Coefficient of Conservatism:
Coefficient of Wetness:
A Eurasian species, widespread as a weed and known from scattered locations in North America. Collected in Washtenaw Co. in 1918 as a weed of grain fields, and on banks at Eloise in Wayne Co. in 1931. Specimens to support other reports from the state have not been found.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://michiganflora.net/species.aspx?id=671.