| Edward S. Burgess |
Pteridophytes; Spermatophytes; Aster |
| Gertrude S. Burlingham |
Mycology; Russulales |
| Edward A. Burt |
Mycology |
| Roy F. Cain |
Bryophytes; Fungi; Cryptogams |
| William Wirt Calkins |
Mycology; Lichens; Bryophytes |
| Wendell H. Camp |
Spermatophytes; Lichens |
| William M. Canby |
Spermatophytes; Cryptogams; Bryophytes |
| Andre Mauricio Viera de Carvalho |
Spermatophytes; Fabaceae; Dalbergia; Bryophytes |
| George W. Carver |
Mycology |
| Alvan Wentworth Chapman |
Algae; Angiosperms; Bryophytes; Pteridophytes; Spermatophytes |
| John Henry Christ IV |
Spermatophytes |
| Steven P. Churchill |
Bryophytes |
| Cárlos A. Cid Ferreira |
Spermatophytes; Bryophytes |
| Mary Strong Clemens |
Algae; Bryophytes; Lichens; Mycology; Spermatophytes |
| Frederick E. Clements |
Algae; Mycology; Spermatophytes; Bryophytes |
| Frank S. Collins |
Algae |
| Henry S. Conard |
Bryophytes; Spermatophytes |
| John M. Coulter |
Mycology; Spermatophytes |
| Richard S. Cowan |
Spermatophytes; Bryophytes |
| Thomas B. Croat |
Spermatophytes; Araceae; Lichens; Bryophytes |
| Arthur J. Cronquist |
Asteraceae; Spermatophytes |
| Howard A. Crum |
Bryophytes; Lichens |
| Clara E. Cummings |
Mycology; Lichens; Musci; Spermatophytes |
| Douglas Charles Daly |
Spermatophytes; Burseraceae; Loganiaceae; Bryophytes |
| Naveed Davoodian |
Mycology |