Coefficient of Conservatism:
Coefficient of Wetness:
A. A. Reznicek
A garden plant of European origin, collected blooming in a forest in Washtenaw Co. in November 1919 (B. A. Walpole 677, BLH; reported by him as H. viridis).
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=2374.