Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
Agricultural fields, introduced in North America from Europe. First collected in Ingham Co. in 1886 but still uncommon in Michigan though a serious weed elsewhere; see Rabeler & Crowder (1985).
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. August 10, 2020. https://michiganflora.net/species.aspx?id=2010.