Coefficient of Conservatism:
Coefficient of Wetness:
Presumably adventive from farther south. The only Michigan collections are by O. A. Farwell, from “low grounds” at Redford, Wayne Co., in 1932 and 1933 (9196, MICH, BLH) Michigan specimens are var. calycosa A. Gray.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 14, 2017. http://michiganflora.net/species.aspx?id=2604.