| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BUAR3 | Buglossoides arvensis (L.) I.M. Johnston | corn gromwell | Boraginaceae
|
| BUGLO | Buglossoides Moench | buglossoides | Boraginaceae
|
| BUBA2 | Buglossum barrelieri All. | Anchusa barrelieri | Boraginaceae
|
| BUDA3 | Bulbilis dactyloides (Nutt.) Raf. ex Kuntze | Buchloe dactyloides | Poaceae
|
| BUSE3 | Bulbocodium serotinum L. | Lloydia serotina | Liliaceae
|
| BUPA2 | Bulbophyllum pachyrrachis (A. Rich.) Griseb. | rat-tail orchid | Orchidaceae
|
| BULBO2 | Bulbophyllum Thouars | bulbophyllum | Orchidaceae
|
| BUAN4 | Bulbostylis annua Nutt. | Psathyrotes annua | Asteraceae
|
| BUAN | Bulbostylis antillana (Britt.) Fern. | Bulbostylis capillaris ssp. antillana | Cyperaceae
|
| BUBA | Bulbostylis barbata (Rottb.) C.B. Clarke | watergrass | Cyperaceae
|
| BUCA6 | Bulbostylis californica Torr. & Gray | Brickellia californica var. californica | Asteraceae
|
| BUCAA | Bulbostylis capillaris (L.) Kunth ex C.B. Clarke ssp. antillana (Britt.) T. Koyama | densetuft hairsedge | Cyperaceae
|
| BUCAC | Bulbostylis capillaris (L.) Kunth ex C.B. Clarke ssp. capillaris | densetuft hairsedge | Cyperaceae
|
| BUCAC2 | Bulbostylis capillaris (L.) Kunth ex C.B. Clarke var. crebra Fern. | Bulbostylis capillaris ssp. capillaris | Cyperaceae
|
| BUCAI | Bulbostylis capillaris (L.) Kunth ex C.B. Clarke var. isopoda Fern. | Bulbostylis capillaris ssp. capillaris | Cyperaceae
|
| BUCA2 | Bulbostylis capillaris (L.) Kunth ex C.B. Clarke | densetuft hairsedge | Cyperaceae
|
| BUCIC2 | Bulbostylis ciliatifolia (Ell.) Fern. var. ciliatifolia | capillary hairsedge | Cyperaceae
|
| BUCIC | Bulbostylis ciliatifolia (Ell.) Fern. var. coarctata (Ell.) Kral | capillary hairsedge | Cyperaceae
|
| BUCI | Bulbostylis ciliatifolia (Ell.) Fern. | capillary hairsedge | Cyperaceae
|
| BUCO | Bulbostylis coarctata (Ell.) Fern. | Bulbostylis ciliatifolia var. coarctata | Cyperaceae
|
| BUCU | Bulbostylis curassavica (Britt.) Britt. ex K�kenth. | West Indian hairsedge | Cyperaceae
|
| BUFE2 | Bulbostylis fendleri C.B. Clarke | Bulbostylis juncoides | Cyperaceae
|
| BUFU | Bulbostylis funckii (Steud.) C.B. Clarke | Funck's hairsedge | Cyperaceae
|
| BUHI | Bulbostylis hirta (Thunb.) Svens. | rough hairsedge | Cyperaceae
|
| BUJU2 | Bulbostylis junciformis (Kunth) C.B. Clarke | Caribbean hairsedge | Cyperaceae
|
| BUJUA | Bulbostylis juncoides (Vahl) K�kenth. var. ampliceps K�kenth. | Bulbostylis juncoides | Cyperaceae
|
| BUJU | Bulbostylis juncoides (Vahl) K�kenth. | rush hairsedge | Cyperaceae
|
| BUPA5 | Bulbostylis papillosa K�kenth. | Bulbostylis junciformis | Cyperaceae
|
| BUPA | Bulbostylis pauciflora (Liebm.) C.B. Clarke | fewflower hairsedge | Cyperaceae
|
| BUSC2 | Bulbostylis schaffneri (Boeckl.) C.B. Clarke | Schaffner's hairsedge | Cyperaceae
|
| BUST | Bulbostylis stenophylla (Ell.) C.B. Clarke | sandy field hairsedge | Cyperaceae
|
| BUVE | Bulbostylis vestita (Kunth) C.B. Clarke | tufted hairsedge | Cyperaceae
|
| BUWA | Bulbostylis warei (Torr.) C.B. Clarke | Ware's hairsedge | Cyperaceae
|
| BULBO | Bulbostylis Kunth | hairsedge | Cyperaceae
|
| BUCO4 | Bulbothrix confoederata (Culb.) Hale | | Parmeliaceae
|
| BUCO5 | Bulbothrix coronata (Fee) Hale | | Parmeliaceae
|
| BUGO | Bulbothrix goebelii (Zenker) Hale | | Parmeliaceae
|
| BUIS | Bulbothrix isidiza (Nyl.) Hale | | Parmeliaceae
|
| BULA7 | Bulbothrix laevigatula (Nyl.) Hale | | Parmeliaceae
|
| BULBO3 | Bulbothrix Hale | bulbothrix | Parmeliaceae
|
| BUAS2 | Bullatina aspidota (Vainio) Vezda & Poelt | | Gomphillaceae
|
| BULLA | Bullatina Vezda & Poelt | bullatina | Gomphillaceae
|
| BUAQ | Bulliarda aquatica (L.) DC. | Crassula aquatica | Crassulaceae
|
| BUAR5 | Bulnesia arborea (Jacq.) Engler | maracaibo lignumvitae | Zygophyllaceae
|
| BUSA6 | Bulnesia sarmienti Lorentz ex Griseb. | balsamo | Zygophyllaceae
|
| BULNE | Bulnesia C. Gay | lignumvitae | Zygophyllaceae
|
| BUAN2 | Bumelia angustifolia Nutt. | Sideroxylon celastrinum | Sapotaceae
|
| BUAN3 | Bumelia anomala (Sarg.) R.B. Clark | Sideroxylon alachuense | Sapotaceae
|
| BUBE | Bumelia bellonis (Urban) Stearn | Sideroxylon portoricense | Sapotaceae
|
| BUCA5 | Bumelia cassinifolia Small | Sideroxylon lycioides | Sapotaceae
|
| BUCEA | Bumelia celastrina Kunth var. angustifolia (Nutt.) R.W. Long | Sideroxylon celastrinum | Sapotaceae
|
| BUCE | Bumelia celastrina Kunth | Sideroxylon celastrinum | Sapotaceae
|
| BUCU2 | Bumelia cubensis Griseb. | Sideroxylon cubense | Sapotaceae
|
| BUKR | Bumelia krugii Pierre | Sideroxylon obovatum | Sapotaceae
|
| BULA4 | Bumelia lacuum Small | Sideroxylon tenax | Sapotaceae
|
| BULAO | Bumelia lanuginosa (Michx.) Pers. ssp. oblongifolia (Nutt.) Cronq. | Sideroxylon lanuginosum ssp. oblongifolium | Sapotaceae
|
| BULAR3 | Bumelia lanuginosa (Michx.) Pers. ssp. rigida (Gray) Cronq. | Sideroxylon lanuginosum ssp. rigidum | Sapotaceae
|
| BULAA2 | Bumelia lanuginosa (Michx.) Pers. var. albicans Sarg. | Sideroxylon lanuginosum ssp. albicans | Sapotaceae
|
| BULAO2 | Bumelia lanuginosa (Michx.) Pers. var. oblongifolia (Nutt.) R.B. Clark | Sideroxylon lanuginosum ssp. oblongifolium | Sapotaceae
|
| BULAR2 | Bumelia lanuginosa (Michx.) Pers. var. rigida Gray | Sideroxylon lanuginosum ssp. rigidum | Sapotaceae
|
| BULAT | Bumelia lanuginosa (Michx.) Pers. var. texana (Buckl.) Cronq. | Sideroxylon lanuginosum ssp. rigidum | Sapotaceae
|
| BULA | Bumelia lanuginosa (Michx.) Pers. | Sideroxylon lanuginosum ssp. lanuginosum | Sapotaceae
|
| BULYE | Bumelia lycioides (L.) Pers. var. ellipsoidalis R.B. Clark | Sideroxylon lycioides | Sapotaceae
|
| BULYV | Bumelia lycioides (L.) Pers. var. virginiana Fern. | Sideroxylon lycioides | Sapotaceae
|
| BULY | Bumelia lycioides (L.) Pers. | Sideroxylon lycioides | Sapotaceae
|
| BUME | Bumelia megacocca Small | Sideroxylon tenax | Sapotaceae
|
| BUMI2 | Bumelia microcarpa Small | Sideroxylon reclinatum ssp. reclinatum | Sapotaceae
|
| BUMO2 | Bumelia monticola Buckl. | Sideroxylon lanuginosum ssp. rigidum | Sapotaceae
|
| BUOB2 | Bumelia oblongifolia Nutt. | Sideroxylon lanuginosum ssp. oblongifolium | Sapotaceae
|
| BUOBK | Bumelia obovata (Lam.) A. DC. var. krugii (Pierre) Cronq. | Sideroxylon obovatum | Sapotaceae
|
| BUOB | Bumelia obovata (Lam.) A. DC. | Sideroxylon obovatum | Sapotaceae
|
| BUREA | Bumelia reclinata (Michx.) Vent. var. austrofloridensis Whetstone | Sideroxylon reclinatum ssp. austrofloridense | Sapotaceae
|
| BURER | Bumelia reclinata (Michx.) Vent. var. rufotomentosa (Small) Cronq. | Sideroxylon reclinatum ssp. rufotomentosum | Sapotaceae
|
| BURE | Bumelia reclinata (Michx.) Vent. | Sideroxylon reclinatum ssp. reclinatum | Sapotaceae
|
| BURI | Bumelia rigida (Gray) Small | Sideroxylon lanuginosum ssp. rigidum | Sapotaceae
|
| BURU | Bumelia rufa Raf. | Sideroxylon lanuginosum ssp. lanuginosum | Sapotaceae
|
| BURU2 | Bumelia rufotomentosa Small | Sideroxylon reclinatum ssp. rufotomentosum | Sapotaceae
|
| BUSA2 | Bumelia salicifolia (L.) Sw. | Sideroxylon salicifolium | Sapotaceae
|
| BUSM | Bumelia smallii R.B. Clark | Sideroxylon lycioides | Sapotaceae
|
| BUTE | Bumelia tenax (L.) Willd. | Sideroxylon tenax | Sapotaceae
|
| BUTE2 | Bumelia texana Buckl. | Sideroxylon lanuginosum ssp. rigidum | Sapotaceae
|
| BUTH | Bumelia thornei Cronq. | Sideroxylon thornei | Sapotaceae
|
| BUGL2 | Bunchosia glandulifera (Jacq.) Kunth | cafe falso | Malpighiaceae
|
| BUGL | Bunchosia glandulosa (Cav.) DC. | cafe forastero | Malpighiaceae
|
| BUNI | Bunchosia nitida auct. non (Jacq.) DC. | Bunchosia polystachia | Malpighiaceae
|
| BUPO5 | Bunchosia polystachia (Andrews) DC. | woodland coffee | Malpighiaceae
|
| BUNCH | Bunchosia L.C. Rich. ex Kunth | woodland coffee | Malpighiaceae
|
| BUED | Bunias edentula Bigelow | Cakile edentula ssp. edentula var. edentula | Brassicaceae
|
| BUER | Bunias erucago L. | crested wartycabbage | Brassicaceae
|
| BUOR | Bunias orientalis L. | Turkish wartycabbage | Brassicaceae
|
| BUNIA | Bunias L. | wartycabbage | Brassicaceae
|
| BUME3 | Bunodophoron melanocarpum (Sw.) Wedin | | Sphaerophoraceae
|
| BUNOD | Bunodophoron A. Massal. | bunodophoron | Sphaerophoraceae
|
| BUAR2 | Buphthalmum arborescens L. | Borrichia arborescens | Asteraceae
|
| BUSA7 | Buphthalmum salicifolium L. | ox-eye | Asteraceae
|
| BUPHT | Buphthalmum L. | ox eye | Asteraceae
|
| BUAM2 | Bupleurum americanum Coult. & Rose | American thorow wax | Apiaceae
|
| BUFO | Bupleurum fontanesii Guss. ex Caruel | Bupleurum odontites | Apiaceae
|
| BULA3 | Bupleurum lancifolium Hornem. | lanceleaf thorow wax | Apiaceae
|
| BUOD2 | Bupleurum odontites L. | narrowleaf thorow wax | Apiaceae
|
| BUPR2 | Bupleurum protractum Hoffm. & Link | Bupleurum lancifolium | Apiaceae
|