Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
A commonly cultivated hybrid, with “double” flowers and collected as an escape on a wooded hillside in Lenawee Co. in 1986 by R. W. Smith.
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=1446.