| George Gardner |
Algae; Bryophytes; Pteridophytes; Spermatophytes |
| Albert O. Garrett |
Algae; Mycology; Spermatophytes |
| Alwyn H. Gentry |
Bignoniaceae; Spermatophytes; Bryophytes |
| Leland J. Gier |
Algae; Bryophytes; Cryptogams; Phanerogams |
| Auguste F. M. Glaziou |
Spermatophytes; Bryophytes; Lichens |
| Henry A. Gleason |
Pteridophytes; Spermatophytes; Melastomataceae; Bryophytes |
| Sherel Goodrich |
Spermatophytes |
| Roger D. Goos |
Mycology |
| Jean-Jaques de Granville |
Spermatophytes |
| Abel J. Grout |
Bryophytes; Mycology; Pteridophytes; Musci; Ferns; Spermatophytes |
| John G. Guccion |
Lichens; Bryophytes |
| Robert Hagelstein |
Algae; Mycology; Myxomycetes; Bryophytes |
| Roy Edward Halling |
Agaricales; Mycology; Boletales; Bryophytes; Lichens |
| Inez M. Haring |
Bryophytes |
| Raymond M. Harley |
Algae; Lamiaceae; Spermatophytes; Bryophytes |
| Roland M. Harper |
Algae; Bryophytes; Pteridophytes; Spermatophytes |
| Robert A. Harper |
Algae; Fungi; Spermatophytes |
| William H. Harris |
Jamaica flora; Algae; Bryophytes; Mycology; Spermatophytes; Lichens |
| Richard Clinton Harris |
Algae; Lichens; Mycology |
| Hermann E. Hasse |
Lichens; Bryophytes; Mycology; Spermatophytes |
| Emile Hassler |
Spermatophytes |
| Gert Guenter Hatschbach |
Algae; Spermatophytes; Lichens |
| Caroline C. Haynes |
Bryophytes |
| Amos Arthur Heller |
Algae; Bryophytes; Mycology; Pteridophytes; Spermatophytes |
| Andrew J. Henderson |
Spermatophytes; Arecaceae |