T
- Hisayoshi Takeda (also known as Takeda Hisayoshi)
- Armen Takhtajan
- John Templeton
- Theophrastus
- Graham Stuart Thomas
- William Thompson
- George Thomson
- Louis-Marie Aubert du Petit-Thouars
- Carl Peter Thunberg
- Agostino Todaro
- John Torrey
- Joseph Pitton de Tournefort
- John Tradescant the elder
- John Tradescant the younger
- Ernst Rudolf von Trautvetter
- Mikhail Tsvet
- Edward Tuckerman
- William Turner
- Tom Tutin
Read more about this topic: List Of Botanists