Coefficient of Conservatism:
Coefficient of Wetness:
A Eurasian species, rarely escaped from cultivation, as locally on Mackinac Island (W. R. Overlease in 1994, MICH).
Only on Bois Blanc, Mackinac, Round Islands
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 14, 2017. http://www.michiganflora.net/species.aspx?id=701.