Theodora Lisle Prankerd (21 June 1878 – 11 November 1939) was a British botanist who worked on the growth of ferns, and lectured at Bedford College and the University of Reading.

[1] In 1912 she became a part-time Reader in Botany at Birkbeck College, London[citation needed].

[1] Colleagues included Tom Harris and Walter Styles, who wrote her obituary.

[1] Between 1922 and 1936 she published a series of pioneering studies in the growth of ferns in response to gravity (geotropism).

Although she was credited with all the research and authorship of the published papers, her work was presented at various scientific meetings by male colleagues.