| 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 |
| LeRoy K. Henry |
Algae; Mycology; Spermatophytes |
| Augustine Henry |
Spermatophytes; Bryophytes |
| Frederick Joseph Hermann |
Bryophytes; Spermatophytes; Carex; Cyperaceae; Bryophytes |
| Larry C. Higgins |
Spermatophytes |
| Albert S. Hitchcock |
Spermatophytes; Poaceae; Pteridophytes; Bryophytes |
| Charles Leo Hitchcock |
Spermatophytes; Flora NW USA |
| Malcolm F. Hodges |
Lichens |
| Wilson Hoehne |
Spermatophytes; Arecaceae |
| Frederico C. Hoehne |
Spermatophytes; Bryophytes |
| Kjeld A. Holmen |
Bryophytes; Musci |
| Patricia K. Holmgren |
Spermatophytes |
| Noel H. Holmgren |
Scrophulariaceae; Intermountain Flora; Spermatophytes |
| John M. Holzinger |
Bryophytes; Spermatophytes; Mosses |
| Grace E. Howard |
Mycology; Spermatophytes; Bryophytes; Lichens |
| Marshall A. Howe |
Algae; Bryophytes; Mycology |
| Robert Root Ireland, Jr. |
Bryophytes |
| Howard S. Irwin |
Spermatophytes; Legumes; Lichens |
| Edwin James |
Spermatophytes; Major Stephen H. Long Expedition |
| Jomar Gomes Jardim |
Spermatophytes; Rubiaceae |
| George S. Jenman |
Pteridophytes; Spermatophytes; Phanerogams; Bryophytes |
| George T. Johnson |
Lichens; Bryophytes |
| Marcus E. Jones |
Mycology; Pteridophytes; Spermatophytes |
| Jacquelyn A. Kallunki |
Spermatophytes; Lichens |
| David D. Keck |
Spermatophytes |
| William Ashbrook Kellerman |
Algae; Bryophytes; Mycology; Spermatophytes |
| Ellsworth P. Killip |
Algae; Bryophytes; Pteridophytes; Spermatophytes; Lichens |
| Roberto M. Klein |
Spermatophytes |
| Charles L. Kramer |
Mycology; Taphrinales; Lichens |
| Boris A. Krukoff |
Spermatophytes; Bryophytes |
| Carl E. O. Kuntze |
Algae; Bryophytes; Pre-Linnaean; Spermatophytes |
| Douglas M. Ladd |
Mycology; Lichens |
| Elisabeth Lay |
Lichens |
| William H. Leggett |
Spermatophytes; Bryophytes |
| John B. Leiberg |
Algae; Bryophytes; Mycology; Spermatophytes |
| William A. Leighton |
Mycology; Spermatophytes; Lichens |
| James Colin Lendemer |
Lichens |
| Frère León |
Algae; Bryophytes; Mycology; Pteridophytes; Spermatophytes |
| P. V. LeRoy |
Bryophytes; Spermatophytes |
| Charles L. Lesquereux |
Algae; Bryophytes; Fossils; Spermatophytes; Mosses |
| Jan C. Lindeman |
Spermatophytes |
| Alain H. Liogier |
Spermatophytes; Algae; Lichens |
| Deborah Jean Lodge |
Mycology |
| Wayne D. Longbottom |
Spermatophytes; Bryophytes; Pteridophytes; Eastern North America |
| Josiah L. Lowe |
Mycology; Lichens; Bryophytes |
| James L. Luteyn |
Spermatophytes; Ericaceae; Lichens |
| Paulus J. M. Maas |
Spermatophytes; Neotropical Annonaceae; Costaceae; Zingiberaceae; Bryophytes |
| Kenneth K. Mackenzie |
Pteridophytes; Spermatophytes; Cyperaceae; Carex; Bryophytes |
| John Macoun |
All groups; Algae; Bryophytes; Mycology; Spermatophytes |
| Bassett Maguire |
Algae; Bryophytes; Pteridophytes; Spermatophytes; Lichens |
| George E. Massee |
Mycology |