| Harry A. Allard |
Spermatophytes; Bryophytes |
| John Alphaeus Allen |
Algae; Bryophytes; Spermatophytes |
| Oscar Dana Allen |
Algae; Characeae; Bryophytes; Spermatophytes |
| Bruce Hampton Allen |
Bryophytes; Lichens |
| Gladys P. Anderson |
Lichens; Spermatophytes; Bryophytes |
| Lewis E. Anderson |
Bryophytes |
| Coe F. Austin |
Bryophytes; Lemnaceae; Spermatophytes; Lichens |
| Charles F. Baker |
Algae; Mycology; Spermatophytes; Bryophytes |
| Miguel Bang |
Spermatophytes; Bryophytes; Lichens |
| John H. Barnhart |
Spermatophytes; Bryophytes |
| Joseph Barratt |
Spermatophytes; Salix; Bryophytes |
| A. T. Beals |
Mosses; Spermatophytes; Bryophytes |
| Albert R. Bechtel |
Spermatophytes; Mycology; Bryophytes |
| George N. Best |
Bryophytes; Spermatophytes |
| Eugene P. Bicknell |
Spermatophytes; Characeae; Bryophytes |
| Henry N. Bolander |
Algae; Bryophytes; Cryptogams; Musci; Orchidaceae; Phanerogams; Spermatophytes |
| Brian M. Boom |
Spermatophytes; Theaceae; Rubiaceae; Bryophytes; Lichens |
| Lois Brako |
Mycology; Bryophytes; Lichens |
| Ruth O. S. Breen |
Algae; Bryophytes |
| 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 |
| Roy F. Cain |
Bryophytes; Fungi; Cryptogams |
| William Wirt Calkins |
Mycology; Lichens; Bryophytes |
| William M. Canby |
Spermatophytes; Cryptogams; Bryophytes |
| Andre Mauricio Viera de Carvalho |
Spermatophytes; Fabaceae; Dalbergia; Bryophytes |
| Alvan Wentworth Chapman |
Algae; Angiosperms; Bryophytes; Pteridophytes; 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 |
| Henry S. Conard |
Bryophytes; Spermatophytes |
| Richard S. Cowan |
Spermatophytes; Bryophytes |
| Thomas B. Croat |
Spermatophytes; Araceae; Lichens; Bryophytes |
| Howard A. Crum |
Bryophytes; Lichens |
| Douglas Charles Daly |
Spermatophytes; Burseraceae; Loganiaceae; Bryophytes |
| Isa (Irmgard) Degener |
Algae; Plants of Hawaii; Bryophytes; Spermatophytes |
| Otto Degener |
Pteridophytes; Spermatophytes; Flora of Hawaii; Bryophytes; Lichens |
| Herbert M. Denslow |
Spermatophytes; Bryophytes |
| William R. Dudley |
Mycology; Spermatophytes; Bryophytes |
| 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 |
| Adolph D. E. Elmer |
All groups; Pteridophytes; Spermatophytes; Bryophytes; Mycology |
| Bruce Fink |
Algae; Bryophytes; Lichens; Mycology; Spermatophytes |
| Seville Flowers |
Bryophytes; Pteridophytes; Algae; Spermatophytes; Mycology |
| Theodore C. Frye |
Algae; Pteridophytes; Spermatophytes; Bryophytes; Phanerogams |
| George Gardner |
Algae; Bryophytes; Pteridophytes; 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 |
| 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 |
| William H. Harris |
Jamaica flora; Algae; Bryophytes; Mycology; Spermatophytes; Lichens |
| Hermann E. Hasse |
Lichens; Bryophytes; Mycology; Spermatophytes |
| Caroline C. Haynes |
Bryophytes |
| Amos Arthur Heller |
Algae; Bryophytes; Mycology; Pteridophytes; Spermatophytes |
| Augustine Henry |
Spermatophytes; Bryophytes |
| Frederick Joseph Hermann |
Bryophytes; Spermatophytes; Carex; Cyperaceae; Bryophytes |
| Albert S. Hitchcock |
Spermatophytes; Poaceae; Pteridophytes; Bryophytes |
| Frederico C. Hoehne |
Spermatophytes; Bryophytes |
| Kjeld A. Holmen |
Bryophytes; Musci |
| John M. Holzinger |
Bryophytes; Spermatophytes; Mosses |
| Grace E. Howard |
Mycology; Spermatophytes; Bryophytes; Lichens |
| Marshall A. Howe |
Algae; Bryophytes; Mycology |
| Robert Root Ireland, Jr. |
Bryophytes |
| George S. Jenman |
Pteridophytes; Spermatophytes; Phanerogams; Bryophytes |