Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
Fields and openings, apparently very rare in Michigan.
The corolla tends more often to pink-violet in this species than in the normally white P. digitalis.
St. Clair County
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://michiganflora.net/species.aspx?id=1956.