Coefficient of Conservatism:
Coefficient of Wetness:
A. A. Reznicek
A European species occasionally cultivated and rarely escaped into disturbed forests and forest edges. First collected by T. L. Walters in Monroe Co. in 2002.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://www.michiganflora.net/species.aspx?id=2647.