| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BRPU4 | Bromus purgans L. | Bromus kalmii | Poaceae
|
| BRPU10 | Bromus purgans auct. non L. | Bromus latiglumis | Poaceae
|
| BRPU10 | Bromus purgans auct. non L. | Bromus pubescens | Poaceae
|
| BRRA2 | Bromus racemosus L. | bald brome | Poaceae
|
| BRRA3 | Bromus ramosus Huds. | hairy brome | Poaceae
|
| BRRIP | Bromus richardsonii Link var. pallidus (Hook.) Shear | Bromus ciliatus var. ciliatus | Poaceae
|
| BRRI2 | Bromus richardsonii Link | Bromus ciliatus var. richardsonii | Poaceae
|
| BRRIG | Bromus rigidus Roth var. gussonei (Parl.) Coss. & Durieu | Bromus diandrus | Poaceae
|
| BRRI8 | Bromus rigidus Roth | ripgut brome | Poaceae
|
| BRRU2 | Bromus rubens L. | red brome | Poaceae
|
| BRSC3 | Bromus scoparius L. | broom brome | Poaceae
|
| BRSEG | Bromus secalinus L. ssp. grossus (Desf. ex DC.) Domin | Bromus grossus | Poaceae
|
| BRSEG2 | Bromus secalinus L. var. grossus (Desf. ex DC.) Neilr. | Bromus grossus | Poaceae
|
| BRSEH | Bromus secalinus L. var. hirsutus Kindb. | Bromus secalinus | Poaceae
|
| BRSEH2 | Bromus secalinus L. var. hirtus (F.W. Schultz) Hegi | Bromus secalinus | Poaceae
|
| BRSEV | Bromus secalinus L. var. velutinus (Schrad.) Koch | Bromus grossus | Poaceae
|
| BRSE | Bromus secalinus L. | rye brome | Poaceae
|
| BRSE4 | Bromus secundus J. Presl | Festuca rubra ssp. secunda | Poaceae
|
| BRSIA | Bromus sitchensis Trin. var. aleutensis (Trin. ex Griseb.) Hult�n | Bromus aleutensis | Poaceae
|
| BRSIM | Bromus sitchensis Trin. var. marginatus (Nees ex Steud.) Boivin | Bromus marginatus | Poaceae
|
| BRSI | Bromus sitchensis Trin. | Alaska brome | Poaceae
|
| BRSP4 | Bromus spicatus Nees | Tripogon spicatus | Poaceae
|
| BRSQ2 | Bromus squarrosus L. | corn brome | Poaceae
|
| BRST3 | Bromus stamineus Desv. | roadside brome | Poaceae
|
| BRST2 | Bromus sterilis L. | poverty brome | Poaceae
|
| BRSU4 | Bromus subvelutinus Shear | Bromus luzonensis | Poaceae
|
| BRSU2 | Bromus suksdorfii Vasey | Suksdorf's brome | Poaceae
|
| BRTEG | Bromus tectorum L. var. glabratus Spenner | Bromus tectorum | Poaceae
|
| BRTEH | Bromus tectorum L. var. hirsutus Regel | Bromus tectorum | Poaceae
|
| BRTEN | Bromus tectorum L. var. nudus Klett & Richter | Bromus tectorum | Poaceae
|
| BRTE | Bromus tectorum L. | cheatgrass | Poaceae
|
| BRTE2 | Bromus texensis (Shear) A.S. Hitchc. | Texas brome | Poaceae
|
| BRTH2 | Bromus thominei Hardham ex Nyman | Bromus hordeaceus ssp. thominei | Poaceae
|
| BRTRE | Bromus trinii Desv. var. excelsus Shear | Bromus berterianus | Poaceae
|
| BRTR2 | Bromus trinii Desv. | Bromus berterianus | Poaceae
|
| BRUN | Bromus unioloides Kunth | Bromus catharticus | Poaceae
|
| BRVI9 | Bromus villosus Forsk., non Scop. | Bromus rigidus | Poaceae
|
| BRVUE | Bromus vulgaris (Hook.) Shear var. eximius Shear | Bromus vulgaris | Poaceae
|
| BRVUR | Bromus vulgaris (Hook.) Shear var. robustus Shear | Bromus vulgaris | Poaceae
|
| BRVU | Bromus vulgaris (Hook.) Shear | Columbia brome | Poaceae
|
| BRWI | Bromus willdenowii Kunth | Bromus catharticus | Poaceae
|
| BROMU | Bromus L. | brome | Poaceae
|
| BRMI4 | Brongniartia minutifolia S. Wats. | littleleaf greentwig | Fabaceae
|
| BRONG | Brongniartia Kunth | greentwig | Fabaceae
|
| BRALA2 | Brosimum alicastrum Sw. ssp. alicastrum | ramon | Moraceae
|
| BRALB | Brosimum alicastrum Sw. ssp. bolivarense (Pitt.) C. C. Berg | Bolivar brosimum | Moraceae
|
| BRAL3 | Brosimum alicastrum Sw. | breadnut | Moraceae
|
| BRAU2 | Brosimum aubletii Poeppig & Endl. | Brosimum guianense | Moraceae
|
| BRGU2 | Brosimum guianense (Aublet) Huber | Guiana brosimum | Moraceae
|
| BRSP | Brosimum spurium Sw. | Pseudolmedia spuria | Moraceae
|
| BRUL | Brosimum uleanum Mildbr. | Brosimum alicastrum ssp. bolivarense | Moraceae
|
| BRUT | Brosimum utile (Kunth) Pittier | cow tree | Moraceae
|
| BROSI | Brosimum Sw. | brosimum | Moraceae
|
| BRLE10 | Brothera leana (Sull.) C. M�ll. | brothera moss | Dicranaceae
|
| BROTH | Brothera C. M�ll. | brothera moss | Dicranaceae
|
| BRDE10 | Brotherella delicatula (James) Fleisch. | Brotherella recurvans | Sematophyllaceae
|
| BRRE3 | Brotherella recurvans (Michx.) Fleisch. | recurved brotherella moss | Sematophyllaceae
|
| BRRO6 | Brotherella roellii (Ren. & Card. in R�ll) Fleisch. | Roell's brotherella moss | Sematophyllaceae
|
| BRTE10 | Brotherella tenuirostris (Bruch & Schimp. in Sull.) Broth. | Pylaisiadelpha tenuirostris | Hypnaceae
|
| BROTH2 | Brotherella Loeske ex Fleisch. | brotherella moss | Sematophyllaceae
|
| BRDO3 | Broughtonia domingensis (Lindl.) Rolfe | king orchid | Orchidaceae
|
| BROUG | Broughtonia R. Brown | broughtonia | Orchidaceae
|
| BRARP | Broussaisia arguta Gaud. var. pellucida (Gaud.) Fosberg | Broussaisia arguta | Hydrangeaceae
|
| BRAR6 | Broussaisia arguta Gaud. | kanawao | Hydrangeaceae
|
| BROUS2 | Broussaisia Gaud. | broussaisia | Hydrangeaceae
|
| BRPA4 | Broussonetia papyrifera (L.) L'H�r. ex Vent. | paper mulberry | Moraceae
|
| BROUS | Broussonetia L'H�r. ex Vent. | broussonetia | Moraceae
|
| BRAM | Browallia americana L. | Jamaican forget-me-not | Solanaceae
|
| BREL5 | Browallia eludens R.K. Van Devender & P.D. Jenkins | bush-violet | Solanaceae
|
| BRTE6 | Browallia texana Torr. | Hunzikeria texana | Solanaceae
|
| BRVI4 | Browallia viscosa auct. non Kunth | Browallia americana | Solanaceae
|
| BROWA | Browallia L. | browallia | Solanaceae
|
| BRBO2 | Bruchia bolanderi Lesq. | Bolander's bruchia moss | Bruchiaceae
|
| BRBR8 | Bruchia brevifolia Sull. | shortleaf bruchia moss | Bruchiaceae
|
| BRCA19 | Bruchia carolinae Aust. | Carolina bruchia moss | Bruchiaceae
|
| BRDO2 | Bruchia donnellii Aust. | Bruchia flexuosa | Bruchiaceae
|
| BRDR2 | Bruchia drummondii Hampe ex Britt. | Drummond's bruchia moss | Bruchiaceae
|
| BRFL3 | Bruchia flexuosa (Sw. ex Schwaegr.) C. M�ll. | bruchia moss | Bruchiaceae
|
| BRFU4 | Bruchia fusca Britt. | bruchia moss | Bruchiaceae
|
| BRHA2 | Bruchia hallii Aust. | Hall's bruchia moss | Bruchiaceae
|
| BRLO5 | Bruchia longicollis D. C. Eat. | Bruchia vogesiaca | Bruchiaceae
|
| BRRA5 | Bruchia ravenelii Wils in Sull. | Ravenel's bruchia moss | Bruchiaceae
|
| BRSU13 | Bruchia sullivantii Aust. | Bruchia flexuosa | Bruchiaceae
|
| BRTE7 | Bruchia texana Aust. | Texas bruchia moss | Bruchiaceae
|
| BRVO2 | Bruchia vogesiaca Nestl. ex Schwaegr. | bruchia moss | Bruchiaceae
|
| BRUCH | Bruchia Schwaegr. | bruchia moss | Bruchiaceae
|
| BRAR14 | Brugmansia arborea auct. non (L.) Steud. | Brugmansia candida | Solanaceae
|
| BRCA12 | Brugmansia candida Pers. | angel's-trumpet | Solanaceae
|
| BRSA3 | Brugmansia sanguinea (Ruiz & Pavon) D. Don | red floripontio | Solanaceae
|
| BRSU3 | Brugmansia suaveolens (Humb. & Bonpl. ex Willd.) Bercht. & K. Presl | angel's-tears | Solanaceae
|
| BRUGM | Brugmansia Pers. | brugmansia | Solanaceae
|
| BRGY | Bruguiera gymnorrhiza (L.) Lam. | oriental mangrove | Rhizophoraceae
|
| BRPA15 | Bruguiera parviflora (Roxb.) Wight & Arn. ex Griffith | smallflower bruguiera | Rhizophoraceae
|
| BRUGU | Bruguiera Lam. | bruguiera | Rhizophoraceae
|
| BRCOD | Brunellia comocladiifolia Humb. & Bonpl. ssp. domingensis Cuatrec. | West Indian sumac | Brunelliaceae
|
| BRCO6 | Brunellia comocladiifolia Humb. & Bonpl. | West Indian sumac | Brunelliaceae
|
| BRUNE | Brunellia Ruiz & Pav�n | brunellia | Brunelliaceae
|
| BRAM4 | Brunfelsia americana L. | American brunfelsia | Solanaceae
|
| BRCH3 | Brunfelsia chiricaspi Plowman | brunfelsia | Solanaceae
|
| BRDE4 | Brunfelsia densifolia Krug & Urban | Serpentine Hill raintree | Solanaceae
|
| BRGR9 | Brunfelsia grandiflora D. Don | largeflower brunfelsia | Solanaceae
|