| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BRPSC | Bryum pseudotriquetrum (Hedw.) Gaertn. et. al. var. crassirameum Ren. & Card. | Bryum pseudotriquetrum | Bryaceae
|
| BRPS70 | Bryum pseudotriquetrum (Hedw.) Gaertn. et. al. | common green bryum moss | Bryaceae
|
| BRPU12 | Bryum purpurascens (R. Br.) Bruch & Schimp. in B.S.G. | bryum moss | Bryaceae
|
| BRPY | Bryum pyriferum Crundw. & H. Whiteh. | bryum moss | Bryaceae
|
| BRRA6 | Bryum radiculosum Brid. | bryum moss | Bryaceae
|
| BRRE5 | Bryum reedii Robins. | Reed's bryum moss | Bryaceae
|
| BRRI6 | Bryum riparium Hag. | streamside bryum moss | Bryaceae
|
| BRRO8 | Bryum roellii Philib. | Bryum algovicum var. algovicum | Bryaceae
|
| BRRU6 | Bryum rubens Mitt. | bryum moss | Bryaceae
|
| BRRU7 | Bryum ruderale Crundw. & Nyh. | bryum moss | Bryaceae
|
| BRRU8 | Bryum rutilans Brid. | bryum moss | Bryaceae
|
| BRSA4 | Bryum salinum Hag. ex Limpr. | bryum moss | Bryaceae
|
| BRSA5 | Bryum sandbergii Holz. | Roellia roellii | Bryaceae
|
| BRSA6 | Bryum sawyeri Ren. & Card. | Bryum pseudocapillare | Bryaceae
|
| BRSC7 | Bryum schleicheri Schwaegr. | Schleicher's bryum moss | Bryaceae
|
| BRSP9 | Bryum speciosum (Hook. f. & Wils.) Mitt. | Brachymenium speciosum | Bryaceae
|
| BRSTB | Bryum stenotrichum C. M�ll. var. biddlecomiae (Aust.) Lawt. | Bryum amblyodon | Bryaceae
|
| BRST8 | Bryum stenotrichum C. M�ll. | Bryum amblyodon | Bryaceae
|
| BRST6 | Bryum stirtonii Schimp. | Stirton's bryum moss | Bryaceae
|
| BRSU9 | Bryum subapiculatum Hampe | bryum moss | Bryaceae
|
| BRSU14 | Bryum submuticum Philib. | Bryum caespiticium | Bryaceae
|
| BRSU10 | Bryum subneodamense Kindb. | bryum moss | Bryaceae
|
| BRTE8 | Bryum tenuisetum Limpr. | bryum moss | Bryaceae
|
| BRTE9 | Bryum teres Lindb. | bryum moss | Bryaceae
|
| BRTO3 | Bryum torquescens Bruch | Bryum capillare var. capillare | Bryaceae
|
| BRTO4 | Bryum tortifolium Funck in Brid. | Bryum cyclophyllum | Bryaceae
|
| BRTR8 | Bryum truncorum auct. Amer. | Bryum billarderi | Bryaceae
|
| BRTU2 | Bryum turbinatum (Hedw.) Turn. | bryum moss | Bryaceae
|
| BRUL2 | Bryum uliginosum (Brid.) Bruch & Schimp. in B.S.G. | bryum moss | Bryaceae
|
| BRVI8 | Bryum violaceum Crundw. & Nyh. | bryum moss | Bryaceae
|
| BRWA2 | Bryum warneum (R�hl.) Bland. ex Brid. | bryum moss | Bryaceae
|
| BRWE70 | Bryum weigelii Spreng. in Biehler | Weigel's bryum moss | Bryaceae
|
| BRWR70 | Bryum wrightii Sull. & Lesq. | Wright's bryum moss | Bryaceae
|
| BRYUM2 | Bryum Hedw. | bryum moss | Bryaceae
|
| BURO2 | Bucegia romanica Radian | | Marchantiaceae
|
| BUCEG | Bucegia Radian | | Marchantiaceae
|
| BURA2 | Bucephalon racemosum L. | Trophis racemosa | Moraceae
|
| BULA8 | Buchanania latifolia Roxb. | chirauli nut | Anacardiaceae
|
| BUCHA | Buchanania Sprengel | buchanania | Anacardiaceae
|
| BUCA | Buchenavia capitata (Vahl) Eichl. | Buchenavia tetraphylla | Combretaceae
|
| BUTE4 | Buchenavia tetraphylla (Aubl.) Howard | fourleaf buchenavia | Combretaceae
|
| BUCHE | Buchenavia Eichl. | buchenavia | Combretaceae
|
| BUDA | Buchloe dactyloides (Nutt.) Engelm. | buffalograss | Poaceae
|
| BUCHL | Buchloe Engelm. | buffalograss | Poaceae
|
| BUAM | Buchnera americana L. | American bluehearts | Scrophulariaceae
|
| BUAR | Buchnera arizonica (Gray) Pennell | Arizona bluehearts | Scrophulariaceae
|
| BUBR | Buchnera breviflora Pennell | Buchnera americana | Scrophulariaceae
|
| BUEL | Buchnera elongata Sw. | Buchnera longifolia | Scrophulariaceae
|
| BUFL | Buchnera floridana Gandog. | Buchnera americana | Scrophulariaceae
|
| BULO | Buchnera longifolia Kunth | elongated bluehearts | Scrophulariaceae
|
| BUPU | Buchnera pusilla Kunth | pygmy bluehearts | Scrophulariaceae
|
| BUCHN | Buchnera L. | bluehearts | Scrophulariaceae
|
| BUBU | Bucida buceras L. | gregorywood | Combretaceae
|
| BUCA4 | Bucida capitata Vahl | Buchenavia tetraphylla | Combretaceae
|
| BUMO | Bucida molinetii (G. Maza) Alain | spiny bucida | Combretaceae
|
| BUSP | Bucida spinosa Jennings | Bucida molinetii | Combretaceae
|
| BUCID | Bucida L. | bucida | Combretaceae
|
| BUDI | Buckleya distichophylla (Nutt.) Torr. | piratebush | Santalaceae
|
| BUCKL | Buckleya Torr. | buckleya | Santalaceae
|
| BUAL | Buddleja alternifolia Maxim. | fountain butterflybush | Buddlejaceae
|
| BUAS | Buddleja asiatica Lour. | dogtail | Buddlejaceae
|
| BUDA2 | Buddleja davidii Franch. | orange eye butterflybush | Buddlejaceae
|
| BULI | Buddleja lindleyana Fortune ex Lindl. | Lindley's butterflybush | Buddlejaceae
|
| BUMA80 | Buddleja madagascariensis Lam. | smokebush | Buddlejaceae
|
| BUMA | Buddleja marrubiifolia Benth. | woolly butterflybush | Buddlejaceae
|
| BUOF | Buddleja officinalis Maxim. | pole butterflybush | Buddlejaceae
|
| BURAI2 | Buddleja racemosa Torr. ssp. incana (Torr.) Norm. | wand butterflybush | Buddlejaceae
|
| BURAR | Buddleja racemosa Torr. ssp. racemosa | wand butterflybush | Buddlejaceae
|
| BURAI | Buddleja racemosa Torr. var. incana Torr. | Buddleja racemosa ssp. incana | Buddlejaceae
|
| BURA | Buddleja racemosa Torr. | wand butterflybush | Buddlejaceae
|
| BUSA | Buddleja saligna Willd. | squarestem butterflybush | Buddlejaceae
|
| BUSC | Buddleja scordioides Kunth | escobilla butterflybush | Buddlejaceae
|
| BUSE | Buddleja sessiliflora Kunth | Rio Grande butterflybush | Buddlejaceae
|
| BUUT | Buddleja utahensis Coville | Utah butterflybush | Buddlejaceae
|
| BUDDL2 | Buddleja L. | butterflybush | Buddlejaceae
|
| BUAD | Buellia adjuncta Th. Fr. | disc lichen | Physciaceae
|
| BUAE | Buellia aethalia (Ach.) Th. Fr. | disc lichen | Physciaceae
|
| BUAE2 | Buellia aethalioides (Nyl.) H. Olivier | Buellia aethalia | Physciaceae
|
| BUAL2 | Buellia alboatra (Hoffm.) Th. Fr. | Diplotomma alboatrum | Physciaceae
|
| BUAM4 | Buellia ambigua (Ach.) Malme | Diplotomma ambiguum | Physciaceae
|
| BUAM3 | Buellia amphidexia Imshaug ex R. C. Harris | disc lichen | Physciaceae
|
| BUAR4 | Buellia arnoldii Servit & Nadv. | Arnold's disc lichen | Physciaceae
|
| BUAT | Buellia atrata (Sm.) Anzi | Orphniospora moriopsis | Fuscideaceae
|
| BUBA3 | Buellia badia (Fr.) A. Massal. | disc lichen | Physciaceae
|
| BUBA5 | Buellia badioatra (Florke ex Sprengel) Korber | Rhizocarpon badioatrum | Rhizocarpaceae
|
| BUBA4 | Buellia bahiana Malme | Hafellia bahiana | Physciaceae
|
| BUBL2 | Buellia blasteniospora Zahlbr. | Hafellia parastata | Physciaceae
|
| BUBL | Buellia blumeri Zahlbr. | Buellia retrovertens | Physciaceae
|
| BUBO | Buellia bolacina Tuck. | disc lichen | Physciaceae
|
| BUCA7 | Buellia calcariaecola de Lesd. | disc lichen | Physciaceae
|
| BUCA11 | Buellia callispora (C. Knight) J. Steiner | Hafellia callispora | Physciaceae
|
| BUCA8 | Buellia caloosensis Tuck. | disc lichen | Physciaceae
|
| BUCA12 | Buellia canescens (Dickson) De Not. | Diploicia canescens | Physciaceae
|
| BUCA9 | Buellia capitis-regnum W. A. Weber | disc lichen | Physciaceae
|
| BUCA10 | Buellia catasema (Tuck.) Tuck. | disc lichen | Physciaceae
|
| BUCH2 | Buellia chlorophaea (Hepp ex Leighton) Lettau | Diplotomma chlorophaeum | Physciaceae
|
| BUCO2 | Buellia coccinea (Fee) Aptroot | disc lichen | Physciaceae
|
| BUCO6 | Buellia colludens (Nyl.) Arnold | Rhizocarpon hochstetteri | Rhizocarpaceae
|
| BUCO3 | Buellia coniops (Wahlenb.) Th. Fr. | Amandinea coniops | Physciaceae
|
| BUCO7 | Buellia conspirans (Nyl.) Vainio | Buellia curatellae | Physciaceae
|
| BUCO8 | Buellia contermina Arnold | Buellia uberior | Physciaceae
|