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Penstemon tenuiflorus Pennell. Plateau Beardtongue, Limestone Beardtongue, Kentucky Beardtongue. Phen: Apr-Jun. Hab: Dry woodlands, glades, prairies, barrens, cliffs, especially over limestone or other calcareous rocks. Dist: Endemic to the Interior Low Plateau of wc. KY, c. TN, n. AL, extending slightly into the Coastal Plain to the west, and disjunct in the Black Belt of AL and MS.

Origin/Endemic status: Endemic

Synonymy: = C, F, FNA17, G, K1, K3, K4, S, Tn, Clements, Baskin, & Baskin (1998), Estes (2012), Pennell (1935)

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image of plant© Alan Cressler: Penstemon tenuiflorus, Nettle Glade, Ketona Dolomite, Kathy Stiles Freeland Bibb County Glades Preserve, The Nature Conservancy, Bibb County, Alabama 2 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: Penstemon tenuiflorus, Pool Glade, Ketona Dolomite, Bibb County, Alabama 1 by Alan Cressler source

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