| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BAABD | Bahia absinthifolia Benth. var. dealbata (Gray) Gray | Dealbata's bahia | Asteraceae
|
| BAAB | Bahia absinthifolia Benth. | hairyseed bahia | Asteraceae
|
| BABI2 | Bahia bigelovii Gray | Bigelow's bahia | Asteraceae
|
| BABI3 | Bahia biternata Gray | slimlobe bahia | Asteraceae
|
| BADI | Bahia dissecta (Gray) Britt. | ragleaf bahia | Asteraceae
|
| BANE | Bahia neomexicana (Gray) Gray | Schkuhria multiflora | Asteraceae
|
| BANUD | Bahia nudicaulis Gray var. desertorum (M.E. Jones) Cronq. | Platyschkuhria integrifolia var. desertorum | Asteraceae
|
| BANUO | Bahia nudicaulis Gray var. oblongifolia (Gray) Cronq. | Platyschkuhria integrifolia var. oblongifolia | Asteraceae
|
| BANUO2 | Bahia nudicaulis Gray var. ourolepis (Blake) Cronq. | Platyschkuhria integrifolia var. ourolepis | Asteraceae
|
| BANU | Bahia nudicaulis Gray | Platyschkuhria integrifolia var. integrifolia | Asteraceae
|
| BAOB2 | Bahia oblongifolia (Gray) Gray | Platyschkuhria integrifolia var. oblongifolia | Asteraceae
|
| BAOP2 | Bahia oppositifolia (Nutt.) Gray | Picradeniopsis oppositifolia | Asteraceae
|
| BAOU | Bahia ourolepis Blake | Platyschkuhria integrifolia var. ourolepis | Asteraceae
|
| BAPE | Bahia pedata Gray | bluntscale bahia | Asteraceae
|
| BASC4 | Bahia schaffneri S. Wats. | Schaffner's bahia | Asteraceae
|
| BAWO2 | Bahia woodhousei (Gray) Gray | Picradeniopsis woodhousei | Asteraceae
|
| BAHIA | Bahia Lag. | bahia | Asteraceae
|
| BAMUP | Baileya multiradiata Harvey & Gray ex Gray var. pleniradiata (Harvey & Gray ex Gray) Coville | Baileya pleniradiata | Asteraceae
|
| BAMUT | Baileya multiradiata Harvey & Gray ex Gray var. thurberi (Rydb.) Kittell | Baileya multiradiata | Asteraceae
|
| BAMU | Baileya multiradiata Harvey & Gray ex Gray | desert marigold | Asteraceae
|
| BAPA | Baileya pauciradiata Harvey & Gray ex Gray | laxflower | Asteraceae
|
| BAPE2 | Baileya perennis (A. Nels.) Rydb. | Baileya pleniradiata | Asteraceae
|
| BAPL3 | Baileya pleniradiata Harvey & Gray ex Gray | woolly desert marigold | Asteraceae
|
| BAILE | Baileya Harvey & Gray ex Gray | desert marigold | Asteraceae
|
| BATO3 | Baillonella toxisperma Pierre | djave | Sapotaceae
|
| BAILL | Baillonella Pierre | baillonella | Sapotaceae
|
| BAAE | Balanites aegyptiaca (L.) Del. | desert date | Zygophyllaceae
|
| BAMA10 | Balanites maughamii Sprague | manduro | Zygophyllaceae
|
| BALAN | Balanites Del. | balanites | Zygophyllaceae
|
| BARA | Baldellia ranunculoides (L.) Parl. | lesser waterplantain | Alismataceae
|
| BALDE | Baldellia Parl. | waterplantain | Alismataceae
|
| BAAN3 | Balduina angustifolia (Pursh) B.L. Robins. | coastalplain honeycombhead | Asteraceae
|
| BAAT | Balduina atropurpurea Harper | purpledisk honeycombhead | Asteraceae
|
| BAUN | Balduina uniflora Nutt. | oneflower honeycombhead | Asteraceae
|
| BALDU | Balduina Nutt. | honeycombhead | Asteraceae
|
| BABO4 | Ballota borealis Schweig. | Ballota nigra var. foetida | Lamiaceae
|
| BANIF | Ballota nigra L. ssp. foetida Hayek | Ballota nigra var. foetida | Lamiaceae
|
| BANIA | Ballota nigra L. var. alba (L.) Sm. | black horehound | Lamiaceae
|
| BANIF2 | Ballota nigra L. var. foetida (Hayek) Vis. | black horehound | Lamiaceae
|
| BANIN | Ballota nigra L. var. nigra | black horehound | Lamiaceae
|
| BANI | Ballota nigra L. | black horehound | Lamiaceae
|
| BALLO | Ballota L. | horehound | Lamiaceae
|
| BAMAT2 | Balsamita major Desf. var. tanacetoides (Boiss.) Moldenke | Balsamita major | Asteraceae
|
| BAMA8 | Balsamita major Desf. | costmary | Asteraceae
|
| BALSA2 | Balsamita P. Mill. | balsamita | Asteraceae
|
| BABO3 | Balsamorhiza bolanderi Gray | Wyethia bolanderi | Asteraceae
|
| BABO | Balsamorhiza �bonseri St. John (pro sp.) | | Asteraceae
|
| BACAC | Balsamorhiza careyana Gray var. careyana | Carey's balsamroot | Asteraceae
|
| BACAI | Balsamorhiza careyana Gray var. intermedia Cronq. | intermediate balsamroot | Asteraceae
|
| BACA3 | Balsamorhiza careyana Gray | Carey's balsamroot | Asteraceae
|
| BADE2 | Balsamorhiza deltoidea Nutt. | deltoid balsamroot | Asteraceae
|
| BAHIL | Balsamorhiza hirsuta Nutt. var. lagocephala Sharp | Balsamorhiza hookeri var. lagocephala | Asteraceae
|
| BAHIN | Balsamorhiza hirsuta Nutt. var. neglecta Sharp | Balsamorhiza hookeri var. neglecta | Asteraceae
|
| BAHI | Balsamorhiza hirsuta Nutt. | Balsamorhiza hookeri var. hirsuta | Asteraceae
|
| BAHI2 | Balsamorhiza hispidula Sharp | Balsamorhiza hookeri var. hispidula | Asteraceae
|
| BAHOH | Balsamorhiza hookeri (Hook.) Nutt. var. hirsuta (Nutt.) A. Nels. | hairy balsamroot | Asteraceae
|
| BAHOH2 | Balsamorhiza hookeri (Hook.) Nutt. var. hispidula (Sharp) Cronq. | hairy balsamroot | Asteraceae
|
| BAHOH3 | Balsamorhiza hookeri (Hook.) Nutt. var. hookeri | Hooker's balsamroot | Asteraceae
|
| BAHOI | Balsamorhiza hookeri (Hook.) Nutt. var. idahoensis (Sharp) Cronq. | Idaho balsamroot | Asteraceae
|
| BAHOL | Balsamorhiza hookeri (Hook.) Nutt. var. lagocephala (Sharp) Cronq. | rabbithead balsamroot | Asteraceae
|
| BAHOL2 | Balsamorhiza hookeri Nutt. var. lanata Sharp | Balsamorhiza hookeri var. lagocephala | Asteraceae
|
| BAHON | Balsamorhiza hookeri (Hook.) Nutt. var. neglecta (Sharp) Cronq. | neglected balsamroot | Asteraceae
|
| BAHOP | Balsamorhiza hookeri Nutt. var. platylepis (Sharp) Cronq. | Balsamorhiza macrolepis var. platylepis | Asteraceae
|
| BAHO | Balsamorhiza hookeri Nutt. | Hooker's balsamroot | Asteraceae
|
| BAIN | Balsamorhiza incana Nutt. | hoary balsamroot | Asteraceae
|
| BAMAM | Balsamorhiza macrolepis Sharp var. macrolepis | California balsamroot | Asteraceae
|
| BAMAP | Balsamorhiza macrolepis Sharp var. platylepis (Sharp) Ferris | California balsamroot | Asteraceae
|
| BAMA3 | Balsamorhiza macrolepis Sharp | California balsamroot | Asteraceae
|
| BAMAI | Balsamorhiza macrophylla Nutt. var. idahoensis Sharp | Balsamorhiza hookeri var. idahoensis | Asteraceae
|
| BAMA4 | Balsamorhiza macrophylla Nutt. | cutleaf balsamroot | Asteraceae
|
| BAPL5 | Balsamorhiza platylepis Sharp | Balsamorhiza macrolepis var. platylepis | Asteraceae
|
| BARO2 | Balsamorhiza rosea A. Nels. & J.F. Macbr. | rosy balsamroot | Asteraceae
|
| BASA3 | Balsamorhiza sagittata (Pursh) Nutt. | arrowleaf balsamroot | Asteraceae
|
| BASE4 | Balsamorhiza sericea W.A. Weber | silky balsamroot | Asteraceae
|
| BASE2 | Balsamorhiza serrata A. Nels. & J.F. Macbr. | serrate balsamroot | Asteraceae
|
| BATE3 | Balsamorhiza �terebinthacea (Hook.) Nutt. (pro sp.) | | Asteraceae
|
| BATO2 | Balsamorhiza �tomentosa Rydb. (pro sp.) | | Asteraceae
|
| BALSA | Balsamorhiza Nutt. | balsamroot | Asteraceae
|
| BARE2 | Baltimora recta L. | beautyhead | Asteraceae
|
| BALTI | Baltimora L. | baltimora | Asteraceae
|
| BAAR8 | Bambusa arundinacea (Retz.) Willd. | bamboo | Poaceae
|
| BABE2 | Bambusa beecheyana Munro | Beechey's bamboo | Poaceae
|
| BAGL3 | Bambusa glaucescens (Willd.) Sieb. ex Munro | golden goddess bamboo | Poaceae
|
| BALO3 | Bambusa longifolia (Fourn.) McClure | longflower bamboo | Poaceae
|
| BALO4 | Bambusa longispiculata Gamble ex Brandis | bamboo | Poaceae
|
| BAMU2 | Bambusa ?multiplex (Lour.) Raeusch. ex J.A. & J.H. Schultes | hedge bamboo | Poaceae
|
| BAMU4 | Bambusa multiplex auct. non (Lour.) Raeusch. ex J.A. & J.H. Schultes | Bambusa glaucescens | Poaceae
|
| BAPO6 | Bambusa polymorpha Munro | polymorph bamboo | Poaceae
|
| BATE6 | Bambusa textilis McClure | textile bamboo | Poaceae
|
| BATU | Bambusa tulda Roxb. | bamboo | Poaceae
|
| BATU2 | Bambusa tuldoides Munro | puntingpole bamboo | Poaceae
|
| BAVU2 | Bambusa vulgaris Schrad. ex J.C. Wendl. | common bamboo | Poaceae
|
| BAMBU | Bambusa Schreb. | bamboo | Poaceae
|
| BAPO | Banara portoricensis Krug & Urban | Puerto Rico palo de ramon | Flacourtiaceae
|
| BAVA2 | Banara vanderbiltii Urban | Vanderbilt's palo de ramon | Flacourtiaceae
|
| BANAR | Banara Aubl. | palo de ramon | Flacourtiaceae
|
| BADI4 | Banisteria diversifolia Kunth | Stigmaphyllon diversifolium | Malpighiaceae
|
| BAEM2 | Banisteria emarginata Cav. | Stigmaphyllon emarginatum | Malpighiaceae
|
| BAFL | Banisteria floribunda DC. | Stigmaphyllon floribundum | Malpighiaceae
|
| BALA5 | Banisteria laurifolia L. | Heteropterys laurifolia | Malpighiaceae
|
| BALU5 | Banisteria lucida L.C. Rich. | Banisteriopsis lucida | Malpighiaceae
|