| John Torrey |
Algae; Bryophytes; Euphorbiaceae; Mycology; Pteridophytes; Spermatophytes |
| Erin Anne Tripp |
Acanthaceae; Algae; Bryophytes; Lichens; Spermatophytes |
| Lucien M. Underwood |
Algae; Bryophytes; Mycology; Pteridophytes; Spermatophytes |
| Sereno Watson |
Algae; Bryophytes; Euphorbiaceae; Pteridophytes; Spermatophytes; Clarence King Expedition |
| Winona H. Welch |
Algae; Bryophytes; Spermatophytes; Lichens |
| Percy Wilson |
Algae; Bryophytes; Lichens; Mycology; Spermatophytes |
| Richard D. Wood |
Algae; Characeae |
| Charles Wright |
Algae; Bryophytes; Lichens; Mycology; Pteridophytes; Spermatophytes |
| Truman G. Yuncker |
Algae; Cuscuta; Piperaceae; Pteridophytes; Spermatophytes |
| Sanford M. Zeller |
Algae; Mycology |