Coefficient of Conservatism:
Coefficient of Wetness:
A Eurasian species, found only locally as a weed in North America. Collected by C. Billington in 1916 on the shore of Cass Lake, Oakland Co.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 21, 2018. https://www.michiganflora.net/species.aspx?id=1544.