Coefficient of Conservatism:
Coefficient of Wetness:
A native of Europe, collected in 1893 by O. A. Farwell (1004a, BLH) and said by him to be “frequently seen in waste places … at Detroit,” (Wayne Co.). Apparently not collected since in Michigan.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 22, 2018. http://michiganflora.net/species.aspx?id=2771.