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* '''Taken.''' - [[Makoto Takenouchi]]
* '''Takht.''' - [[Armen Takhtajan]]
* '''P.C.Tam''' - [[Pui Cheung Tam]]
* '''Tardieu''' - [[Marie Laure Tardieu]] (1902- )
* '''Tchich.''' - [[Petr Aleksandrovich Tchichatscheff]]
* '''Teixeira''' - [[Alcides Ribeiro Teixeira]] (1918- )
* '''Ten.''' - [[Michele Tenore]]
* '''Temminck''' - [[Thylacinus Temminck]] (†1827)
* '''Teppner''' - [[Herwig Teppner]] (*1941)
* '''Tharp''' - [[Benjamin Carroll Tharp]]
* '''Thaxt.''' - [[Roland Thaxter]] (1858-1932)
* '''Theiss.''' - [[Ferdinand Theissen]] (1877-1919)
* '''Thomson''' - [[Thomas Thomson]]
* '''Thonn.''' - [[Peter Thonning]] (1775-1848)
* '''Thore''' - [[Jean Thore]]
* '''Thouars''' - [[Louis Marie Aubert du Petit Thouars]] (1758-1831)
* '''Thuil.''' - [[Jean Louis Thuillier]]
* '''Thunb.''' - [[Carl Peter Thunberg]]
* '''Tiegh.''' - [[Philippe Van Tieghem]]
* '''Tod.''' - [[Agostino Todaro]]
* '''Tomiya''' - [[Tomiya]]
|
* '''Torr.''' - [[John Torrey]]
* '''Toumey''' - [[James William Toumey]]
* '''Tourn.''' - [[Joseph Pitton de Tournefort]] (1656-1708)
* '''Trab.''' - [[Louis Charles Trabut]]
* '''Trad.''' - [[John Tradescant]]
* '''Tranzschel''' - [[Vladimir Tranzschel]] (1868-1942)
* '''Trautv.''' - [[Ernst Rudolf von Trautvetter]]
* '''Traverso''' - [[Giovanni Battista Traverso]] (1878-1955)
* '''Trel.''' - [[William Trelease]]
* '''Trevis.''' - [[Vittore Benedetto Antonio Trevisan de Saint-Léon]]  (1818-1897)
* '''Troitsky''' - [[N.A. Troitsky]]
* '''Tschonoski''' - [[Tschonoski]]
* '''Tsiang''' - [[Ying Tsiang]] 
* '''Tswett''' - [[Mikhail Tsvet]]
* '''Tuck.''' - [[Edward Tuckerman]]
* '''J.M.Tucker''' - [[John Maurice Tucker]]
* '''C.Tul.''' - [[Charles Tulasne]] (1816-1884)
* '''Tul.''' - [[Louis René Tulasne]] (1815-1885) 
* '''Turcz.''' - [[Porphir Kiril Nicolai Stepanowitsch Turczaninow]]  (1796-1863)
* '''Turra''' - [[Antonio Turra]]
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