| 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 |
| Isa (Irmgard) Degener |
Algae; Plants of Hawaii; Bryophytes; Spermatophytes |
| Otto Degener |
Pteridophytes; Spermatophytes; Flora of Hawaii; Bryophytes; Lichens |
| Piero Giuseppe Delprete |
Spermatophytes; Rubiaceae |
| Herbert M. Denslow |
Spermatophytes; Bryophytes |
| Jonathan Paul Dey |
Lichens |
| Aris B. Donaldson |
Spermatophytes; Custer's Expedition to the Black Hills |
| William R. Dudley |
Mycology; Spermatophytes; Bryophytes |
| Kent Parsons Dumont |
Mycology; Lichens |
| Per K. H. Dusén |
Spermatophytes; Bryophytes; Fossils; Pteridophytes; Lichens |
| Père Antoine Duss |
Mycology; Bryophytes; Spermatophytes |
| Franklin S. Earle |
Algae; Bryophytes; Mycology; Spermatophytes; Lichens |
| George Eiten |
Spermatophytes; Oxalis; Brazilian flora; Bryophytes; Lichens |
| Erik L. Ekman |
Pteridophytes; Spermatophytes; Fungi |
| Job B. Ellis |
Mycology; Lichens |
| Adolph D. E. Elmer |
All groups; Pteridophytes; Spermatophytes; Bryophytes; Mycology |
| Charles E. Fairman |
Mycology |
| Raymond M. Fatto |
Mycology |
| Bruce Fink |
Algae; Bryophytes; Lichens; Mycology; Spermatophytes |
| Seville Flowers |
Bryophytes; Pteridophytes; Algae; Spermatophytes; Mycology |
| Ana E. Franco-Molano |
Agaricales; Mycology |
| Merton A. Franklin |
Spermatophytes |
| John C. Frémont |
Spermatophytes |
| Theodore C. Frye |
Algae; Pteridophytes; Spermatophytes; Bryophytes; Phanerogams |
| Paul A. Fryxell |
Spermatophytes; Malvaceae; Gossypium |
| Wilson Ganev |
Spermatophytes |