Flora of the Southeastern United States
2022 Edition


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Penstemon Schmidel. Beardtongue, Penstemon.

Contributed by Alan S. Weakley and Dwayne Estes

Key to Penstemon

A genus of about 280 species, perennial herbs and shrubs, of w. North America, e. North America, and (a single species) ne. Asia.

Ref: Bennett (1963); Clements, Baskin, & Baskin (1998); Estes (2012); Freeman (2019d) In Flora of North America Editorial Committee (2019); Pennell (1935). Show full citations.

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