Edward Charles Jeffrey (May 21, 1866 – April 19, 1952) was a Canadian-American botanist who worked on vascular plant anatomy and phylogeny.

E. C. Jeffrey was born in St. Catharines, Canada West.

[3] In 1907 he was promoted to a full professorship of plant morphology.

In 1906, Jeffrey was elected a member of the American Academy of Arts and Sciences.

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