| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BODIO2 | Botrychium dissectum Spreng. var. oneidense (Gilbert) Farw. | Botrychium oneidense | Ophioglossaceae
|
| BODIT2 | Botrychium dissectum Spreng. var. tenuifolium (Underwood) Farw. | Botrychium biternatum | Ophioglossaceae
|
| BODI2 | Botrychium dissectum Spreng. | cutleaf grapefern | Ophioglossaceae
|
| BODU | Botrychium dusenii auct. non (Christ) Alston | Botrychium crenulatum | Ophioglossaceae
|
| BOEC | Botrychium echo W.H. Wagner | reflected grapefern | Ophioglossaceae
|
| BOGA2 | Botrychium gallicomontanum Farrar & Johnson-Groh | Frenchman's Bluff grapefern | Ophioglossaceae
|
| BOHE5 | Botrychium hesperium (Maxon & Clausen) W.H. Wagner & Lellinger | western moonwort | Ophioglossaceae
|
| BOJE | Botrychium jenmanii Underwood | Dixie grapefern | Ophioglossaceae
|
| BOLAA | Botrychium lanceolatum (Gmel.) Angstr. ssp. angustisegmentum (Pease & Moore) Clausen | Botrychium lanceolatum var. angustisegmentum | Ophioglossaceae
|
| BOLAT2 | Botrychium lanceolatum (Gmel.) Angstr. ssp. typicum Clausen | Botrychium lanceolatum var. lanceolatum | Ophioglossaceae
|
| BOLAA2 | Botrychium lanceolatum (Gmel.) Angstr. var. angustisegmentum Pease & Moore | lanceleaf grapefern | Ophioglossaceae
|
| BOLAL | Botrychium lanceolatum (Gmel.) Angstr. var. lanceolatum | lanceleaf grapefern | Ophioglossaceae
|
| BOLA | Botrychium lanceolatum (Gmel.) Angstr. | lanceleaf grapefern | Ophioglossaceae
|
| BOLI7 | Botrychium lineare W.H. Wagner | narrowleaf grapefern | Ophioglossaceae
|
| BOLUM3 | Botrychium lunaria (L.) Sw. ssp. minganense (Victorin) Calder & Taylor | Botrychium minganense | Ophioglossaceae
|
| BOLUO3 | Botrychium lunaria (L.) Sw. ssp. occidentale A.& D. L�ve & Kapoor | Botrychium hesperium | Ophioglossaceae
|
| BOLUM2 | Botrychium lunaria (L.) Sw. var. minganense (Victorin) Dole | Botrychium minganense | Ophioglossaceae
|
| BOLUO2 | Botrychium lunaria (L.) Sw. var. onondagense (Underwood) House | Botrychium lunaria | Ophioglossaceae
|
| BOLU | Botrychium lunaria (L.) Sw. | common moonwort | Ophioglossaceae
|
| BOLU2 | Botrychium lunarioides (Michx.) Sw. | winter grapefern | Ophioglossaceae
|
| BOMA6 | Botrychium matricariae (Schrank) Spreng. | Botrychium multifidum | Ophioglossaceae
|
| BOMAH | Botrychium matricariifolium (A. Braun ex Dowell) A. Braun ex Koch ssp. hesperium Maxon & Clausen | Botrychium hesperium | Ophioglossaceae
|
| BOMAH2 | Botrychium matricariifolium (A. Braun ex Dowell) A. Braun ex Koch var. hesperium (Maxon & Clausen) Broun | Botrychium hesperium | Ophioglossaceae
|
| BOMA2 | Botrychium matricariifolium (A. Braun ex Dowell) A. Braun ex Koch | matricary grapefern | Ophioglossaceae
|
| BOMI | Botrychium minganense Victorin | Mingan moonwort | Ophioglossaceae
|
| BOMO | Botrychium montanum W.H. Wagner | mountain moonwort | Ophioglossaceae
|
| BOMO2 | Botrychium mormo W.H. Wagner | little goblin moonwort | Ophioglossaceae
|
| BOMUC6 | Botrychium multifidum (Gmel.) Trev. ssp. californicum (Underwood) Clausen | Botrychium multifidum | Ophioglossaceae
|
| BOMUC5 | Botrychium multifidum (Gmel.) Trev. ssp. coulteri (Underwood) Clausen | Botrychium multifidum | Ophioglossaceae
|
| BOMUS | Botrychium multifidum (Gmel.) Trev. ssp. silaifolium (K. Presl) Clausen | Botrychium multifidum | Ophioglossaceae
|
| BOMUC4 | Botrychium multifidum (Gmel.) Trev. var. californicum (Underwood) Broun | Botrychium multifidum | Ophioglossaceae
|
| BOMUC3 | Botrychium multifidum (Gmel.) Trev. var. coulteri (Underwood) Broun | Botrychium multifidum | Ophioglossaceae
|
| BOMUI | Botrychium multifidum (Gmel.) Trev. var. intermedium (D.C. Eat.) Farw. | Botrychium multifidum | Ophioglossaceae
|
| BOMUO | Botrychium multifidum (Gmel.) Trev. var. oneidense (Gilbert) Farw. | Botrychium oneidense | Ophioglossaceae
|
| BOMUR | Botrychium multifidum (Gmel.) Trev. var. robustum (Rupr.) C. Christens. | Botrychium robustum | Ophioglossaceae
|
| BOMUS2 | Botrychium multifidum (Gmel.) Trev. var. silaifolium (K. Presl) Broun | Botrychium multifidum | Ophioglossaceae
|
| BOMU | Botrychium multifidum (Gmel.) Trev. | leathery grapefern | Ophioglossaceae
|
| BOOBE | Botrychium obliquum Muhl. ex Willd. var. elongatum Gilbert & Haberer | Botrychium dissectum | Ophioglossaceae
|
| BOOB | Botrychium obliquum Muhl. ex Willd. | Botrychium dissectum | Ophioglossaceae
|
| BOON | Botrychium oneidense (Gilbert) House | bluntlobe grapefern | Ophioglossaceae
|
| BOON2 | Botrychium onondagense Underwood | Botrychium lunaria | Ophioglossaceae
|
| BOPA12 | Botrychium pallidum W.H. Wagner | pale botrychium | Ophioglossaceae
|
| BOPA9 | Botrychium paradoxum W.H. Wagner | peculiar moonwort | Ophioglossaceae
|
| BOPE4 | Botrychium pedunculosum W.H. Wagner | stalked moonwort | Ophioglossaceae
|
| BOPI | Botrychium pinnatum St. John | northern moonwort | Ophioglossaceae
|
| BOPS | Botrychium pseudopinnatum W.H. Wagner | false daisyleaf moonwort | Ophioglossaceae
|
| BOPU2 | Botrychium pumicola Coville ex Underwood | Crater Lake grapefern | Ophioglossaceae
|
| BORO6 | Botrychium robustum Rupr. | leathery grapefern | Ophioglossaceae
|
| BORU | Botrychium rugulosum W.H. Wagner | ternate grapefern | Ophioglossaceae
|
| BOSIC2 | Botrychium silaifolium K. Presl var. coulteri (Underwood) Jepson | Botrychium multifidum | Ophioglossaceae
|
| BOSI3 | Botrychium silaifolium K. Presl | Botrychium multifidum | Ophioglossaceae
|
| BOSIT2 | Botrychium simplex E. Hitchc. ssp. typicum Clausen | Botrychium simplex | Ophioglossaceae
|
| BOSIC | Botrychium simplex E. Hitchc. var. compositum (Lasch) Milde | Botrychium simplex | Ophioglossaceae
|
| BOSIL | Botrychium simplex E. Hitchc. var. laxifolium (Clausen) Fern. | Botrychium simplex | Ophioglossaceae
|
| BOSIT | Botrychium simplex E. Hitchc. var. tenebrosum (A.A. Eat.) Clausen | Botrychium simplex | Ophioglossaceae
|
| BOSI | Botrychium simplex E. Hitchc. | little grapefern | Ophioglossaceae
|
| BOSP4 | Botrychium spathulatum W.H. Wagner | spathulate botrychium | Ophioglossaceae
|
| BOSU | Botrychium subbifoliatum Brack. | island grapefern | Ophioglossaceae
|
| BOTE10 | Botrychium tenebrosum A.A. Eat. | Botrychium simplex | Ophioglossaceae
|
| BOTE3 | Botrychium ternatum auct. non (Thunb.) Sw. | Botrychium rugulosum | Ophioglossaceae
|
| BOTU3 | Botrychium tunux Stensvold & Farrar | | Ophioglossaceae
|
| BOVIE | Botrychium virginianum (L.) Sw. ssp. europaeum (Angstr.) J�v. | Botrychium virginianum | Ophioglossaceae
|
| BOVIE2 | Botrychium virginianum (L.) Sw. var. europaeum Angstr. | Botrychium virginianum | Ophioglossaceae
|
| BOVI | Botrychium virginianum (L.) Sw. | rattlesnake fern | Ophioglossaceae
|
| BOYA | Botrychium yaaxudakeit Stensvold & Farrar | | Ophioglossaceae
|
| BOTRY | Botrychium Sw. | grapefern | Ophioglossaceae
|
| BOBO3 | Botrydina botryoides (L.) Redhead & Kuyper | Omphalina umbellifera | Tricholomataceae
|
| BOLU3 | Botrydina luteovitellina (Pilat & Nannf.) Redhead & Kuyper | Omphalina alpina | Tricholomataceae
|
| BOVE2 | Botrydina velutina (Quelet) Redhead & Kuyper | Omphalina velutina | Tricholomataceae
|
| BOVI6 | Botrydina viridis (Ach.) Redhead & Kuyper | Omphalina hudsoniana | Tricholomataceae
|
| BOVU2 | Botrydina vulgaris Breb. | Omphalina umbellifera | Tricholomataceae
|
| BOBO2 | Botrydium botrys (L.) Small | Chenopodium botrys | Chenopodiaceae
|
| BOCR4 | Bottaria cruentata Mull. Arg. | Pyrenula cruentata | Pyrenulaceae
|
| BOLI3 | Bouchea linifolia Gray | groovestem bouchea | Verbenaceae
|
| BOPRB | Bouchea prismatica (L.) Kuntze var. brevirostra Grenz. | Bouchea prismatica | Verbenaceae
|
| BOPRL2 | Bouchea prismatica (L.) Kuntze var. longirostra Grenz. | Bouchea prismatica | Verbenaceae
|
| BOPR | Bouchea prismatica (L.) Kuntze | prism bouchea | Verbenaceae
|
| BOSP2 | Bouchea spathulata Torr. | spoonleaf | Verbenaceae
|
| BOUCH | Bouchea Cham. | bouchea | Verbenaceae
|
| BOAN5 | Bouchetia anamola auct. non (Miers) Loes. | Bouchetia erecta | Solanaceae
|
| BOER3 | Bouchetia erecta DC. | paintedtongue | Solanaceae
|
| BOUCH2 | Bouchetia Dunal | bouchetia | Solanaceae
|
| BOGL4 | Bougainvillea glabra Choisy | paperflower | Nyctaginaceae
|
| BOSP6 | Bougainvillea spectabilis Willd. | great bougainvillea | Nyctaginaceae
|
| BOUGA | Bougainvillea Comm. ex Juss. | bougainvillea | Nyctaginaceae
|
| BOCA4 | Bourreria cassinifolia (A. Rich.) Griseb. | smooth strongbark | Boraginaceae
|
| BODO | Bourreria domingensis auct. non (DC.) Griseb. | Bourreria succulenta | Boraginaceae
|
| BOOV | Bourreria ovata Miers | Bourreria succulenta | Boraginaceae
|
| BORA2 | Bourreria radula (Poir.) G. Don | rough strongbark | Boraginaceae
|
| BORE5 | Bourreria revoluta Kunth | Bourreria radula | Boraginaceae
|
| BOSUR | Bourreria succulenta Jacq. var. revoluta (Kunth) O.E. Schulz | Bourreria radula | Boraginaceae
|
| BOSU2 | Bourreria succulenta Jacq. | bodywood | Boraginaceae
|
| BOVI2 | Bourreria virgata (Sw.) G. Don | roble de guayo | Boraginaceae
|
| BOURR | Bourreria P. Br. | strongbark | Boraginaceae
|
| BOGRP | Boussingaultia gracilis Miers var. pseudobaselloides (Hauman) Bailey | Anredera cordifolia | Basellaceae
|
| BOGR4 | Boussingaultia gracilis Miers | Anredera cordifolia | Basellaceae
|
| BOLE4 | Boussingaultia leptostachys Moq. | Anredera vesicaria | Basellaceae
|
| BOAM2 | Bouteloua americana (L.) Scribn. | American grama | Poaceae
|
| BOAR3 | Bouteloua arenosa Vasey | Bouteloua barbata | Poaceae
|
| BOARA | Bouteloua aristidoides (Kunth) Griseb. var. aristidoides | needle grama | Poaceae
|
| BOARA2 | Bouteloua aristidoides (Kunth) Griseb. var. arizonica M.E. Jones | Arizona needle grama | Poaceae
|