List of New York Plants
| Plant Name | Scientific Name | Plant CD | Family | Type |
|---|---|---|---|---|
| Aaron"s rod | Thermopsis villosa | THVI | Fabaceae | Dicot |
| absinthium | Artemisia absinthium | ARAB3 | Asteraceae | Dicot |
| Acadian quillwort | Isoetes acadiensis | ISAC | Isoetaceae | Quillwort |
| acaulon moss | Acaulon | ACAUL | Pottiaceae | Moss |
| acaulon moss | Acaulon muticum | ACMU5 | Pottiaceae | Moss |
| acinos | Acinos | ACINO | Lamiaceae | Dicot |
| actinidia | Actinidia | ACTIN3 | Actinidiaceae | Dicot |
| acuminate brachythecium moss | Brachythecium acuminatum | BRAC3 | Brachytheciaceae | Moss |
| acute brachythecium moss | Brachythecium acutum | BRAC4 | Brachytheciaceae | Moss |
| Adam and Eve | Aplectrum | APLEC | Orchidaceae | Monocot |
| Adam and Eve | Aplectrum hyemale | APHY | Orchidaceae | Monocot |
| Adam"s needle | Yucca filamentosa | YUFI | Agavaceae | Monocot |
| adder"s-mouth orchid | Malaxis | MALAX | Orchidaceae | Monocot |
| addersmeat | Stellaria holostea | STHO2 | Caryophyllaceae | Dicot |
| adderstongue | Ophioglossum | OPHIO | Ophioglossaceae | Fern |
| Addison"s rosette grass | Dichanthelium ovale var. addisonii | DIOVA | Poaceae | Monocot |
| Adirondack blackberry | Rubus lawrencei | RULA7 | Rosaceae | Dicot |
| adlumia | Adlumia | ADLUM | Fumariaceae | Dicot |
| adorned hawthorn | Crataegus compta | CRCO7 | Rosaceae | Dicot |
| adoxa | Adoxa | ADOXA | Adoxaceae | Dicot |
| aethusa | Aethusa | AETHU | Apiaceae | Dicot |
| Afghan erysimum | Erysimum perofskianum | ERPE18 | Brassicaceae | Dicot |
| agrimony | Agrimonia | AGRIM | Rosaceae | Dicot |
| agueweed | Gentianella quinquefolia | GEQU2 | Gentianaceae | Dicot |
| agueweed | Gentianella quinquefolia ssp. quinquefolia | GEQUQ | Gentianaceae | Dicot |
| ailanthus | Ailanthus | AILAN | Simaroubaceae | Dicot |
| albizia | Albizia | ALBIZ | Fabaceae | Dicot |
| alder | Alnus | ALNUS | Betulaceae | Dicot |
| alder | Alnus ×fallacina | ALFA4 | Betulaceae | Dicot |
| alderleaf buckthorn | Rhamnus alnifolia | RHAL | Rhamnaceae | Dicot |
| alfalfa | Medicago | MEDIC | Fabaceae | Dicot |
| alfalfa | Medicago sativa | MESA | Fabaceae | Dicot |
| alfalfa | Medicago sativa ssp. sativa | MESAS | Fabaceae | Dicot |
| alkali buttercup | Ranunculus cymbalaria | RACY | Ranunculaceae | Dicot |
| alkali sacaton | Sporobolus airoides | SPAI | Poaceae | Monocot |
| alkaligrass | Puccinellia | PUCCI | Poaceae | Monocot |
| Allegheny blackberry | Rubus allegheniensis | RUAL | Rosaceae | Dicot |
| Allegheny blackberry | Rubus allegheniensis var. allegheniensis | RUALA | Rosaceae | Dicot |
| Allegheny hawkweed | Hieracium paniculatum | HIPA2 | Asteraceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens | MIRI | Scrophulariaceae | Dicot |
| Allegheny monkeyflower | Mimulus ringens var. ringens | MIRIR | Scrophulariaceae | Dicot |
| Allegheny Mountain buttercup | Ranunculus allegheniensis | RAAL2 | Ranunculaceae | Dicot |
| Allegheny plum | Prunus alleghaniensis | PRAL5 | Rosaceae | Dicot |
| Allegheny plum | Prunus alleghaniensis var. alleghaniensis | PRALA | Rosaceae | Dicot |
| Allegheny serviceberry | Amelanchier laevis | AMLA | Rosaceae | Dicot |
| Allegheny stonecrop | Hylotelephium telephioides | HYTE9 | Crassulaceae | Dicot |
| allegheny vine | Adlumia fungosa | ADFU | Fumariaceae | Dicot |
| Allegheny-spurge | Pachysandra procumbens | PAPR7 | Buxaceae | Dicot |
| alliaria | Alliaria | ALLIA | Brassicaceae | Dicot |
| allseed | Radiola linoides | RALI | Linaceae | Dicot |
| alpine azalea | Loiseleuria procumbens | LOPR | Ericaceae | Dicot |
| alpine bulrush | Trichophorum alpinum | TRAL7 | Cyperaceae | Monocot |
| alpine pondweed | Potamogeton alpinus | POAL8 | Potamogetonaceae | Monocot |
| alpine rattlesnakeroot | Prenanthes boottii | PRBO2 | Asteraceae | Dicot |
| alpine rockcress | Arabis alpina | ARAL8 | Brassicaceae | Dicot |
| alpine sweetgrass | Anthoxanthum monticola | ANMO7 | Poaceae | Monocot |
| alpine sweetgrass | Anthoxanthum monticola ssp. alpinum | ANMOA3 | Poaceae | Monocot |
| alpine sweetgrass | Anthoxanthum monticola ssp. monticola | ANMOM2 | Poaceae | Monocot |
| alpine violet | Viola labradorica | VILA10 | Violaceae | Dicot |
| alpine woodsia | Woodsia alpina | WOAL | Dryopteridaceae | Fern |
| Alps wormwood | Artemisia umbelliformis | ARUM | Asteraceae | Dicot |
| Alps yarrow | Achillea distans | ACDI6 | Asteraceae | Dicot |
| alsike clover | Trifolium hybridum | TRHY | Fabaceae | Dicot |
| alternateflower watermilfoil | Myriophyllum alterniflorum | MYAL3 | Haloragaceae | Dicot |
| alternateleaf dogwood | Cornus alternifolia | COAL2 | Cornaceae | Dicot |
| alumroot | Heuchera | HEUCH | Saxifragaceae | Dicot |
| amberique-bean | Strophostyles helvola | STHE9 | Fabaceae | Dicot |
| amblystegium moss | Amblystegium | AMBLY4 | Amblystegiaceae | Moss |
| amblystegium moss | Amblystegium serpens | AMSE3 | Amblystegiaceae | Moss |
| amblystegium moss | Amblystegium varium | AMVA | Amblystegiaceae | Moss |
| 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. americana | TIAMA | Tiliaceae | Dicot |
| American basswood | Tilia americana var. heterophylla | TIAMH | Tiliaceae | Dicot |
| American beachgrass | Ammophila breviligulata | AMBR | Poaceae | Monocot |
| 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 bittercress | Cardamine rotundifolia | CARO3 | Brassicaceae | Dicot |
| American bittersweet | Celastrus scandens | CESC | Celastraceae | Dicot |
| American black currant | Ribes americanum | RIAM2 | Grossulariaceae | Dicot |
| American black elderberry | Sambucus nigra ssp. canadensis | SANIC4 | Caprifoliaceae | Dicot |
| American bladdernut | Staphylea trifolia | STTR | Staphyleaceae | Dicot |
| American bluehearts | Buchnera americana | BUAM | Scrophulariaceae | Dicot |
| American bugseed | Corispermum americanum | COAM8 | Chenopodiaceae | Dicot |
| American bugseed | Corispermum americanum var. americanum | COAMA2 | Chenopodiaceae | Dicot |
| American bur-reed | Sparganium americanum | SPAM | Sparganiaceae | Monocot |
| American burnweed | Erechtites hieraciifolia | ERHI2 | Asteraceae | Dicot |
| American burnweed | Erechtites hieraciifolia var. hieraciifolia | ERHIH | Asteraceae | Dicot |
| American burnweed | Erechtites hieraciifolia var. megalocarpa | ERHIM | Asteraceae | Dicot |
| American cancer-root | Conopholis americana | COAM | Orobanchaceae | Dicot |
| American chestnut | Castanea dentata | CADE12 | Fagaceae | Dicot |
| American climacium moss | Climacium americanum | CLAM3 | Climaciaceae | Moss |
| American climbing fern | Lygodium palmatum | LYPA3 | Lygodiaceae | Fern |
| American columbo | Frasera caroliniensis | FRCA2 | Gentianaceae | Dicot |
| American common reed | Phragmites australis ssp. americanus | PHAUA6 | Poaceae | Monocot |
| American cranberrybush | Viburnum opulus var. americanum | VIOPA2 | Caprifoliaceae | Dicot |
| American dragonhead | Dracocephalum parviflorum | DRPA2 | Lamiaceae | Dicot |
| American eelgrass | Vallisneria americana | VAAM3 | Hydrocharitaceae | Monocot |
| American elm | Ulmus americana | ULAM | Ulmaceae | Dicot |
| American false pennyroyal | Hedeoma pulegioides | HEPU | Lamiaceae | Dicot |
| American featherfoil | Hottonia inflata | HOIN | Primulaceae | Dicot |
| American fly honeysuckle | Lonicera canadensis | LOCA7 | Caprifoliaceae | Dicot |
| American ginseng | Panax quinquefolius | PAQU | Araliaceae | Dicot |
| American globeflower | Trollius laxus | TRLA14 | Ranunculaceae | Dicot |
| American globeflower | Trollius laxus ssp. laxus | TRLAL | Ranunculaceae | Dicot |
| American golden saxifrage | Chrysosplenium americanum | CHAM2 | Saxifragaceae | Dicot |
| American hazelnut | Corylus americana | COAM3 | Betulaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata | AMBR2 | Fabaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata var. bracteata | AMBRB | Fabaceae | Dicot |
| American hogpeanut | Amphicarpaea bracteata var. comosa | AMBRC | Fabaceae | Dicot |
| American 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. virginiana | CACAV | Betulaceae | Dicot |
| American ipecac | Euphorbia ipecacuanhae | EUIP | Euphorbiaceae | 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 mannagrass | Glyceria grandis | GLGR | Poaceae | Monocot |
| American mannagrass | Glyceria grandis var. grandis | GLGRG | Poaceae | Monocot |
| American marshpennywort | Hydrocotyle americana | HYAM | Apiaceae | Dicot |
| American milletgrass | Milium effusum | MIEF | Poaceae | Monocot |
| American milletgrass | Milium effusum var. cisatlanticum | MIEFC | Poaceae | Monocot |
| American mountain ash | Sorbus americana | SOAM3 | Rosaceae | 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 red raspberry | Rubus idaeus | RUID | Rosaceae | Dicot |
| American red raspberry | Rubus idaeus ssp. idaeus | RUIDI | Rosaceae | 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 searocket | Cakile edentula ssp. edentula var. lacustris | CAEDL2 | Brassicaceae | Dicot |
| American senna | Senna hebecarpa | SEHE3 | Fabaceae | Dicot |
| American shoreweed | Littorella uniflora | LIUN | Plantaginaceae | Dicot |
| American sloughgrass | Beckmannia syzigachne | BESY | Poaceae | Monocot |
| American speedwell | Veronica americana | VEAM2 | Scrophulariaceae | Dicot |
| American spikenard | Aralia racemosa | ARRA | Araliaceae | Dicot |
| American spikenard | Aralia racemosa ssp. racemosa | ARRAR | Araliaceae | Dicot |
| American spongeplant | Limnobium spongia | LISP2 | Hydrocharitaceae | Monocot |
| American spurred gentian | Halenia deflexa | HADE2 | Gentianaceae | Dicot |
| American spurred gentian | Halenia deflexa ssp. deflexa | HADED2 | Gentianaceae | Dicot |
| American star-thistle | Centaurea americana | CEAM2 | Asteraceae | Dicot |
| American stickseed | Hackelia deflexa var. americana | HADEA | Boraginaceae | Dicot |
| American stoneseed | Lithospermum latifolium | LILA2 | Boraginaceae | Dicot |
| American sycamore | Platanus occidentalis | PLOC | Platanaceae | Dicot |
| American vetch | Vicia americana | VIAM | Fabaceae | Dicot |
| American vetch | Vicia americana ssp. americana | VIAMA3 | Fabaceae | Dicot |
| American water horehound | Lycopus americanus | LYAM | Lamiaceae | Dicot |
| American water plantain | Alisma subcordatum | ALSU | Alismataceae | Monocot |
| American water-willow | Justicia americana | JUAM | Acanthaceae | Dicot |
| American waterawlwort | Subularia aquatica var. americana | SUAQA2 | Brassicaceae | 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 white waterlily | Nymphaea odorata ssp. tuberosa | NYODT | Nymphaeaceae | Dicot |
| American wintergreen | Pyrola americana | PYAM | Pyrolaceae | Dicot |
| American wisteria | Wisteria frutescens | WIFR | Fabaceae | Dicot |
| American witchhazel | Hamamelis virginiana | HAVI4 | Hamamelidaceae | Dicot |
| American woollyfruit sedge | Carex lasiocarpa var. americana | CALAA | Cyperaceae | Monocot |
| amerorchis | Amerorchis | AMERO | Orchidaceae | Monocot |
| Ames" quillwort | Isoetes riparia var. amesii | ISRIA | Isoetaceae | Quillwort |
| amianthium | Amianthium | AMIAN | Liliaceae | Monocot |
| amphidium moss | Amphidium | AMPHI10 | Orthotrichaceae | Moss |
| Amur corktree | Phellodendron amurense | PHAM2 | Rutaceae | Dicot |
| Amur honeysuckle | Lonicera maackii | LOMA6 | Caprifoliaceae | Dicot |
| Amur maple | Acer ginnala | ACGI | Aceraceae | Dicot |
| Amur peppervine | Ampelopsis brevipedunculata | AMBR7 | Vitaceae | Dicot |
| Amur privet | Ligustrum amurense | LIAM | Oleaceae | Dicot |
| Amur silvergrass | Miscanthus sacchariflorus | MISA | Poaceae | Monocot |
| andreaea moss | Andreaea rupestris | ANRU7 | Andreaeaceae | Moss |
| andreaea moss | Andreaea | ANDRE2 | Andreaeaceae | Moss |
| Andrews" blackberry | Rubus andrewsianus | RUAN2 | Rosaceae | Dicot |
| anemone | Anemone | ANEMO | Ranunculaceae | Dicot |
| angelica | Angelica | ANGEL | Apiaceae | 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 bluegrass | Poa annua | POAN | Poaceae | Monocot |
| annual canarygrass | Phalaris canariensis | PHCA5 | Poaceae | Monocot |
| annual fescue | Vulpia myuros | VUMY | Poaceae | Monocot |
| annual hairgrass | Deschampsia danthonioides | DEDA | Poaceae | Monocot |
| annual hedgenettle | Stachys annua | STAN | Lamiaceae | Dicot |
| annual honesty | Lunaria annua | LUAN | Brassicaceae | Dicot |
| annual mercury | Mercurialis annua | MEAN | Euphorbiaceae | Dicot |
| annual rabbitsfoot grass | Polypogon monspeliensis | POMO5 | Poaceae | Monocot |
| annual ragweed | Ambrosia artemisiifolia | AMAR2 | Asteraceae | Dicot |
| annual ragweed | Ambrosia artemisiifolia var. artemisiifolia | AMARA2 | 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 vernalgrass | Anthoxanthum aristatum | ANAR7 | Poaceae | Monocot |
| annual wallrocket | Diplotaxis muralis | DIMU2 | Brassicaceae | Dicot |
| annual wheatgrass | Eremopyrum triticeum | ERTR13 | Poaceae | Monocot |
| 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 |
| anomodon moss | Anomodon | ANOMO | Anomodontaceae | Moss |
| anomodon moss | Anomodon attenuatus | ANAT4 | Anomodontaceae | Moss |
| anomodon moss | Anomodon rostratus | ANRO6 | Anomodontaceae | Moss |
| antifever fontinalis moss | Fontinalis antipyretica | FOAN2 | Fontinalaceae | Moss |
| aphanorrhegma moss | Aphanorrhegma | APHAN5 | Funariaceae | Moss |
| Appalachia false bindweed | Calystegia sepium ssp. appalachiana | CASEA4 | Convolvulaceae | Dicot |
| Appalachian barren strawberry | Waldsteinia fragarioides | WAFR | Rosaceae | Dicot |
| Appalachian barren strawberry | Waldsteinia fragarioides ssp. fragarioides | WAFRF | Rosaceae | Dicot |
| Appalachian clubmoss | Huperzia appalachiana | HUAP | Lycopodiaceae | Lycopod |
| Appalachian gooseberry | Ribes rotundifolium | RIRO2 | Grossulariaceae | Dicot |
| Appalachian polypody | Polypodium appalachianum | POAP | Polypodiaceae | Fern |
| Appalachian quillwort | Isoetes engelmannii | ISEN | Isoetaceae | Quillwort |
| Appalachian sedge | Carex appalachica | CAAP5 | Cyperaceae | Monocot |
| Appalachian shoestring fern | Vittaria appalachiana | VIAP2 | Vittariaceae | Fern |
| Appalachian stitchwort | Minuartia glabra | MIGL5 | Caryophyllaceae | Dicot |
| apple | Malus | MALUS | Rosaceae | Dicot |
| apple mint | Mentha suaveolens | MESU5 | Lamiaceae | Dicot |
| apple of Peru | Nicandra physalodes | NIPH | Solanaceae | Dicot |
| apple rose | Rosa villosa | ROVI80 | Rosaceae | Dicot |
| arborvitae | Thuja | THUJA | Cupressaceae | Gymnosperm |
| arborvitae | Thuja occidentalis | THOC2 | Cupressaceae | Gymnosperm |
| arching dewberry | Rubus recurvicaulis | RURE2 | Rosaceae | Dicot |
| arctic brome | Bromus kalmii | BRKA2 | Poaceae | Monocot |
| arctic cudweed | Omalotheca | OMALO | Asteraceae | Dicot |
| arctic daisy | Chrysanthemum arcticum | CHAR13 | Asteraceae | Dicot |
| arctic daisy | Chrysanthemum arcticum ssp. polare | CHARP3 | Asteraceae | Dicot |
| arctic reedgrass | Calamagrostis coarctata | CACO71 | Poaceae | Monocot |
| arctic rush | Juncus arcticus | JUAR2 | Juncaceae | Monocot |
| arctic sweet coltsfoot | Petasites frigidus | PEFR5 | Asteraceae | Dicot |
| arctic sweet coltsfoot | Petasites frigidus var. palmatus | PEFRP | Asteraceae | Dicot |
| Argentine fingergrass | Eustachys retusa | EURE5 | Poaceae | Monocot |
| Arkansas ironweed | Vernonia arkansana | VEAR3 | Asteraceae | Dicot |
| Arkansas mannagrass | Glyceria arkansana | GLAR | Poaceae | Monocot |
| armoracia | Armoracia | ARMOR | Brassicaceae | Dicot |
| arnica | Arnica | ARNIC | Asteraceae | Dicot |
| Arnold hawthorn | Crataegus ×anomala | CRAN6 | Rosaceae | Dicot |
| arnoseris | Arnoseris | ARNOS | Asteraceae | Dicot |
| aromatic aster | Symphyotrichum oblongifolium | SYOB | Asteraceae | Dicot |
| arrow arum | Peltandra | PELTA | Araceae | Monocot |
| arrow bamboo | Pseudosasa | PSEUD9 | Poaceae | Monocot |
| arrow bamboo | Pseudosasa japonica | PSJA | Poaceae | 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 tearthumb | Polygonum sagittatum | POSA5 | Polygonaceae | Dicot |
| arrowleaf violet | Viola sagittata | VISA2 | Violaceae | Dicot |
| arrowleaf violet | Viola sagittata var. ovata | VISAO | Violaceae | Dicot |
| arrowleaf violet | Viola sagittata var. sagittata | VISAS5 | Violaceae | Dicot |
| artichoke betony | Stachys affinis | STAF2 | Lamiaceae | Dicot |
| arumleaf arrowhead | Sagittaria cuneata | SACU | Alismataceae | Monocot |
| aruncus | Aruncus | ARUNC | Rosaceae | Dicot |
| Ascherson"s orchardgrass | Dactylis glomerata ssp. aschersoniana | DAGLA | Poaceae | Monocot |
| ash | Fraxinus | FRAXI | Oleaceae | Dicot |
| ashy cinquefoil | Potentilla inclinata | POIN10 | Rosaceae | Dicot |
| ashy sunflower | Helianthus mollis | HEMO2 | Asteraceae | Dicot |
| Asian copperleaf | Acalypha australis | ACAU6 | Euphorbiaceae | Dicot |
| Asian flatsedge | Cyperus amuricus | CYAM2 | Cyperaceae | Monocot |
| Asian meadowsweet | Spiraea trilobata | SPTR2 | Rosaceae | Dicot |
| Asian white birch | Betula platyphylla | BEPL2 | Betulaceae | Dicot |
| Asian white birch | Betula platyphylla var. platyphylla | BEPLP | Betulaceae | Dicot |
| Asiatic dayflower | Commelina communis | COCO3 | Commelinaceae | Monocot |
| Asiatic tearthumb | Polygonum perfoliatum | POPE10 | Polygonaceae | Dicot |
| asparagus | Asparagus | ASPAR | Liliaceae | Monocot |
| asplenium ladyfern | Athyrium filix-femina ssp. asplenioides | ATFIA2 | Dryopteridaceae | Fern |
| aster | Eurybia ×herveyi | EUHE9 | Asteraceae | Dicot |
| aster | Eurybia | EURYB | Asteraceae | Dicot |
| aster | Oclemena | OCLEM | Asteraceae | Dicot |
| aster | Oclemena ×blakei | OCBL | Asteraceae | Dicot |
| aster | Ionactis | IONAC | Asteraceae | Dicot |
| aster | Symphyotrichum | SYMPH4 | Asteraceae | Dicot |
| aster | Symphyotrichum ×amethystinum | SYAM3 | Asteraceae | Dicot |
| astomum moss | Astomum | ASTOM | Pottiaceae | Moss |
| astomum moss | Astomum phascoides | ASPH7 | Pottiaceae | Moss |
| Atlantic goldenrod | Solidago arguta | SOAR | Asteraceae | Dicot |
| Atlantic goldenrod | Solidago arguta var. arguta | SOARA | Asteraceae | Dicot |
| Atlantic Ivy | Hedera hibernica | HEHI12 | Araliaceae | Dicot |
| Atlantic mannagrass | Glyceria obtusa | GLOB | Poaceae | Monocot |
| Atlantic ninebark | Physocarpus opulifolius var. intermedius | PHOPI | Rosaceae | Dicot |
| Atlantic pigeonwings | Clitoria mariana | CLMA4 | Fabaceae | Dicot |
| Atlantic sphagnum | Sphagnum atlanticum | SPAT3 | Sphagnaceae | Moss |
| Atlantic white cedar | Chamaecyparis thyoides | CHTH2 | Cupressaceae | Gymnosperm |
| atrichum moss | Atrichum | ATRIC2 | Polytrichaceae | Moss |
| atrichum moss | Atrichum angustatum | ATAN3 | Polytrichaceae | Moss |
| atrichum moss | Atrichum crispum | ATCR | Polytrichaceae | Moss |
| aulacomnium moss | Aulacomnium | AULAC2 | Aulacomniaceae | Moss |
| aulacomnium moss | Aulacomnium heterostichum | AUHE | Aulacomniaceae | Moss |
| aulacomnium moss | Aulacomnium palustre | AUPA70 | Aulacomniaceae | Moss |
| Aunt Lucy | Ellisia nyctelea | ELNY | Hydrophyllaceae | Dicot |
| auricled twayblade | Listera auriculata | LIAU2 | Orchidaceae | Monocot |
| aurinia | Aurinia | AURIN | Brassicaceae | Dicot |
| Australian tobacco | Nicotiana suaveolens | NISU | Solanaceae | Dicot |
| Austrian pine | Pinus nigra | PINI | Pinaceae | Gymnosperm |
| Austrian yellowcress | Rorippa austriaca | ROAU | Brassicaceae | Dicot |
| autumn coralroot | Corallorhiza odontorhiza | COOD7 | Orchidaceae | Monocot |
| autumn coralroot | Corallorhiza odontorhiza var. odontorhiza | COODO2 | Orchidaceae | Monocot |
| autumn coralroot | Corallorhiza odontorhiza var. pringlei | COODP2 | Orchidaceae | Monocot |
| autumn crocus | Colchicum autumnale | COAU4 | Liliaceae | Monocot |
| autumn olive | Elaeagnus umbellata | ELUM | Elaeagnaceae | Dicot |
| autumn olive | Elaeagnus umbellata var. parvifolia | ELUMP | Elaeagnaceae | Dicot |
| autumn willow | Salix serissima | SASE2 | Salicaceae | Dicot |
| avens | Geum | GEUM | Rosaceae | Dicot |
| avens | Geum ×aurantiacum | GEAU2 | Rosaceae | Dicot |
| awl-leaf arrowhead | Sagittaria subulata | SASU | Alismataceae | Monocot |
| awlfruit sedge | Carex stipata | CAST5 | Cyperaceae | Monocot |
| awlwort | Subularia | SUBUL | Brassicaceae | Dicot |
| awned bedstraw | Galium aristatum | GAAR5 | Rubiaceae | Dicot |
| Aztec marigold | Tagetes erecta | TAER | Asteraceae | Dicot |
| Aztec tobacco | Nicotiana rustica | NIRU | Solanaceae | Dicot |
| azure blue sage | Salvia azurea | SAAZ | Lamiaceae | Dicot |
| azure bluet | Houstonia caerulea | HOCA4 | Rubiaceae | Dicot |
| baby"s breath | Gypsophila paniculata | GYPA | Caryophyllaceae | Dicot |
| baby"s-breath | Gypsophila | GYPSO | Caryophyllaceae | Dicot |
| baccharis | Baccharis | BACCH | Asteraceae | Dicot |
| Back"s sedge | Carex backii | CABA3 | Cyperaceae | Monocot |
| Bailey"s dewberry | Rubus baileyanus | RUBA2 | Rosaceae | Dicot |
| Bailey"s sedge | Carex baileyi | CABA7 | Cyperaceae | Monocot |
| 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 |
| Balkan catchfly | Silene csereii | SICS | Caryophyllaceae | Dicot |
| ballmustard | Neslia paniculata | NEPA3 | Brassicaceae | Dicot |
| balloon vine | Cardiospermum halicacabum | CAHA13 | Sapindaceae | Dicot |
| balloon-flower | Platycodon grandiflorus | PLGR7 | Campanulaceae | Dicot |
| balloonvine | Cardiospermum | CARDI2 | Sapindaceae | Dicot |
| balm | Melissa | MELIS | Lamiaceae | Dicot |
| balm-of-Gilead | Populus ×jackii | POJA2 | Salicaceae | Dicot |
| balsam fir | Abies balsamea | ABBA | Pinaceae | Gymnosperm |
| balsam fir | Abies balsamea var. balsamea | ABBAB | Pinaceae | Gymnosperm |
| balsam groundsel | Packera paupercula | PAPA20 | Asteraceae | Dicot |
| balsam poplar | Populus balsamifera | POBA2 | Salicaceae | Dicot |
| balsam poplar | Populus balsamifera ssp. balsamifera | POBAB2 | Salicaceae | Dicot |
| balsam willow | Salix pyrifolia | SAPY | Salicaceae | Dicot |
| bamboo | Phyllostachys | PHYLL6 | Poaceae | Monocot |
| bamboo vine | Smilax pseudochina | SMPS | Smilacaceae | Monocot |
| baneberry | Actaea | ACTAE | Ranunculaceae | Dicot |
| baneberry | Actaea ×ludovici | ACLU | Ranunculaceae | Dicot |
| barbed bristlegrass | Setaria verticilliformis | SEVE5 | Poaceae | Monocot |
| barbed goatgrass | Aegilops triuncialis | AETR | Poaceae | Monocot |
| barbedbristle bulrush | Scirpus ancistrochaetus | SCAN5 | Cyperaceae | Monocot |
| barberry | Berberis | BERBE | Berberidaceae | Dicot |
| barberry | Mahonia | MAHON | Berberidaceae | Dicot |
| barberry hawthorn | Crataegus berberifolia | CRBE2 | Rosaceae | Dicot |
| barbula moss | Barbula | BARBU2 | Pottiaceae | Moss |
| barbula moss | Barbula unguiculata | BAUN6 | Pottiaceae | Moss |
| barestem teesdalia | Teesdalia nudicaulis | TENU | Brassicaceae | Dicot |
| barley | Hordeum | HORDE | Poaceae | Monocot |
| barnyardgrass | Echinochloa crus-galli | ECCR | Poaceae | Monocot |
| Barratt"s sedge | Carex barrattii | CABA9 | Cyperaceae | Monocot |
| barren strawberry | Waldsteinia | WALDS | Rosaceae | Dicot |
| bartramia moss | Bartramia | BARTR2 | Bartramiaceae | Moss |
| bartramia moss | Bartramia pomiformis | BAPO70 | Bartramiaceae | Moss |
| bashful bulrush | Trichophorum planifolium | TRPL6 | Cyperaceae | Monocot |
| basil | Ocimum | OCIMU | Lamiaceae | Dicot |
| basil mountainmint | Pycnanthemum clinopodioides | PYCL | Lamiaceae | Dicot |
| basil thyme | Acinos arvensis | ACAR2 | Lamiaceae | Dicot |
| basket of gold | Aurinia saxatilis | AUSA | Brassicaceae | Dicot |
| basket willow | Salix viminalis | SAVI2 | Salicaceae | Dicot |
| basswood | Tilia | TILIA | Tiliaceae | Dicot |
| bastard toadflax | Comandra | COMAN | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata | COUM | Santalaceae | Dicot |
| bastard toadflax | Comandra umbellata ssp. umbellata | COUMU | Santalaceae | Dicot |
| bastardcabbage | Rapistrum | RAPIS | Brassicaceae | Dicot |
| bats in the belfry | Campanula trachelium | CATR4 | Campanulaceae | Dicot |
| bay forget-me-not | Myosotis laxa | MYLA | Boraginaceae | Dicot |
| Bayard"s adder"s-mouth orchid | Malaxis bayardii | MABA6 | Orchidaceae | Monocot |
| bayberry | Morella | MOREL2 | Myricaceae | Dicot |
| bayonet rush | Juncus militaris | JUMI2 | Juncaceae | Monocot |
| beach false foxglove | Agalinis fasciculata | AGFA2 | Scrophulariaceae | Dicot |
| beach pea | Lathyrus japonicus | LAJA | Fabaceae | Dicot |
| beach pea | Lathyrus japonicus var. maritimus | LAJAM | Fabaceae | Dicot |
| beach pea | Lathyrus japonicus var. pellitus | LAJAP2 | Fabaceae | Dicot |
| beach pinweed | Lechea maritima | LEMA | Cistaceae | Dicot |
| beach pinweed | Lechea maritima var. maritima | LEMAM | Cistaceae | Dicot |
| beach plum | Prunus maritima | PRMA2 | Rosaceae | Dicot |
| beach plum | Prunus maritima var. maritima | PRMAM | Rosaceae | Dicot |
| beach sedge | Carex silicea | CASI6 | Cyperaceae | Monocot |
| beach strawberry | Fragaria chiloensis | FRCH | Rosaceae | Dicot |
| beachgrass | Ammophila | AMMOP | Poaceae | Monocot |
| beaked agrimony | Agrimonia rostellata | AGRO3 | Rosaceae | Dicot |
| beaked hawksbeard | Crepis vesicaria | CRVE3 | Asteraceae | Dicot |
| beaked hawksbeard | Crepis vesicaria ssp. taraxacifolia | CRVET | Asteraceae | Dicot |
| beaked hazelnut | Corylus cornuta | COCO6 | Betulaceae | Dicot |
| beaked hazelnut | Corylus cornuta var. cornuta | COCOC2 | Betulaceae | Dicot |
| beaked panicgrass | Panicum anceps | PAAN | Poaceae | Monocot |
| beaked sedge | Carex rostrata | CARO6 | Cyperaceae | Monocot |
| 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 oak | Quercus ilicifolia | QUIL | Fagaceae | Dicot |
| bearberry willow | Salix uva-ursi | SAUV | Salicaceae | Dicot |
| beard lichen | Usnea | USNEA2 | Parmeliaceae | Lichen |
| bearded beggarticks | Bidens aristosa | BIAR | Asteraceae | Dicot |
| bearded flatsedge | Cyperus squarrosus | CYSQ | Cyperaceae | Monocot |
| bearded shorthusk | Brachyelytrum erectum | BRER2 | Poaceae | Monocot |
| bearded sprangletop | Leptochloa fusca ssp. fascicularis | LEFUF | Poaceae | Monocot |
| beardgrass | Bothriochloa | BOTHR | Poaceae | Monocot |
| beardtongue | Penstemon | PENST | Scrophulariaceae | Dicot |
| Bebb willow | Salix bebbiana | SABE2 | Salicaceae | Dicot |
| Bebb"s sedge | Carex bebbii | CABE2 | Cyperaceae | Monocot |
| Beck"s water-marigold | Bidens beckii | BIBE2 | Asteraceae | Dicot |
| bedstraw | Cruciata | CRUCI2 | Rubiaceae | Dicot |
| bedstraw | Galium | GALIU | Rubiaceae | Dicot |
| bedstraw | Galium ×pomeranicum | GAPO3 | Rubiaceae | 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. crispa | PEFRC2 | Lamiaceae | Dicot |
| beefsteakplant | Perilla frutescens var. frutescens | PEFRF2 | Lamiaceae | Dicot |
| beet | Beta | BETA | Chenopodiaceae | Dicot |
| beetleweed | Galax urceolata | GAUR2 | Diapensiaceae | Dicot |
| beggarslice | Hackelia virginiana | HAVI2 | Boraginaceae | Dicot |
| beggarticks | Bidens | BIDEN | Asteraceae | Dicot |
| belamcanda | Belamcanda | BELAM | Iridaceae | Monocot |
| belladonna | Atropa | ATROP | Solanaceae | Dicot |
| belladonna | Atropa bella-donna | ATBE | Solanaceae | Dicot |
| bellflower | Campanulastrum | CAMPA2 | Campanulaceae | Dicot |
| bellflower | Campanula | CAMPA | Campanulaceae | Dicot |
| bellis | Bellis | BELLI | Asteraceae | Dicot |
| bellwort | Uvularia | UVULA | Liliaceae | Monocot |
| bent sedge | Carex styloflexa | CAST9 | Cyperaceae | Monocot |
| bent-foot speedwell | Veronica campylopoda | VECA19 | Scrophulariaceae | Dicot |
| bentgrass | Agrostis | AGROS2 | Poaceae | Monocot |
| Bermudagrass | Cynodon | CYNOD | Poaceae | Monocot |
| Bermudagrass | Cynodon dactylon | CYDA | Poaceae | Monocot |
| Bethlehem lungwort | Pulmonaria saccharata | PUSA2 | Boraginaceae | Dicot |
| Beyrich"s fleabane | Erigeron strigosus var. beyrichii | ERSTB | Asteraceae | Dicot |
| Bicknell"s cranesbill | Geranium bicknellii | GEBI2 | Geraniaceae | Dicot |
| Bicknell"s sedge | Carex bicknellii | CABI3 | Cyperaceae | Monocot |
| biennial beeblossom | Gaura biennis | GABI2 | Onagraceae | Dicot |
| biennial wormwood | Artemisia biennis | ARBI2 | Asteraceae | Dicot |
| biennial wormwood | Artemisia biennis var. biennis | ARBIB | Asteraceae | Dicot |
| big blue birch | Betula ×caerulea var. grandis | BECAG | Betulaceae | Dicot |
| big bluestem | Andropogon gerardii | ANGE | 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 quakinggrass | Briza maxima | BRMA | Poaceae | Monocot |
| big-sage | Stachys macrantha | STMA12 | Lamiaceae | Dicot |
| bigbract verbena | Verbena bracteata | VEBR | Verbenaceae | Dicot |
| Bigelow"s sedge | Carex bigelowii | CABI5 | Cyperaceae | Monocot |
| bigfruit dodder | Cuscuta megalocarpa | CUME4 | Cuscutaceae | Dicot |
| bigfruit hawthorn | Crataegus macrosperma | CRMA3 | Rosaceae | Dicot |
| bigleaf aster | Eurybia macrophylla | EUMA27 | Asteraceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus | LUPO2 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus | LUPOP2 | Fabaceae | Dicot |
| bigleaf lupine | Lupinus polyphyllus ssp. polyphyllus var. polyphyllus | LUPOP4 | Fabaceae | Dicot |
| bigleaf magnolia | Magnolia macrophylla | MAMA2 | Magnoliaceae | Dicot |
| bigleaf periwinkle | Vinca major | VIMA | Apocynaceae | Dicot |
| bigpod sesbania | Sesbania herbacea | SEHE8 | Fabaceae | Dicot |
| bigtooth aspen | Populus grandidentata | POGR4 | Salicaceae | Dicot |
| Billings" Sedge | Carex billingsii | CABI22 | Cyperaceae | Monocot |
| billion-dollar grass | Echinochloa frumentacea | ECFR | Poaceae | Monocot |
| bindweed | Convolvulus | CONVO | Convolvulaceae | Dicot |
| birch | Betula | BETUL | Betulaceae | Dicot |
| birch | Betula ×purpusii | BEPU3 | Betulaceae | Dicot |
| bird vetch | Vicia cracca | VICR | Fabaceae | Dicot |
| bird vetch | Vicia cracca ssp. cracca | VICRC | Fabaceae | Dicot |
| bird"s-foot | Ornithopus | ORNIT2 | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus | LOCO6 | Fabaceae | Dicot |
| bird"s-foot trefoil | Lotus corniculatus var. corniculatus | LOCOC5 | Fabaceae | Dicot |
| birdeye pearlwort | Sagina procumbens | SAPR | Caryophyllaceae | Dicot |
| birdeye speedwell | Veronica persica | VEPE3 | Scrophulariaceae | Dicot |
| birdfoot violet | Viola pedata | VIPE | Violaceae | Dicot |
| birthwort | Aristolochia clematitis | ARCL | Aristolochiaceae | Dicot |
| bishop"s goutweed | Aegopodium podagraria | AEPO | Apiaceae | Dicot |
| bitter dock | Rumex obtusifolius | RUOB | Polygonaceae | Dicot |
| bitter panicgrass | Panicum amarum var. amarum | PAAMA3 | Poaceae | Monocot |
| bitter panicgrass | Panicum amarum | PAAM2 | Poaceae | Monocot |
| bittercress | Cardamine | CARDA | Brassicaceae | Dicot |
| bittercress | Cardamine ×anomala | CAAN12 | Brassicaceae | Dicot |
| bittercress | Cardamine ×incisa | CAIN20 | Brassicaceae | Dicot |
| bitternut hickory | Carya cordiformis | CACO15 | Juglandaceae | Dicot |
| bittersweet | Celastrus | CELAS | Celastraceae | Dicot |
| black ash | Fraxinus nigra | FRNI | Oleaceae | Dicot |
| black baneberry | Actaea racemosa | ACRA7 | Ranunculaceae | Dicot |
| black bindweed | Polygonum convolvulus | POCO10 | Polygonaceae | Dicot |
| black bindweed | Polygonum convolvulus var. convolvulus | POCOC2 | Polygonaceae | Dicot |
| black bugbane | Actaea racemosa var. racemosa | ACRAR | Ranunculaceae | Dicot |
| black cherry | Prunus serotina | PRSE2 | Rosaceae | Dicot |
| black cherry | Prunus serotina var. serotina | PRSES | Rosaceae | Dicot |
| black chokeberry | Photinia melanocarpa | PHME13 | Rosaceae | Dicot |
| black crowberry | Empetrum nigrum | EMNI | Empetraceae | Dicot |
| black crowberry | Empetrum nigrum ssp. hermaphroditum | EMNIH | Empetraceae | Dicot |
| black edge sedge | Carex nigromarginata | CANI3 | Cyperaceae | Monocot |
| black elderberry | Sambucus nigra | SANI4 | Caprifoliaceae | Dicot |
| black hellebore | Helleborus niger | HENI6 | Ranunculaceae | Dicot |
| black henbane | Hyoscyamus niger | HYNI | Solanaceae | Dicot |
| black highbush blueberry | Vaccinium fuscatum | VAFU | Ericaceae | Dicot |
| black horehound | Ballota nigra | BANI | Lamiaceae | Dicot |
| black horehound | Ballota nigra var. nigra | BANIN | Lamiaceae | Dicot |
| black huckleberry | Gaylussacia baccata | GABA | Ericaceae | Dicot |
| black locust | Robinia pseudoacacia | ROPS | Fabaceae | Dicot |
| black maple | Acer nigrum | ACNI5 | Aceraceae | Dicot |
| black medick | Medicago lupulina | MELU | Fabaceae | Dicot |
| black mustard | Brassica nigra | BRNI | Brassicaceae | Dicot |
| black nightshade | Solanum nigrum | SONI | Solanaceae | Dicot |
| black oak | Quercus velutina | QUVE | Fagaceae | Dicot |
| black raspberry | Rubus occidentalis | RUOC | Rosaceae | Dicot |
| black spruce | Picea mariana | PIMA | Pinaceae | Gymnosperm |
| black walnut | Juglans nigra | JUNI | Juglandaceae | Dicot |
| black willow | Salix nigra | SANI | Salicaceae | Dicot |
| blackberry | Rubus | RUBUS | Rosaceae | Dicot |
| blackberry lily | Belamcanda chinensis | BECH | Iridaceae | Monocot |
| blackeyed Susan | Rudbeckia hirta | RUHI2 | Asteraceae | Dicot |
| blackeyed Susan | Rudbeckia hirta var. hirta | RUHIH | Asteraceae | Dicot |
| blackeyed Susan | Rudbeckia hirta var. pulcherrima | RUHIP | Asteraceae | Dicot |
| blackfruit spikerush | Eleocharis melanocarpa | ELME | Cyperaceae | Monocot |
| blackgirdle bulrush | Scirpus atrocinctus | SCAT4 | 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. marilandica | QUMAM2 | Fagaceae | Dicot |
| blackseed plantain | Plantago rugelii | PLRU | Plantaginaceae | Dicot |
| blackseed plantain | Plantago rugelii var. rugelii | PLRUR | Plantaginaceae | Dicot |
| blackseed ricegrass | Patis racemosa | PARA2 | Poaceae | Monocot |
| blackseed speargrass | Piptochaetium avenaceum | PIAV | Poaceae | Monocot |
| blackspot hornpoppy | Glaucium corniculatum | GLCO3 | Papaveraceae | Dicot |
| blackthorn | Prunus spinosa | PRSP | Rosaceae | Dicot |
| bladder campion | Silene latifolia | SILA21 | Caryophyllaceae | Dicot |
| bladder campion | Silene latifolia ssp. alba | SILAA3 | Caryophyllaceae | Dicot |
| bladder senna | Colutea arborescens | COAR6 | Fabaceae | Dicot |
| bladderfern | Cystopteris | CYSTO | Dryopteridaceae | Fern |
| bladdernut | Staphylea | STAPH | Staphyleaceae | Dicot |
| bladderwort | Utricularia | UTRIC | Lentibulariaceae | Dicot |
| Blanchard"s hawthorn | Crataegus irrasa | CRIR2 | Rosaceae | Dicot |
| blanketflower | Gaillardia | GAILL | Asteraceae | Dicot |
| blanketflower | Gaillardia aristata | GAAR | Asteraceae | Dicot |
| blanketflower | Gaillardia ×grandiflora | GAGR11 | Asteraceae | Dicot |
| blazing star | Liatris | LIATR | Asteraceae | Dicot |
| bleeding heart | Lamprocapnos | LAMPR2 | Fumariaceae | Dicot |
| bleeding heart | Lamprocapnos spectabilis | LASP8 | Fumariaceae | Dicot |
| bleeding heart | Dicentra | DICEN | Fumariaceae | Dicot |
| blessed milkthistle | Silybum marianum | SIMA3 | Asteraceae | Dicot |
| blessed thistle | Cnicus benedictus | CNBE | Asteraceae | Dicot |
| blindeyes | Papaver dubium | PADU | Papaveraceae | Dicot |
| blister sedge | Carex vesicaria | CAVE6 | Cyperaceae | Monocot |
| blisterwort | Ranunculus recurvatus | RARE2 | Ranunculaceae | Dicot |
| blisterwort | Ranunculus recurvatus var. recurvatus | RARER2 | Ranunculaceae | Dicot |
| blite goosefoot | Chenopodium capitatum | CHCA4 | Chenopodiaceae | Dicot |
| bloodroot | Sanguinaria | SANGU | Papaveraceae | Dicot |
| bloodroot | Sanguinaria canadensis | SACA13 | Papaveraceae | Dicot |
| bloody geranium | Geranium sanguineum | GESA2 | Geraniaceae | Dicot |
| blue birch | Betula ×caerulea | BECA4 | Betulaceae | Dicot |
| blue birch | Betula ×caerulea var. caerulea | BECAC | Betulaceae | Dicot |
| blue bugle | Ajuga genevensis | AJGE | Lamiaceae | Dicot |
| blue cohosh | Caulophyllum thalictroides | CATH2 | Berberidaceae | Dicot |
| blue eyed Mary | Collinsia | COLLI | Scrophulariaceae | Dicot |
| blue fenugreek | Trigonella caerulea | TRCA14 | Fabaceae | Dicot |
| blue fieldmadder | Sherardia arvensis | SHAR2 | Rubiaceae | Dicot |
| blue flax | Linum perenne | LIPE2 | Linaceae | Dicot |
| blue giant hyssop | Agastache foeniculum | AGFO | Lamiaceae | Dicot |
| blue grama | Bouteloua gracilis | BOGR2 | Poaceae | Monocot |
| blue huckleberry | Gaylussacia frondosa | GAFR2 | Ericaceae | Dicot |
| blue lettuce | Lactuca tatarica | LATA | Asteraceae | Dicot |
| blue lettuce | Lactuca tatarica var. pulchella | LATAP | Asteraceae | Dicot |
| blue maidencane | Amphicarpum purshii | AMPU6 | Poaceae | Monocot |
| blue mistflower | Conoclinium coelestinum | COCO13 | Asteraceae | Dicot |
| blue plantain lily | Hosta ventricosa | HOVE | Liliaceae | Monocot |
| Blue Ridge blueberry | Vaccinium pallidum | VAPA4 | Ericaceae | Dicot |
| Blue Ridge sedge | Carex lucorum | CALU17 | Cyperaceae | Monocot |
| Blue Ridge sedge | Carex lucorum var. lucorum | CALUL | Cyperaceae | 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 spruce | Picea pungens | PIPU | Pinaceae | Gymnosperm |
| blue waxweed | Cuphea viscosissima | CUVI | Lythraceae | Dicot |
| blue wild indigo | Baptisia australis | BAAU | Fabaceae | Dicot |
| blue wild indigo | Baptisia australis var. australis | BAAUA | 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 |
| bluebead | Clintonia | CLINT | Liliaceae | Monocot |
| bluebead | Clintonia borealis | CLBO3 | Liliaceae | Monocot |
| bluebell bellflower | Campanula rotundifolia | CARO2 | Campanulaceae | Dicot |
| bluebells | Mertensia | MERTE | Boraginaceae | Dicot |
| blueberry | Vaccinium ×marianum | VAMA2 | Ericaceae | Dicot |
| blueberry | Vaccinium | VACCI | Ericaceae | Dicot |
| blueberry | Vaccinium ×atlanticum | VAAT3 | Ericaceae | Dicot |
| blueberry | Vaccinium ×dobbinii | VADO | Ericaceae | Dicot |
| bluecurls | Trichostema | TRICH9 | Lamiaceae | Dicot |
| bluegrass | Poa | POA | Poaceae | Monocot |
| bluehead gilia | Gilia capitata | GICA5 | Polemoniaceae | Dicot |
| bluehead gilia | Gilia capitata ssp. capitata | GICAC3 | Polemoniaceae | Dicot |
| bluehearts | Buchnera | BUCHN | Scrophulariaceae | Dicot |
| bluejacket | Tradescantia ohiensis | TROH | Commelinaceae | Monocot |
| bluejoint | Calamagrostis canadensis | CACA4 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis var. canadensis | CACAC10 | Poaceae | Monocot |
| bluejoint | Calamagrostis canadensis var. langsdorffii | CACAL3 | Poaceae | Monocot |
| bluestar | Amsonia | AMSON | Apocynaceae | Dicot |
| bluestem | Andropogon | ANDRO2 | Poaceae | Monocot |
| bluestem pricklypoppy | Argemone albiflora | ARAL3 | Papaveraceae | Dicot |
| bluestem pricklypoppy | Argemone albiflora ssp. albiflora | ARALA2 | Papaveraceae | Dicot |
| bluet | Houstonia | HOUST | Rubiaceae | Dicot |
| blunt broom sedge | Carex tribuloides | CATR7 | Cyperaceae | Monocot |
| blunt broom sedge | Carex tribuloides var. tribuloides | CATRT2 | Cyperaceae | Monocot |
| blunt spikerush | Eleocharis obtusa | ELOB2 | Cyperaceae | Monocot |
| bluntleaf bedstraw | Galium obtusum | GAOB | Rubiaceae | Dicot |
| bluntleaf bedstraw | Galium obtusum ssp. obtusum | GAOBO | Rubiaceae | Dicot |
| bluntleaf pondweed | Potamogeton obtusifolius | POOB2 | Potamogetonaceae | Monocot |
| bluntleaf sandwort | Moehringia lateriflora | MOLA6 | Caryophyllaceae | Dicot |
| bluntleaf waterleaf | Hydrophyllum canadense | HYCA3 | Hydrophyllaceae | Dicot |
| bluntleaved orchid | Platanthera obtusata | PLOB | Orchidaceae | Monocot |
| bluntleaved orchid | Platanthera obtusata ssp. obtusata | PLOBO3 | Orchidaceae | Monocot |
| bluntlobe cliff fern | Woodsia obtusa | WOOB2 | Dryopteridaceae | Fern |
| bluntlobe cliff fern | Woodsia obtusa ssp. obtusa | WOOBO | Dryopteridaceae | Fern |
| bluntlobe grapefern | Botrychium oneidense | BOON | Ophioglossaceae | Fern |
| bog aster | Oclemena nemoralis | OCNE2 | Asteraceae | Dicot |
| bog birch | Betula pumila | BEPU4 | Betulaceae | Dicot |
| bog birch | Betula pumila var. glandulifera | BEPUG | Betulaceae | Dicot |
| bog birch | Betula pumila var. pumila | BEPUP2 | Betulaceae | Dicot |
| bog blueberry | Vaccinium uliginosum | VAUL | Ericaceae | Dicot |
| bog bluegrass | Poa paludigena | POPA | Poaceae | Monocot |
| bog bulrush | Schoenoplectiella mucronata | SCMU15 | Cyperaceae | Monocot |
| bog chickweed | Stellaria alsine | STAL4 | Caryophyllaceae | Dicot |
| bog fern | Thelypteris simulata | THSI2 | Thelypteridaceae | Fern |
| bog goldenrod | Solidago uliginosa | SOUL | Asteraceae | Dicot |
| bog goldenrod | Solidago uliginosa var. levipes | SOULL | Asteraceae | Dicot |
| bog goldenrod | Solidago uliginosa var. linoides | SOULL2 | Asteraceae | Dicot |
| bog goldenrod | Solidago uliginosa var. uliginosa | SOULU | Asteraceae | Dicot |
| bog Labrador tea | Ledum groenlandicum | LEGR | Ericaceae | Dicot |
| bog laurel | Kalmia polifolia | KAPO | Ericaceae | Dicot |
| bog muhly | Muhlenbergia uniflora | MUUN | Poaceae | Monocot |
| bog rosemary | Andromeda | ANDRO | Ericaceae | Dicot |
| bog rosemary | Andromeda polifolia | ANPO | Ericaceae | Dicot |
| bog rosemary | Andromeda polifolia var. glaucophylla | ANPOG | Ericaceae | Dicot |
| bog rosemary | Andromeda polifolia var. polifolia | ANPOP | Ericaceae | Dicot |
| 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 willow | Salix pedicellaris | SAPE2 | Salicaceae | Dicot |
| bog willowherb | Epilobium leptophyllum | EPLE2 | Onagraceae | Dicot |
| bog yellowcress | Rorippa palustris | ROPA2 | Brassicaceae | Dicot |
| bog yellowcress | Rorippa palustris ssp. palustris | ROPAP | Brassicaceae | Dicot |
| bog yelloweyed grass | Xyris difformis | XYDI | Xyridaceae | Monocot |
| bog yelloweyed grass | Xyris difformis var. difformis | XYDID | Xyridaceae | Monocot |
| Bohemian knotweed | Polygonum ×bohemicum | POBO10 | Polygonaceae | Dicot |
| Bonjean"s dicranum moss | Dicranum bonjeanii | DIBO70 | Dicranaceae | Moss |
| borage | Borago | BORAG | Boraginaceae | Dicot |
| border privet | Ligustrum obtusifolium | LIOB | Oleaceae | Dicot |
| boreal bedstraw | Galium kamtschaticum | GAKA | Rubiaceae | Dicot |
| boreal bog sedge | Carex magellanica | CAMA12 | Cyperaceae | Monocot |
| boreal bog sedge | Carex magellanica ssp. irrigua | CAMAI2 | Cyperaceae | Monocot |
| boreal starwort | Stellaria borealis | STBO3 | Caryophyllaceae | Dicot |
| boreal starwort | Stellaria borealis ssp. borealis | STBOB | Caryophyllaceae | Dicot |
| Bosc"s panicgrass | Dichanthelium boscii | DIBO2 | Poaceae | Monocot |
| Boston ivy | Parthenocissus tricuspidata | PATR6 | Vitaceae | Dicot |
| bottle gentian | Gentiana clausa | GECL | Gentianaceae | Dicot |
| bottle gourd | Lagenaria siceraria | LASI | Cucurbitaceae | Dicot |
| bottlebrush buckeye | Aesculus parviflora | AEPA2 | Hippocastanaceae | Dicot |
| bottlebrush sedge | Carex hystericina | CAHY4 | Cyperaceae | Monocot |
| bottomland aster | Symphyotrichum ontarionis | SYON2 | Asteraceae | Dicot |
| bouncingbet | Saponaria officinalis | SAOF4 | Caryophyllaceae | Dicot |
| Bourbon rose | Rosa ×borboniana | ROBO3 | Rosaceae | Dicot |
| Bourgeau"s pepperweed | Lepidium ramosissimum var. bourgeauanum | LERAB2 | Brassicaceae | Dicot |
| Bowman"s root | Gillenia trifoliata | GITR6 | Rosaceae | Dicot |
| box knotweed | Polygonum buxiforme | POBU2 | Polygonaceae | Dicot |
| boxelder | Acer negundo | ACNE2 | Aceraceae | Dicot |
| boxelder | Acer negundo var. negundo | ACNEN | Aceraceae | Dicot |
| boxelder | Acer negundo var. violaceum | ACNEV | Aceraceae | Dicot |
| boxwood | Buxus | BUXUS | Buxaceae | Dicot |
| brachythecium moss | Brachythecium | BRACH10 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium oxycladon | BROX2 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium plumosum | BRPL5 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium populeum | BRPO4 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium rivulare | BRRI5 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium rutabulum | BRRU5 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium salebrosum | BRSA7 | Brachytheciaceae | Moss |
| brachythecium moss | Brachythecium velutinum | BRVE7 | Brachytheciaceae | Moss |
| brackenfern | Pteridium | PTERI | Dennstaedtiaceae | Fern |
| Bradley"s spleenwort | Asplenium bradleyi | ASBR2 | Aspleniaceae | Fern |
| Brainerd"s hawthorn | Crataegus brainerdii | CRBR3 | Rosaceae | Dicot |
| brake fern | Pteris | PTERI2 | Pteridaceae | Fern |
| branched bur-reed | Sparganium androcladum | SPAN | Sparganiaceae | Monocot |
| branched centaury | Centaurium pulchellum | CEPU3 | Gentianaceae | Dicot |
| brasenia | Brasenia | BRASE | Cabombaceae | Dicot |
| Braun"s hollyfern | Polystichum braunii | POBR4 | Dryopteridaceae | Fern |
| Brazilian watermeal | Wolffia brasiliensis | WOBR | Lemnaceae | Monocot |
| Brazilian waterweed | Egeria densa | EGDE | Hydrocharitaceae | Monocot |
| bridalwreath spirea | Spiraea prunifolia | SPPR | Rosaceae | Dicot |
| bride"s feathers | Aruncus dioicus | ARDI8 | Rosaceae | Dicot |
| bride"s feathers | Aruncus dioicus var. dioicus | ARDID2 | Rosaceae | Dicot |
| bride"s feathers | Aruncus dioicus var. vulgaris | ARDIV | Rosaceae | Dicot |
| bright green spikerush | Eleocharis olivacea | ELOL | Cyperaceae | Monocot |
| bright green spikerush | Eleocharis olivacea var. olivacea | ELOLO | Cyperaceae | Monocot |
| brightblue speedwell | Veronica serpyllifolia ssp. humifusa | VESEH2 | Scrophulariaceae | Dicot |
| brightgreen spleenwort | Asplenium trichomanes-ramosum | ASTR10 | Aspleniaceae | Fern |
| brightwhite | Prenanthella exigua | PREX | Asteraceae | Dicot |
| bristle berry | Rubus notatus | RUNO2 | Rosaceae | Dicot |
| bristle fern | Trichomanes | TRICH5 | Hymenophyllaceae | Fern |
| bristlefruit hedgeparsley | Torilis leptophylla | TOLE2 | Apiaceae | Dicot |
| bristlegrass | Setaria | SETAR | Poaceae | Monocot |
| bristleleaf sedge | Carex eburnea | CAEB2 | Cyperaceae | Monocot |
| bristly buttercup | Ranunculus hispidus | RAHI | Ranunculaceae | Dicot |
| bristly buttercup | Ranunculus hispidus var. caricetorum | RAHIC | Ranunculaceae | Dicot |
| bristly buttercup | Ranunculus hispidus var. hispidus | RAHIH | Ranunculaceae | Dicot |
| bristly buttercup | Ranunculus hispidus var. nitidus | RAHIN | Ranunculaceae | Dicot |
| bristly dewberry | Rubus hispidus | RUHI | Rosaceae | Dicot |
| bristly dogstail grass | Cynosurus echinatus | CYEC | Poaceae | Monocot |
| bristly greenbrier | Smilax tamnoides | SMTA2 | Smilacaceae | Monocot |
| bristly hawkbit | Leontodon hispidus | LEHI | Asteraceae | Dicot |
| bristly hawkbit | Leontodon hispidus ssp. danubialis | LEHID | 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 Oswego blackberry | Rubus dissimilis | RUDI3 | Rosaceae | Dicot |
| bristly oxtongue | Picris echioides | PIEC | Asteraceae | Dicot |
| bristly sarsaparilla | Aralia hispida | ARHI2 | Araliaceae | Dicot |
| bristly scaleseed | Spermolepis echinata | SPEC2 | Apiaceae | Dicot |
| bristlystalked sedge | Carex leptalea | CALE10 | Cyperaceae | Monocot |
| bristlystalked sedge | Carex leptalea ssp. leptalea | CALEL4 | Cyperaceae | Monocot |
| British alkaligrass | Puccinellia rupestris | PURU | Poaceae | Monocot |
| British soldier lichen | Cladonia cristatella | CLCR2 | Cladoniaceae | Lichen |
| British timothy | Phleum paniculatum | PHPA8 | Poaceae | Monocot |
| British yellowhead | Inula britannica | INBR | Asteraceae | Dicot |
| brittle bladderfern | Cystopteris fragilis | CYFR2 | Dryopteridaceae | Fern |
| brittle waternymph | Najas minor | NAMI | Najadaceae | Monocot |
| brittlestem hempnettle | Galeopsis tetrahit | GATE2 | Lamiaceae | Dicot |
| brittlestem hempnettle | Galeopsis tetrahit var. tetrahit | GATET2 | Lamiaceae | Dicot |
| broad beechfern | Phegopteris hexagonoptera | PHHE11 | Thelypteridaceae | Fern |
| broad looseflower sedge | Carex laxiflora | CALA19 | Cyperaceae | Monocot |
| broad looseflower sedge | Carex laxiflora var. laxiflora | CALAL5 | Cyperaceae | Monocot |
| broadfruit bur-reed | Sparganium eurycarpum | SPEU | Sparganiaceae | Monocot |
| broadleaf arrowhead | Sagittaria latifolia | SALA2 | Alismataceae | Monocot |
| broadleaf bluegrass | Poa chaixii | POCH | 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 hawthorn | Crataegus dilatata | CRDI | Rosaceae | Dicot |
| broadleaf helleborine | Epipactis helleborine | EPHE | Orchidaceae | Monocot |
| broadleaf rosette grass | Dichanthelium latifolium | DILA8 | Poaceae | Monocot |
| broadleaf sedge | Carex platyphylla | CAPL5 | Cyperaceae | Monocot |
| broadleaf Solomon"s seal | Polygonatum hirsutum | POHI13 | Liliaceae | Monocot |
| broadleaf speedwell | Veronica austriaca | VEAU | Scrophulariaceae | Dicot |
| broadleaf speedwell | Veronica austriaca ssp. teucrium | VEAUT | Scrophulariaceae | Dicot |
| broadleaf spurge | Euphorbia platyphyllos | EUPL | Euphorbiaceae | Dicot |
| broadleaf wild leek | Allium ampeloprasum | ALAM | Liliaceae | Monocot |
| broadleaved pepperweed | Lepidium latifolium | LELA2 | Brassicaceae | Dicot |
| broadlipped twayblade | Listera convallarioides | LICO5 | Orchidaceae | 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 |
| brookweed | Samolus | SAMOL | Primulaceae | Dicot |
| broom | Genista | GENIS | Fabaceae | Dicot |
| broom | Cytisus | CYTIS | Fabaceae | Dicot |
| broom brome | Bromus scoparius | BRSC3 | Poaceae | Monocot |
| broom crowberry | Corema conradii | COCO9 | Empetraceae | Dicot |
| broom sedge | Carex scoparia | CASC11 | Cyperaceae | Monocot |
| broom sedge | Carex scoparia var. scoparia | CASCS | Cyperaceae | Monocot |
| broom sedge | Carex scoparia var. tessellata | CASCT | Cyperaceae | Monocot |
| broom snakeweed | Gutierrezia sarothrae | GUSA2 | Asteraceae | Dicot |
| 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 |
| brotherella moss | Brotherella | BROTH2 | Sematophyllaceae | Moss |
| broussonetia | Broussonetia | BROUS | Moraceae | Dicot |
| brown beaksedge | Rhynchospora fusca | RHFU | Cyperaceae | Monocot |
| brown mustard | Brassica juncea | BRJU | Brassicaceae | Dicot |
| brown widelip orchid | Liparis liliifolia | LILI3 | Orchidaceae | Monocot |
| browneyed Susan | Rudbeckia triloba | RUTR2 | Asteraceae | Dicot |
| browneyed Susan | Rudbeckia triloba var. triloba | RUTRT | Asteraceae | Dicot |
| brownfruit rush | Juncus pelocarpus | JUPE | Juncaceae | Monocot |
| brownish beaksedge | Rhynchospora capitellata | RHCA12 | Cyperaceae | Monocot |
| brownish sedge | Carex brunnescens | CABR15 | Cyperaceae | Monocot |
| brownish sedge | Carex brunnescens ssp. brunnescens | CABRB3 | Cyperaceae | Monocot |
| brownish sedge | Carex brunnescens ssp. sphaerostachya | CABRS | Cyperaceae | Monocot |
| brownray knapweed | Centaurea jacea | CEJA | Asteraceae | Dicot |
| browntop | Microstegium | MICRO7 | Poaceae | Monocot |
| bruchia moss | Bruchia | BRUCH | Bruchiaceae | Moss |
| bruchia moss | Bruchia flexuosa | BRFL3 | Bruchiaceae | Moss |
| brunnera | Brunnera | BRUNN2 | Boraginaceae | Dicot |
| bryhnia moss | Bryhnia | BRYHN | Brachytheciaceae | Moss |
| bryoandersonia moss | Bryoandersonia | BRYOA | Brachytheciaceae | Moss |
| bryoandersonia moss | Bryoandersonia illecebra | BRIL | Brachytheciaceae | Moss |
| bryoid fissidens moss | Fissidens bryoides | FIBR70 | Fissidentaceae | Moss |
| bryum moss | Bryum | BRYUM2 | Bryaceae | Moss |
| bryum moss | Bryum lisae | BRLI3 | Bryaceae | Moss |
| buckbean | Menyanthes | MENYA | Menyanthaceae | Dicot |
| buckbean | Menyanthes trifoliata | METR3 | Menyanthaceae | Dicot |
| buckeye | Aesculus | AESCU | Hippocastanaceae | Dicot |
| buckhorn plantain | Plantago coronopus | PLCO3 | Plantaginaceae | Dicot |
| buckthorn | Rhamnus | RHAMN | Rhamnaceae | Dicot |
| buckthorn | Frangula | FRANG | Rhamnaceae | Dicot |
| buckwheat | Fagopyrum | FAGOP2 | Polygonaceae | Dicot |
| buckwheat | Fagopyrum esculentum | FAES2 | Polygonaceae | Dicot |
| buffalo hawthorn | Crataegus xanthophylla | CRXA | Rosaceae | Dicot |
| buffalo nut | Pyrularia pubera | PYPU | Santalaceae | Dicot |
| buffaloberry | Shepherdia | SHEPH | Elaeagnaceae | Dicot |
| buffalobur nightshade | Solanum rostratum | SORO | Solanaceae | Dicot |
| buffelgrass | Pennisetum ciliare | PECI | Poaceae | Monocot |
| bugle | Ajuga | AJUGA | Lamiaceae | Dicot |
| bugloss | Anchusa | ANCHU | Boraginaceae | Dicot |
| buglossoides | Buglossoides | BUGLO | Boraginaceae | Dicot |
| bugseed | Corispermum hyssopifolium | COHY | Chenopodiaceae | Dicot |
| bugseed | Corispermum | CORIS | Chenopodiaceae | Dicot |
| Bukhara fleeceflower | Polygonum baldschuanicum | POBA3 | Polygonaceae | Dicot |
| bulblet bladderfern | Cystopteris bulbifera | CYBU3 | Dryopteridaceae | Fern |
| bulblet-bearing water hemlock | Cicuta bulbifera | CIBU | Apiaceae | Dicot |
| bulbous bittercress | Cardamine bulbosa | CABU3 | Brassicaceae | Dicot |
| bulbous bluegrass | Poa bulbosa | POBU | Poaceae | Monocot |
| bulbous woodrush | Luzula bulbosa | LUBU | Juncaceae | Monocot |
| bull thistle | Cirsium vulgare | CIVU | Asteraceae | Dicot |
| bulrush | Schoenoplectus | SCHOE6 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus ×carinatus | SCCA25 | Cyperaceae | Monocot |
| bulrush | Schoenoplectiella | SCHOE7 | Cyperaceae | Monocot |
| bulrush | Schoenoplectus ×oblongus | SCOB10 | Cyperaceae | Monocot |
| bulrush | Scirpoides | SCIRP2 | Cyperaceae | Monocot |
| bulrush | Scirpus | SCIRP | Cyperaceae | Monocot |
| bulrush | Scirpus ×peckii | SCPE2 | Cyperaceae | Monocot |
| bulrush | Trichophorum | TRICH22 | Cyperaceae | Monocot |
| bunchberry dogwood | Cornus canadensis | COCA13 | Cornaceae | Dicot |
| bunched beaksedge | Rhynchospora cephalantha | RHCE | Cyperaceae | Monocot |
| bupleurum | Bupleurum | BUPLE | Apiaceae | Dicot |
| bur chervil | Anthriscus caucalis | ANCA14 | Apiaceae | Dicot |
| 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 |
| bur-reed sedge | Carex sparganioides | CASP3 | Cyperaceae | Monocot |
| burclover | Medicago polymorpha | MEPO3 | Fabaceae | Dicot |
| burdock | Arctium | ARCTI | Asteraceae | Dicot |
| burhead | Echinodorus | ECHIN6 | Alismataceae | Monocot |
| burnet | Sanguisorba | SANGU2 | Rosaceae | Dicot |
| burnet saxifrage | Pimpinella | PIMPI | Apiaceae | Dicot |
| Burnham"s blackberry | Rubus burnhamii | RUBU | Rosaceae | Dicot |
| burningbush | Euonymus atropurpureus | EUAT5 | Celastraceae | Dicot |
| burningbush | Euonymus alatus | EUAL13 | Celastraceae | Dicot |
| burningbush | Euonymus alatus var. alatus | EUALA2 | Celastraceae | Dicot |
| burningbush | Bassia scoparia | BASC5 | Chenopodiaceae | Dicot |
| burnweed | Erechtites | ERECH | Asteraceae | Dicot |
| bursting-heart | Euonymus americanus | EUAM9 | Celastraceae | Dicot |
| bush honeysuckle | Diervilla | DIERV | Caprifoliaceae | Dicot |
| bush vetch | Vicia sepium | VISE | Fabaceae | Dicot |
| bush vetch | Vicia sepium var. sepium | VISES | Fabaceae | Dicot |
| Bush"s goosefoot | Chenopodium berlandieri var. bushianum | CHBEB3 | Chenopodiaceae | Dicot |
| Bush"s sedge | Carex bushii | CABU5 | Cyperaceae | Monocot |
| bushy bluestem | Andropogon glomeratus | ANGL2 | Poaceae | Monocot |
| bushy bluestem | Andropogon glomeratus var. glomeratus | ANGLG2 | Poaceae | Monocot |
| bushy frostweed | Helianthemum dumosum | HEDU | Cistaceae | 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 St. Johnswort | Hypericum densiflorum | HYDE | Clusiaceae | Dicot |
| butomus | Butomus | BUTOM | Butomaceae | Monocot |
| butter and eggs | Linaria vulgaris | LIVU2 | Scrophulariaceae | Dicot |
| butterbur | Petasites | PETAS | Asteraceae | Dicot |
| buttercup | Ranunculus | RANUN | Ranunculaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa | ASTU | Asclepiadaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa ssp. interior | ASTUI | Asclepiadaceae | Dicot |
| butterfly milkweed | Asclepias tuberosa ssp. tuberosa | ASTUT2 | Asclepiadaceae | Dicot |
| butterflybush | Buddleja | BUDDL2 | Buddlejaceae | Dicot |
| butternut | Juglans cinerea | JUCI | Juglandaceae | Dicot |
| butterwort | Pinguicula | PINGU | Lentibulariaceae | Dicot |
| button sedge | Carex bullata | CABU7 | Cyperaceae | Monocot |
| buttonbush | Cephalanthus | CEPHA | Rubiaceae | Dicot |
| buttonbush dodder | Cuscuta cephalanthi | CUCE | Cuscutaceae | Dicot |
| buttonweed | Diodia | DIODI | Rubiaceae | Dicot |
| Buxbaum"s sedge | Carex buxbaumii | CABU6 | Cyperaceae | Monocot |
| buxbaumia moss | Buxbaumia | BUXBA2 | Buxbaumiaceae | Moss |
| buxbaumia moss | Buxbaumia aphylla | BUAP70 | Buxbaumiaceae | Moss |
| cabbage | Brassica oleracea | BROL | Brassicaceae | Dicot |
| cabbage rose | Rosa centifolia | ROCE | Rosaceae | Dicot |
| calamint | Calamintha | CALAM4 | Lamiaceae | Dicot |
| calamus | Acorus calamus | ACCA4 | Acoraceae | Monocot |
| calcareous brachythecium moss | Brachythecium calcareum | BRCA70 | Brachytheciaceae | Moss |
| calibrachoa | Calibrachoa | CALIB | Solanaceae | Dicot |
| calico aster | Symphyotrichum lateriflorum | SYLA4 | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. angustifolium | SYLAA | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. horizontale | SYLAH5 | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. lateriflorum | SYLAL7 | Asteraceae | Dicot |
| calico aster | Symphyotrichum lateriflorum var. tenuipes | SYLAT | Asteraceae | Dicot |
| California gilia | Gilia achilleifolia | GIAC2 | Polemoniaceae | Dicot |
| California gilia | Gilia achilleifolia ssp. achilleifolia | GIACA | Polemoniaceae | Dicot |
| California nettle | Urtica dioica ssp. gracilis | URDIG | Urticaceae | Dicot |
| California poppy | Eschscholzia | ESCHS | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica | ESCA2 | Papaveraceae | Dicot |
| California poppy | Eschscholzia californica ssp. californica | ESCAC | Papaveraceae | Dicot |
| California privet | Ligustrum ovalifolium | LIOV | Oleaceae | Dicot |
| California red fir | Abies magnifica | ABMA | Pinaceae | Gymnosperm |
| callalily | Calla | CALLA | Araceae | Monocot |
| Callery pear | Pyrus calleryana | PYCA80 | Rosaceae | Dicot |
| callicladium moss | Callicladium | CALLI9 | Hypnaceae | Moss |
| callicladium moss | Callicladium haldanianum | CAHA32 | Hypnaceae | Moss |
| calliergon moss | Calliergon | CALLI10 | Amblystegiaceae | Moss |
| calliergon moss | Calliergon cordifolium | CACO70 | Amblystegiaceae | Moss |
| calliergonella moss | Calliergonella | CALLI11 | Amblystegiaceae | Moss |
| calliergonella moss | Calliergonella cuspidata | CACU18 | Amblystegiaceae | Moss |
| callistephus | Callistephus | CALLI8 | Asteraceae | Dicot |
| camphorweed | Pluchea | PLUCH | Asteraceae | Dicot |
| camphorweed | Heterotheca subaxillaris | HESU3 | Asteraceae | Dicot |
| campion | Lychnis | LYCHN | Caryophyllaceae | Dicot |
| campsis | Campsis | CAMPS | Bignoniaceae | Dicot |
| campylium moss | Campylium | CAMPY3 | Amblystegiaceae | Moss |
| campylium moss | Campylium radicale | CARA18 | Amblystegiaceae | Moss |
| Canada bluegrass | Poa compressa | POCO | Poaceae | Monocot |
| Canada cocklebur | Xanthium strumarium var. canadense | XASTC | Asteraceae | Dicot |
| Canada germander | Teucrium canadense | TECA3 | Lamiaceae | Dicot |
| Canada germander | Teucrium canadense var. canadense | TECAC | Lamiaceae | Dicot |
| Canada goldenrod | Solidago altissima | SOAL6 | Asteraceae | Dicot |
| Canada goldenrod | Solidago canadensis | SOCA6 | Asteraceae | Dicot |
| Canada goldenrod | Solidago canadensis var. canadensis | SOCAC3 | Asteraceae | Dicot |
| Canada lettuce | Lactuca canadensis | LACA | Asteraceae | Dicot |
| Canada lily | Lilium canadense | LICA3 | Liliaceae | Monocot |
| Canada lily | Lilium canadense ssp. canadense | LICAC | Liliaceae | Monocot |
| Canada lily | Lilium canadense ssp. editorum | LICAE | Liliaceae | Monocot |
| Canada mayflower | Maianthemum canadense | MACA4 | Liliaceae | Monocot |
| Canada thistle | Cirsium arvense | CIAR4 | Asteraceae | Dicot |
| Canada toadflax | Nuttallanthus canadensis | NUCA | Scrophulariaceae | Dicot |
| Canada wildrye | Elymus canadensis | ELCA4 | Poaceae | Monocot |
| Canada yew | Taxus canadensis | TACA7 | Taxaceae | Gymnosperm |
| Canadian anemone | Anemone canadensis | ANCA8 | Ranunculaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis | SACA15 | Apiaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis var. canadensis | SACAC2 | Apiaceae | Dicot |
| Canadian blacksnakeroot | Sanicula canadensis var. grandis | SACAG2 | Apiaceae | Dicot |
| Canadian burnet | Sanguisorba canadensis | SACA14 | Rosaceae | Dicot |
| Canadian clearweed | Pilea pumila var. pumila | PIPUP | Urticaceae | Dicot |
| Canadian clearweed | Pilea pumila | PIPU2 | Urticaceae | Dicot |
| Canadian hawkweed | Hieracium kalmii var. fasciculatum | HIKAF | Asteraceae | Dicot |
| Canadian honewort | Cryptotaenia canadensis | CRCA9 | Apiaceae | Dicot |
| Canadian horseweed | Conyza canadensis | COCA5 | Asteraceae | Dicot |
| Canadian horseweed | Conyza canadensis var. canadensis | COCAC3 | Asteraceae | Dicot |
| Canadian 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 plum | Prunus nigra | PRNI | Rosaceae | Dicot |
| Canadian pussytoes | Antennaria howellii ssp. canadensis | ANHOC | Asteraceae | Dicot |
| Canadian ricegrass | Piptatheropsis canadensis | PICA19 | Poaceae | Monocot |
| Canadian rush | Juncus canadensis | JUCA3 | Juncaceae | Monocot |
| Canadian sandspurry | Spergularia canadensis | SPCA3 | Caryophyllaceae | Dicot |
| Canadian sandspurry | Spergularia canadensis var. canadensis | SPCAC | Caryophyllaceae | Dicot |
| Canadian serviceberry | Amelanchier canadensis | AMCA4 | Rosaceae | Dicot |
| Canadian summer bluet | Houstonia canadensis | HOCA5 | Rubiaceae | Dicot |
| Canadian waterweed | Elodea canadensis | ELCA7 | Hydrocharitaceae | Monocot |
| Canadian white violet | Viola canadensis | VICA4 | Violaceae | Dicot |
| Canadian white violet | Viola canadensis var. canadensis | VICAC | Violaceae | Dicot |
| Canadian wildginger | Asarum canadense | ASCA | Aristolochiaceae | Dicot |
| Canadian woodnettle | Laportea canadensis | LACA3 | Urticaceae | Dicot |
| canary violet | Viola ×primulifolia | VIPR4 | Violaceae | Dicot |
| canarygrass | Phalaris | PHALA2 | Poaceae | Monocot |
| cancer-root | Conopholis | CONOP | Orobanchaceae | Dicot |
| cancerwort | Kickxia | KICKX | Scrophulariaceae | Dicot |
| candle anemone | Anemone cylindrica | ANCY | Ranunculaceae | Dicot |
| candytuft | Iberis | IBERI | Brassicaceae | Dicot |
| cane | Arundinaria | ARUND2 | Poaceae | Monocot |
| cankerweed | Prenanthes serpentaria | PRSE | Asteraceae | Dicot |
| canna | Canna | CANNA2 | Cannaceae | Monocot |
| canna lily | Canna ×generalis | CAGE3 | Cannaceae | Monocot |
| cantaloupe | Cucumis melo | CUME | Cucurbitaceae | Dicot |
| capsella | Capsella | CAPSE | Brassicaceae | Dicot |
| caraway | Carum carvi | CACA19 | Apiaceae | Dicot |
| cardinalflower | Lobelia cardinalis | LOCA2 | Campanulaceae | Dicot |
| carelessweed | Cyclachaena | CYCLA4 | Asteraceae | Dicot |
| Carelessweed | Cyclachaena xanthiifolia | CYXA2 | Asteraceae | Dicot |
| carelessweed | Amaranthus palmeri | AMPA | Amaranthaceae | Dicot |
| Carey"s sedge | Carex careyana | CACA14 | Cyperaceae | Monocot |
| Carey"s smartweed | Polygonum careyi | POCA8 | Polygonaceae | Dicot |
| carline thistle | Carlina | CARLI | Asteraceae | Dicot |
| carline thistle | Carlina vulgaris | CAVU3 | Asteraceae | Dicot |
| carline thistle | Carlina vulgaris ssp. longifolia | CAVUL | Asteraceae | Dicot |
| Carolina draba | Draba reptans | DRRE2 | Brassicaceae | Dicot |
| Carolina fanwort | Cabomba caroliniana | CACA | Cabombaceae | Dicot |
| Carolina fanwort | Cabomba caroliniana var. caroliniana | CACAC4 | Cabombaceae | Dicot |
| Carolina fimbry | Fimbristylis caroliniana | FICA3 | Cyperaceae | Monocot |
| Carolina foxtail | Alopecurus carolinianus | ALCA4 | Poaceae | Monocot |
| Carolina geranium | Geranium carolinianum | GECA5 | Geraniaceae | Dicot |
| Carolina geranium | Geranium carolinianum var. carolinianum | GECAC4 | Geraniaceae | Dicot |
| Carolina geranium | Geranium carolinianum var. sphaerospermum | GECAS | Geraniaceae | Dicot |
| Carolina hawthorn | Crataegus arcana | CRAR7 | Rosaceae | Dicot |
| Carolina horsenettle | Solanum carolinense | SOCA3 | Solanaceae | Dicot |
| Carolina horsenettle | Solanum carolinense var. carolinense | SOCAC4 | Solanaceae | Dicot |
| Carolina mosquitofern | Azolla caroliniana | AZCA | Azollaceae | Fern |
| Carolina nutrush | Scleria pauciflora var. caroliniana | SCPAC | Cyperaceae | Monocot |
| Carolina poplar | Populus ×canadensis | POCA19 | Salicaceae | Dicot |
| Carolina puccoon | Lithospermum caroliniense | LICA13 | Boraginaceae | Dicot |
| Carolina puccoon | Lithospermum caroliniense var. croceum | LICAC9 | 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 |