Penstemon digitalis Nutt. - Foxglove Beard Tongue


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Penstemon digitalis - (image 1 of 6)



Family: Scrophulariaceae


Low mesophytic woods, mesophytic sand prairies, mesic and dry prairies.




Nova Scotia and ME west to MN and SD, south to VA, AL, and TX.


Herbaceous perennial to 3' high. Leaves opposite, clasping or petiolate below, lanceolate, entire to serrate. Corolla white, scarcely ridged, inflated, this differentiated from the narrower tube; lower corolla lobes subequaling the upper lobes; sepals to 8 mm long, ovate at the base, the margins scarious, abruptly attenuated into a narrow green tip rarely exceeding 3mm long; anthers characteristically with a few course, white thick hair on the side opposite the suture. Stems glabrous.


Flowers late May to early July.

Wetland indicator: Facultative -

This species seems quite adaptable in the Midwest and can be found growing in open woods or mesic prairies.



Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY


Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.


USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (
National Plant Data Center, Baton Rouge, LA 70874-4490 USA.




 Michael Hough 2005