Thayer, Emma Homan (1842 - 1908)
Biographical:
Illustrated Wild Flowers of the Pacific Coast (1887). Studied and exhibited at the National Academy of Design and the Art Students League in New York. Describes her experiences finding the plants that she would then illustrate.
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Thornton, Robert John (1765 - 1832)
Tonge, Olivia Frances (1858 - 1949)
Natural History Museum, London: Olivia Frances Tonge
Turpin, Pierre Jean François (1775 - 1840)
Turpin, Pierre-Jean-Francois: Biographical
Wikipedia: Pierre Jean Francois Turpin
Rare Books from the MBG Library: Pierre Jean Francois Turpin
Twining, Elizabeth (1805 - 1889)
Biographical:
Illustrated The Plant World (1866)
Wikipedia: Elizabeth Twining
The Twickenham Museum: Elizabeth Twining
King's College London: Popular Botany in the Nineteenth Century