Coefficient of Conservatism:
Coefficient of Wetness:
Native farther south, adventive in Michigan along railroads and in disturbed ground and first collected in 1922 in Oakland Co.
Van Buren County
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 16, 2017. http://michiganflora.net/species.aspx?id=1246.