Coefficient of Conservatism:
Coefficient of Wetness:
Despite other reports from the state, the only Michigan collection seen was made by O. A. Farwell at Detroit, Wayne Co. in 1917 (BLH). This occurrence is somewhat out of range, and since he collected many cultivated plants the same day, it seems likely that this one was not native.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 17, 2017. http://www.michiganflora.net/species.aspx?id=1686.