Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
A European species, long cultivated. Escaped into the forested slopes of the Huron River in Ann Arbor, Washtenaw Co., where first collected by C. Nimke in 1971.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 17, 2018. http://www.michiganflora.net/species.aspx?id=1627.