Coefficient of Conservatism:
Coefficient of Wetness:
A. A. Reznicek
A variable western American species, presumably adventive here. Collected at a mine site near Calumet, Houghton Co. (O. A. Farwell 11713 in 1937, BLH, GH). It is also known from the end of Sibley Peninsula, Ontario, north of Isle Royale.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 19, 2018. http://www.michiganflora.net/species.aspx?id=2506.