| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BIRA3 | Biatorella rappii Zahlbr. | | Biatorellaceae
|
| BIRE2 | Biatorella resinae (Fr.) Th. Fr. | Sarea resinae | Agyriaceae
|
| BISI | Biatorella simplex (Davies) Branth & Rostrup | Polysporina simplex | Acarosporaceae
|
| BITE2 | Biatorella testudinea (Ach.) A. Massal. | Sporastatia testudinea | Acarosporaceae
|
| BIATO3 | Biatorella De Not. | biatorella | Biatorellaceae
|
| BIUS | Biatoropsis usnearum Rasanen | | Uncertain Lichen Family
|
| BIATO4 | Biatoropsis Rananen | biatoropsis | Uncertain Lichen Family
|
| BICA4 | Bicuculla canadensis (Goldie) Millsp. | Dicentra canadensis | Fumariaceae
|
| BICU2 | Bicuculla cucullaria (L.) Millsp. | Dicentra cucullaria | Fumariaceae
|
| BIEX | Bicuculla eximia (Ker-Gawl.) Millsp. | Dicentra eximia | Fumariaceae
|
| BIAC | Bidens acuta (Wieg.) Britt. | Bidens tripartita | Asteraceae
|
| BIALR | Bidens alba (L.) DC. var. radiata (Schultz-Bip.) Ballard ex T.E. Melchert | romerillo | Asteraceae
|
| BIAL | Bidens alba (L.) DC. | romerillo | Asteraceae
|
| BIAM3 | Bidens amplectens Sherff | kokolau | Asteraceae
|
| BIARF | Bidens aristosa (Michx.) Britt. var. fritcheyi Fern. | Bidens aristosa | Asteraceae
|
| BIARM | Bidens aristosa (Michx.) Britt. var. mutica (Gray) Gattinger | Bidens aristosa | Asteraceae
|
| BIARR | Bidens aristosa (Michx.) Britt. var. retrorsa (Sherff) Wunderlin | Bidens aristosa | Asteraceae
|
| BIAR | Bidens aristosa (Michx.) Britt. | bearded beggarticks | Asteraceae
|
| BIAS | Bidens asplenioides Sherff | Bidens cervicata | Asteraceae
|
| BIASS2 | Bidens asymmetrica (Levl.) Sherff var. subocculata O. Deg. & Sherff ex Sherff | Bidens forbesii ssp. forbesii | Asteraceae
|
| BIAS3 | Bidens asymmetrica (Levl.) Sherff | Koolau Range beggarticks | Asteraceae
|
| BIAUW | Bidens aurea (Ait.) Sherff var. wrightii (Gray) Sherff | Bidens aurea | Asteraceae
|
| BIAU | Bidens aurea (Ait.) Sherff | Arizona beggarticks | Asteraceae
|
| BIAW | Bidens awaluana O.& I. Deg. & Sherff | Bidens mauiensis | Asteraceae
|
| BIBE2 | Bidens beckii Torr. ex Spreng. | Megalodonta beckii var. beckii | Asteraceae
|
| BIBIM | Bidens bidentoides (Nutt.) Britt. var. mariana (Blake) Sherff | Bidens bidentoides | Asteraceae
|
| BIBI3 | Bidens bidentoides (Nutt.) Britt. | Delmarva beggarticks | Asteraceae
|
| BIBI | Bidens bigelovii Gray | Bigelow's beggarticks | Asteraceae
|
| BIBIB | Bidens bipinnata L. var. biternatoides Sherff | Bidens bipinnata | Asteraceae
|
| BIBIC | Bidens bipinnata L. var. cynapiifolia (Kunth) G. Maza | Bidens cynapiifolia | Asteraceae
|
| BIBI7 | Bidens bipinnata L. | Spanish needles | Asteraceae
|
| BICAC | Bidens campylotheca Schultz-Bip. ssp. campylotheca | viper beggarticks | Asteraceae
|
| BICAP | Bidens campylotheca Schultz-Bip. ssp. pentamera (Sherff) Ganders & Nagata | viper beggarticks | Asteraceae
|
| BICAW | Bidens campylotheca Schultz-Bip. ssp. waihoiensis St. John | Waihoi beggarticks | Asteraceae
|
| BICAP2 | Bidens campylotheca Schultz-Bip. var. pentamera Sherff | Bidens campylotheca ssp. pentamera | Asteraceae
|
| BICA2 | Bidens campylotheca Schultz-Bip. | viper beggarticks | Asteraceae
|
| BICA3 | Bidens caudatus (Kunth) Schultz-Bip. | Cosmos caudatus | Asteraceae
|
| BICED | Bidens cernua L. var. dentata (Nutt.) Boivin | Bidens cernua | Asteraceae
|
| BICEE | Bidens cernua L. var. elliptica Wieg. | Bidens cernua | Asteraceae
|
| BICEI | Bidens cernua L. var. integra Wieg. | Bidens cernua | Asteraceae
|
| BICEM | Bidens cernua L. var. minima (Huds.) Pursh | Bidens cernua | Asteraceae
|
| BICEO | Bidens cernua L. var. oligodonta Fern. & St. John | Bidens cernua | Asteraceae
|
| BICER | Bidens cernua L. var. radiata DC. | Bidens cernua | Asteraceae
|
| BICE | Bidens cernua L. | nodding beggartick | Asteraceae
|
| BICE2 | Bidens cervicata Sherff | Kauai beggarticks | Asteraceae
|
| BICO2 | Bidens coartata Sherff | Bidens sandvicensis ssp. sandvicensis | Asteraceae
|
| BICO3 | Bidens comosa (Gray) Wieg. | Bidens tripartita | Asteraceae
|
| BICO4 | Bidens conjuncta Sherff | bog beggarticks | Asteraceae
|
| BICOA | Bidens connata Muhl. ex Willd. var. ambiversa Fassett | Bidens connata | Asteraceae
|
| BICOA2 | Bidens connata Muhl. ex Willd. var. anomala Farw. | Bidens connata | Asteraceae
|
| BICOF | Bidens connata Muhl. ex Willd. var. fallax (Warnst.) Sherff | Bidens connata | Asteraceae
|
| BICOG | Bidens connata Muhl. ex Willd. var. gracilipes Fern. | Bidens connata | Asteraceae
|
| BICOI | Bidens connata Muhl. ex Willd. var. inundata Fern. | Bidens connata | Asteraceae
|
| BICOP | Bidens connata Muhl. ex Willd. var. petiolata (Nutt.) Farw. | Bidens connata | Asteraceae
|
| BICOP2 | Bidens connata Muhl. ex Willd. var. pinnata S. Wats. | Bidens connata | Asteraceae
|
| BICOS | Bidens connata Muhl. ex Willd. var. submutica Fassett | Bidens connata | Asteraceae
|
| BICO5 | Bidens connata Muhl. ex Willd. | purplestem beggarticks | Asteraceae
|
| BICOB | Bidens coronata (L.) Britt. var. brachyodonta Fern. | Bidens coronata | Asteraceae
|
| BICOT | Bidens coronata (L.) Britt. var. tenuiloba (Gray) Sherff | Bidens coronata | Asteraceae
|
| BICOT2 | Bidens coronata (L.) Britt. var. trichosperma (Michx.) Fern. | Bidens coronata | Asteraceae
|
| BICO | Bidens coronata (L.) Britt. | crowned beggarticks | Asteraceae
|
| BICOR | Bidens cosmoides (Gray) Sherff var. refracta Hochr. | Bidens cosmoides | Asteraceae
|
| BICO6 | Bidens cosmoides (Gray) Sherff | cosmosflower beggarticks | Asteraceae
|
| BICT | Bidens ctenophylla Sherff | Bidens micrantha ssp. ctenophylla | Asteraceae
|
| BICU | Bidens cuneata Sherff | wedge beggarticks | Asteraceae
|
| BICYP | Bidens cynapiifolia Kunth var. portoricensis (Spreng.) O.E. Schulz | Bidens cynapiifolia | Asteraceae
|
| BICYT | Bidens cynapiifolia Kunth var. tenuis O.E. Schulz | Bidens cynapiifolia | Asteraceae
|
| BICY | Bidens cynapiifolia Kunth | West Indian beggarticks | Asteraceae
|
| BIDEA | Bidens degeneri Sherff var. apioides Sherff | Bidens micrantha ssp. micrantha | Asteraceae
|
| BIDE2 | Bidens degeneri Sherff | Bidens micrantha ssp. micrantha | Asteraceae
|
| BIDI2 | Bidens �dimidiata O. Deg. & Sherff ex Sherff | Bidens cosmoides | Asteraceae
|
| BIDI | Bidens discoidea (Torr. & Gray) Britt. | small beggarticks | Asteraceae
|
| BIDI3 | Bidens distans Sherff | Bidens micrantha ssp. kalealaha | Asteraceae
|
| BIEAF | Bidens eatonii Fern. var. fallax Fern. | Bidens eatonii | Asteraceae
|
| BIEAI | Bidens eatonii Fern. var. illicita Blake | Bidens eatonii | Asteraceae
|
| BIEAI2 | Bidens eatonii Fern. var. interstes Fassett | Bidens eatonii | Asteraceae
|
| BIEAK | Bidens eatonii Fern. var. kennebecensis Fern. | Bidens eatonii | Asteraceae
|
| BIEAM | Bidens eatonii Fern. var. major Fassett | Bidens eatonii | Asteraceae
|
| BIEAM2 | Bidens eatonii Fern. var. mutabilis Fassett | Bidens eatonii | Asteraceae
|
| BIEAS | Bidens eatonii Fern. var. simulans Fassett | Bidens eatonii | Asteraceae
|
| BIEA | Bidens eatonii Fern. | Eaton's beggarticks | Asteraceae
|
| BIEL | Bidens elegans Greene | Bidens laevis | Asteraceae
|
| BIFE | Bidens fecunda O. Deg. & Sherff ex Sherff | Bidens cervicata | Asteraceae
|
| BIFE3 | Bidens ferax O. Deg. & Sherff | Bidens cervicata | Asteraceae
|
| BIFE2 | Bidens ferulifolia (Jacq.) DC. | Apache beggarticks | Asteraceae
|
| BIFOF | Bidens forbesii Sherff ssp. forbesii | coastalbluff beggarticks | Asteraceae
|
| BIFOK | Bidens forbesii Sherff ssp. kahiliensis Ganders & Nagata | Kahili beggarticks | Asteraceae
|
| BIFO | Bidens forbesii Sherff | coastalbluff beggarticks | Asteraceae
|
| BIFRA | Bidens frondosa L. var. anomala Porter ex Fern. | Bidens frondosa | Asteraceae
|
| BIFRC | Bidens frondosa L. var. caudata Sherff | Bidens frondosa | Asteraceae
|
| BIFRP | Bidens frondosa L. var. pallida Wieg. | Bidens frondosa | Asteraceae
|
| BIFRP2 | Bidens frondosa L. var. puberula Wieg. | Bidens vulgata | Asteraceae
|
| BIFRS | Bidens frondosa L. var. stenodonta Fern. & St. John | Bidens frondosa | Asteraceae
|
| BIFR | Bidens frondosa L. | devil's beggartick | Asteraceae
|
| BIFU | Bidens fulvescens Sherff | Bidens torta | Asteraceae
|
| BIGA | Bidens gardneri Baker | ridge beggartick | Asteraceae
|
| BIGL | Bidens glaucescens Greene | Bidens cernua | Asteraceae
|
| BIGR2 | Bidens gracilis Nutt. | Bidens amplectens | Asteraceae
|
| BIGR | Bidens graciloides Sherff | Bidens sandvicensis ssp. sandvicensis | Asteraceae
|
| BIHA2 | Bidens halawana O. Deg. & Sherff | Bidens amplectens | Asteraceae
|
| BIHA | Bidens hawaiensis Gray | Hawai'i beggarticks | Asteraceae
|