchusa | ANCHU | Boraginaceae | Dicot |
| buglossoides | Buglossoides | BUGLO | Boraginaceae | Dicot |
| bugseed | Corispermum | CORIS | Chenopodiaceae | Dicot |
| bulb panicgrass | Panicum bulbosum | PABU | Poaceae | Monocot |
| bulblet bladderfern | Cystopteris bulbifera | CYBU3 | Dryopteridaceae | Fern |
| 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 canarygrass | Phalaris aquatica | PHAQ | Poaceae | Monocot |
| bulbous springparsley | Cymopterus bulbosus | CYBU | Apiaceae | Dicot |
| bulbous woodrush | Luzula bulbosa | LUBU | Juncaceae | Monocot |
| bull crowngrass | Paspalum boscianum | PABO3 | Poaceae | Monocot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bullgrass | Muhlenbergia emersleyi | MUEM | Poaceae | Monocot |
| bulltongue arrowhead | Sagittaria lancifolia | SALA | Alismataceae | Monocot |
| bulltongue arrowhead | Sagittaria lancifolia ssp. media | SALAM2 | Alismataceae | Monocot |
| bully | Sideroxylon | SIDER2 | Sapotaceae | Dicot |
| bulrush | Schoenoplectiella | SCHOE7 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus ×oblongus | SCOB10 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bulrush | Oxycaryum | OXYCA | Cyperaceae | Monocot |
| bulrush | Isolepis | ISOLE | Cyperaceae | Monocot |
| bunch cutgrass | Leersia monandra | LEMO | Poaceae | 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 cucumber | Sicyos | SICYO | Cucurbitaceae | Dicot |
| bur grass | Tragus | TRAGU | Poaceae | Monocot |
| 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 |
| Burgess" broomsage | Lepidospartum burgessii | LEBU2 | Asteraceae | Dicot |
| burhead | Echinodorus | ECHIN6 | Alismataceae | Monocot |
| burnet | Sanguisorba | SANGU2 | Rosaceae | Dicot |
| burningbush | Euonymus atropurpureus | EUAT5 | Celastraceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burnweed | Erechtites | ERECH | Asteraceae | Dicot |
| Burridge"s greenthread | Thelesperma burridgeanum | THBU | Asteraceae | Dicot |
| burrobrush | Hymenoclea | HYMEN3 | Asteraceae | Dicot |
| burrograss | Scleropogon | SCLER7 | Poaceae | Monocot |
| burrograss | Scleropogon brevifolius | SCBR2 | Poaceae | Monocot |
| burrweed | Soliva | SOLIV | Asteraceae | Dicot |
| burrweed | Gymnostyles | GYMNO7 | Asteraceae | Dicot |
| bursting-heart | Euonymus americanus | EUAM9 | Celastraceae | Dicot |
| buryseed umbrellagrass | Enteropogon chlorideus | ENCH | Poaceae | Monocot |
| bush croton | Croton fruticulosus | CRFR | Euphorbiaceae | Dicot |
| bush morning-glory | Ipomoea leptophylla | IPLE | Convolvulaceae | Dicot |
| bush muhly | Muhlenbergia porteri | MUPO2 | Poaceae | Monocot |
| Bush"s blackberry | Rubus bushii | RUBU2 | Rosaceae | Dicot |
| Bush"s purple coneflower | Echinacea paradoxa | ECPA2 | Asteraceae | Dicot |
| Bush"s purple coneflower | Echinacea paradoxa var. neglecta | ECPAN | Asteraceae | 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 |
| bushclover dodder | Cuscuta pentagona var. pubescens | CUPEP3 | Cuscutaceae | Dicot |
| bushkiller | Cayratia japonica | CAJA7 | Vitaceae | Dicot |
| bushmint | Hyptis | HYPTI | Lamiaceae | Dicot |
| bushsunflower | Simsia | SIMSI | Asteraceae | Dicot |
| bushy bluestem | Andropogon glomeratus | ANGL2 | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. hirsutior | ANGLH | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. pumilus | ANGLP | Poaceae | Monocot |
| bushy buckwheat | Eriogonum suffruticosum | ERSU8 | Polygonaceae | Dicot |
| 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 lippia | Lippia alba | LIAL | Verbenaceae | 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 |
| butterfly tree | Bauhinia purpurea | BAPU | Fabaceae | Dicot |
| butterflybush | Buddleja | BUDDL2 | Buddlejaceae | Dicot |
| butterweed | Packera glabella | PAGL17 | Asteraceae | Dicot |