| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BUSU | Bupleurum subovatum Link ex Spreng. | Bupleurum lancifolium | Apiaceae
|
| BUTRA2 | Bupleurum triradiatum J.E. Adams ex Hoffmann ssp. arcticum (Regel) Hult�n | Bupleurum americanum | Apiaceae
|
| BUPLE | Bupleurum L. | bupleurum | Apiaceae
|
| BUBI | Burmannia biflora L. | northern bluethread | Burmanniaceae
|
| BUCA3 | Burmannia capitata (J.F. Gmel.) Mart. | southern bluethread | Burmanniaceae
|
| BUFL2 | Burmannia flava Mart. | Fahkahatchee bluethread | Burmanniaceae
|
| BULE5 | Burmannia ledermannii Jonk. | bluethread | Burmanniaceae
|
| BURMA | Burmannia L. | bluethread | Burmanniaceae
|
| BUBUB | Bursa bursa-pastoris (L.) Britt. var. bifida Cr�pin | Capsella bursa-pastoris | Brassicaceae
|
| BUBU3 | Bursa bursa-pastoris (L.) Britt. | Capsella bursa-pastoris | Brassicaceae
|
| BUGR | Bursa gracilis Gren. | Capsella bursa-pastoris | Brassicaceae
|
| BUFAE | Bursera fagaroides (Kunth) Engl. var. elongata McVaugh & Rzed. | fragrant bursera | Burseraceae
|
| BUFA | Bursera fagaroides (Kunth) Engl. | fragrant bursera | Burseraceae
|
| BUMI | Bursera microphylla Gray | elephant tree | Burseraceae
|
| BUOD3 | Bursera odorata auct. non Brandeg. | Bursera fagaroides var. elongata | Burseraceae
|
| BUSI | Bursera simaruba (L.) Sarg. | gumbo limbo | Burseraceae
|
| BURSE | Bursera Jacq. ex L. | bursera | Burseraceae
|
| BUHU | Burshia humilis Raf. | Myriophyllum humile | Haloragaceae
|
| BUMO5 | Butea monosperma (Lam.) Taubert | Bengal kino | Fabaceae
|
| BUTEA | Butea Roxb. ex Willd. | butea | Fabaceae
|
| BUUM | Butomus umbellatus L. | flowering rush | Butomaceae
|
| BUTOM | Butomus L. | butomus | Butomaceae
|
| BUHI2 | Buttonia hildebrandtii Engl. | | Scrophulariaceae
|
| BUTTO | Buttonia MacKen ex Benth. | buttonia | Scrophulariaceae
|
| BUPAP | Butyrospermum paradoxum (Gaertner f.) Hepper ssp. parkii (G. Don) Hepper | Vitellaria paradoxa | Sapotaceae
|
| BUPA7 | Butyrospermum parkii (G. Don) Kotschy | Vitellaria paradoxa | Sapotaceae
|
| BUAP70 | Buxbaumia aphylla Hedw. | buxbaumia moss | Buxbaumiaceae
|
| BUIN3 | Buxbaumia indusiata Brid. | Buxbaumia viridis | Buxbaumiaceae
|
| BUMI6 | Buxbaumia minakatae Okam. | buxbaumia moss | Buxbaumiaceae
|
| BUPI | Buxbaumia piperi Best | Piper's buxbaumia moss | Buxbaumiaceae
|
| BUSU2 | Buxbaumia subcylindrica Grout | Buxbaumia minakatae | Buxbaumiaceae
|
| BUVI2 | Buxbaumia viridis (DC.) Moug. & Nestl. | buxbaumia moss | Buxbaumiaceae
|
| BUXBA2 | Buxbaumia Hedw. | buxbaumia moss | Buxbaumiaceae
|
| BUBR2 | Buxella brachycera (Michx.) Small | Gaylussacia brachycera | Ericaceae
|
| BUBA6 | Buxus balearica Lam. | | Buxaceae
|
| BUCH | Buxus chinensis Link | Simmondsia chinensis | Simmondsiaceae
|
| BUMI5 | Buxus microphylla Siebold & Zucc. | littleleaf boxwood | Buxaceae
|
| BUPO | Buxus portoricensis Alain | Puerto Rico box | Buxaceae
|
| BUSE2 | Buxus sempervirens L. | common box | Buxaceae
|
| BUVA | Buxus vahlii Baill. | Vahl's box | Buxaceae
|
| BUXUS | Buxus L. | boxwood | Buxaceae
|
| BYCO3 | Byrsonima coccolobifolia Kunth | locustberry | Malpighiaceae
|
| BYCO2 | Byrsonima coriacea (Sw.) DC. | Byrsonima spicata | Malpighiaceae
|
| BYCR | Byrsonima crassifolia (L.) Kunth | maricao cimun | Malpighiaceae
|
| BYCU | Byrsonima cuneata (Turcz.) P. Wilson | Byrsonima lucida | Malpighiaceae
|
| BYHO | Byrsonima horneana Britt. & Small | Byrsonima spicata | Malpighiaceae
|
| BYLU | Byrsonima lucida (P. Mill.) DC. | Long Key locustberry | Malpighiaceae
|
| BYOP | Byrsonima ophiticola Small ex Britt. | Byrsonima spicata | Malpighiaceae
|
| BYSP | Byrsonima spicata (Cav.) Kunth | doncella | Malpighiaceae
|
| BYWA | Byrsonima wadsworthii Little | almendrillo | Malpighiaceae
|
| BYRSO | Byrsonima L.C. Rich. ex Kunth | byrsonima | Malpighiaceae
|
| BYLE | Byssoloma leucoblepharum (Nyl.) Vainio | | Pilocarpaceae
|
| BYMA | Byssoloma marginatum (Arnold) Serus. | | Pilocarpaceae
|
| BYME | Byssoloma meadii (Tuck.) S. Ekman | | Pilocarpaceae
|
| BYPU | Byssoloma pubescens Vezda ex R.C. Harris | | Pilocarpaceae
|
| BYRO | Byssoloma rotulifomre (Mull. Arg.) R. Sant. | Byssoloma subdiscordans | Pilocarpaceae
|
| BYSU | Byssoloma subdiscordans (Nyl.) P. James | | Pilocarpaceae
|
| BYTR | Byssoloma tricholomum (Mont.) Zahlbr. | | Pilocarpaceae
|
| BYSSO | Byssoloma Trevisan | byssoloma | Pilocarpaceae
|
| CACAC4 | Cabomba caroliniana Gray var. caroliniana | Carolina fanwort | Cabombaceae
|
| CACAP | Cabomba caroliniana Gray var. pulcherrima Harper | Carolina fanwort | Cabombaceae
|
| CACA | Cabomba caroliniana Gray | Carolina fanwort | Cabombaceae
|
| CAFU13 | Cabomba furcata J.A. & J.H. Schultes | forked fanwort | Cabombaceae
|
| CAHA26 | Cabomba haynesii Wiersema | fishgrass | Cabombaceae
|
| CAPI22 | Cabomba piauhyensis Gardner ex Hook. | Cabomba furcata | Cabombaceae
|
| CAPI8 | Cabomba piauhyensis auct. non Gardner ex Hook. | Cabomba haynesii | Cabombaceae
|
| CAPU22 | Cabomba pulcherrima (Harper) Fassett | Cabomba caroliniana var. pulcherrima | Cabombaceae
|
| CABOM | Cabomba Aubl. | fanwort | Cabombaceae
|
| CAAT | Cacalia atriplicifolia L. | Arnoglossum atriplicifolium | Asteraceae
|
| CAAUK | Cacalia auriculata DC. ssp. kamtschatica (Maxim.) Hult�n | Parasenecio auriculata | Asteraceae
|
| CAAU9 | Cacalia auriculata DC. | Parasenecio auriculata | Asteraceae
|
| CACO50 | Cacalia coccinea Sims | Emilia coccinea | Asteraceae
|
| CACO59 | Cacalia cordifolia L. f. | Mikania cordifolia | Asteraceae
|
| CADE | Cacalia decomposita Gray | Psacalium decompositum | Asteraceae
|
| CADI26 | Cacalia diversifolia Torr. & Gray | Arnoglossum diversifolium | Asteraceae
|
| CAEL14 | Cacalia elliottii (Harper) Shinners | Arnoglossum ovatum | Asteraceae
|
| CAFL12 | Cacalia floridana Gray | Arnoglossum floridanum | Asteraceae
|
| CAKA9 | Cacalia kamtschatica (Maxim.) Kudo | Parasenecio auriculata | Asteraceae
|
| CALAE | Cacalia lanceolata Nutt. var. elliottii (Harper) Kral & R.K. Godfrey | Arnoglossum ovatum | Asteraceae
|
| CALAV2 | Cacalia lanceolata Nutt. var. virescens (Harper) Shinners | Arnoglossum ovatum | Asteraceae
|
| CALA56 | Cacalia lanceolata Nutt. | Arnoglossum ovatum | Asteraceae
|
| CAMU23 | Cacalia muehlenbergii (Schultz-Bip.) Fern. | Arnoglossum muehlenbergii | Asteraceae
|
| CANAG | Cacalia nardosmia Gray var. glabrata (Piper) Boivin | Cacaliopsis nardosmia | Asteraceae
|
| CANA7 | Cacalia nardosmia Gray | Cacaliopsis nardosmia | Asteraceae
|
| CAOV6 | Cacalia ovata Walt. | Arnoglossum ovatum | Asteraceae
|
| CAPA54 | Cacalia paniculata Raf. | Arnoglossum plantagineum | Asteraceae
|
| CAPL | Cacalia plantaginea (Raf.) Shinners | Arnoglossum plantagineum | Asteraceae
|
| CAPO14 | Cacalia porophyllum L. | Porophyllum ruderale ssp. ruderale | Asteraceae
|
| CAPT2 | Cacalia pteranthes Raf. | Arnoglossum plantagineum | Asteraceae
|
| CARE12 | Cacalia reniformis Muhl. ex Willd., non Lam. | Arnoglossum muehlenbergii | Asteraceae
|
| CARO21 | Cacalia rotundifolia (Raf.) House | Arnoglossum atriplicifolium | Asteraceae
|
| CARU16 | Cacalia rugelia (Gray) Barkl. & Cronq. | Rugelia nudicaulis | Asteraceae
|
| CASO4 | Cacalia sonchifolia L. | Emilia sonchifolia var. sonchifolia | Asteraceae
|
| CASU | Cacalia suaveolens L. | Hasteola suaveolens | Asteraceae
|
| CASU30 | Cacalia sulcata Fern. | Arnoglossum sulcatum | Asteraceae
|
| CATU10 | Cacalia tuberosa Nutt. | Arnoglossum plantagineum | Asteraceae
|
| CANAG2 | Cacaliopsis nardosmia (Gray) Gray var. glabrata Piper | Cacaliopsis nardosmia | Asteraceae
|
| CANA5 | Cacaliopsis nardosmia (Gray) Gray | silvercrown | Asteraceae
|
| CACAL4 | Cacaliopsis Gray | cacaliopsis | Asteraceae
|
| CABI17 | Cacao bicolor (Humb. & Bonpl.) Poiret | Theobroma bicolor | Sterculiaceae
|
| CAER4 | Cacara erosa (L.) Kuntze | Pachyrhizus erosus | Fabaceae
|