| Hans T. Beck |
Spermatophytes; Sapindaceae; Paullinia; floristics of northwestern Ecuador, southern Africa, and upper midwestern U.S.; economic botany; ethnobotany |
| Romeu P. Belém |
Spermatophytes |
| Bradley C. Bennett |
Spermatophytes; Ethnobotany |
| Alwin Berger |
Spermatophytes; Agave |
| George N. Best |
Bryophytes; Spermatophytes |
| Eugene P. Bicknell |
Spermatophytes; Characeae; Bryophytes |
| Jacques S. Blanchet |
Spermatophytes |
| Henry N. Bolander |
Algae; Bryophytes; Cryptogams; Musci; Orchidaceae; Phanerogams; Spermatophytes |
| Brian M. Boom |
Spermatophytes; Theaceae; Rubiaceae; Bryophytes; Lichens |
| Nathaniel Lord Britton |
Algae; Bryophytes; Lichens; Mycology; Phanerogams; Pteridophytes; Spermatophytes |
| Elizabeth G. Britton |
Algae; Bryophytes; Pteridophytes; Spermatophytes; Lichens |
| William Russel Buck |
Algae; Bryophytes; Fungi; Lichens; Pteridophytes; Spermatophytes |
| William J. Burchell |
Bryophytes; Pteridophytes; Spermatophytes; Orchidaceae |
| Edward S. Burgess |
Pteridophytes; Spermatophytes; Aster |
| Wendell H. Camp |
Spermatophytes; Lichens |
| William M. Canby |
Spermatophytes; Cryptogams; Bryophytes |
| Andre Mauricio Viera de Carvalho |
Spermatophytes; Fabaceae; Dalbergia; Bryophytes |
| Alvan Wentworth Chapman |
Algae; Angiosperms; Bryophytes; Pteridophytes; Spermatophytes |
| John Henry Christ IV |
Spermatophytes |
| Cárlos A. Cid Ferreira |
Spermatophytes; Bryophytes |
| Mary Strong Clemens |
Spermatophytes; Mycology; Bryophytes; Lichens |
| Frederick E. Clements |
Algae; Mycology; Spermatophytes; Bryophytes |
| Henry S. Conard |
Bryophytes; Spermatophytes |
| John M. Coulter |
Mycology; Spermatophytes |
| Richard S. Cowan |
Spermatophytes; Bryophytes |