| David R. Sumstine |
Algae; Mycology; Spermatophytes |
| Stephen S. Talbot |
Bryophytes |
| George H. H. Tate |
Mammology; Spermatophytes; Bryophytes; Lichens |
| Benjamin C. Tharp |
Algae; Mycology; Spermatophytes |
| Harry Delbert Thiers |
Mycology |
| Barbara M. Thiers |
Bryophytes |
| William Wayt Thomas |
Cyperaceae; Simaroubaceae; Spermatophytes; Bryophytes; Lichens |
| Arnold Gerard Tiehm |
Spermatophytes |
| Benjamin Marland Torke |
Spermatophytes; Swartzia (Fabaceae); Salvia |
| Raymond H. Torrey |
Spermatophytes; Bryophytes; Lichens |
| John Torrey |
Algae; Bryophytes; Euphorbiaceae; Mycology; Pteridophytes; Spermatophytes |
| Erin Anne Tripp |
Acanthaceae; Algae; Bryophytes; Lichens; Spermatophytes |
| Edward Tuckerman |
Mycology; Pteridophytes; Spermatophytes; Lichens; Bryophytes |
| Lucien M. Underwood |
Algae; Bryophytes; Mycology; Pteridophytes; Spermatophytes |
| Anna M. Vail |
Leguminosae; Asclepiadaceae; Spermatophytes; Characeae; Bryophytes |
| Arthur C. Waghorne |
Spermatophytes; Bryophytes; Lichens |
| Jay B. Walker |
Spermatophytes; Lamiaceae |
| Sereno Watson |
Algae; Bryophytes; Euphorbiaceae; Pteridophytes; Spermatophytes; Clarence King Expedition |
| Winona H. Welch |
Algae; Bryophytes; Spermatophytes; Lichens |
| Arthur L. Welden |
Mycology |
| Stanley L. Welsh |
Spermatophytes |
| Margaret J. Williams |
Spermatophytes |
| Robert Statham Williams |
Lichens; Bryophytes; Spermatophytes |
| Percy Wilson |
Algae; Mycology; Spermatophytes; Bryophytes; Lichens |
| Richard D. Wood |
Algae; Characeae |