Coefficient of Conservatism:
Coefficient of Wetness:
Cliffs near Lake Superior on Isle Royale, where collected by W. A. MacKinnon in 1997. Long known from northeastern Minnesota and adjacent Ontario.
Only on Isle Royale
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. August 17, 2019. https://michiganflora.net/species.aspx?id=227.