| Edward J. Alexander |
Algae; Spermatophytes; Iridaceae |
| Miguel N. Alexiades |
Spermatophytes; Ethnobotanical studies |
| Harry A. Allard |
Spermatophytes; Bryophytes |
| John F. Allen |
Spermatophytes |
| John Alphaeus Allen |
Algae; Bryophytes; Spermatophytes |
| Timothy F. Allen |
Algae; Characeae; Spermatophytes |
| Oscar Dana Allen |
Algae; Characeae; Bryophytes; Spermatophytes |
| Gladys P. Anderson |
Lichens; Spermatophytes; Bryophytes |
| William Russell Anderson |
Spermatophytes; Pteridophytes; Malpighiaceae; Lichens |
| Carol R. Annable |
Poaceae; Spermatophytes |
| Kate E. Armstrong |
Manilkara (Sapotaceae); Pteridophytes; Spermatophytes |
| Daniel E. Atha |
Spermatophytes; Pteridophytes; Polygonaceae; Acalypha; Flora of North America |
| Nephi Duane Atwood |
Spermatophytes; Hydrophyllaceae; Phacelia |
| Coe F. Austin |
Bryophytes; Lemnaceae; Spermatophytes; Lichens |
| Charles F. Baker |
Algae; Mycology; Spermatophytes; Bryophytes |
| William L. Balée |
Spermatophytes; Ethnobotanical studies |
| Michael J. Balick |
Spermatophytes; Economic Botany |
| Miguel Bang |
Spermatophytes; Bryophytes; Lichens |
| Howard J. Banker |
Algae; Mycology; Spermatophytes |
| Rupert C. Barneby |
Spermatophytes; Fabaceae |
| John H. Barnhart |
Spermatophytes; Bryophytes |
| Joseph Barratt |
Spermatophytes; Salix; Bryophytes |
| A. T. Beals |
Mosses; Spermatophytes; Bryophytes |
| Janice C. Beatley |
Spermatophytes |
| Albert R. Bechtel |
Spermatophytes; Mycology; Bryophytes |