| 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 |