Coefficient of Conservatism:
Coefficient of Wetness:
Borders of forests and in rock crevices along the Lake Superior shore. A boreal species, which ranges south to northern New England and Lake Superior. Apparently extant only on Isle Royale, records from the mainland of the Upper Peninsula are very old.
Including Isle Royale
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 23, 2021. https://www.michiganflora.net/species.aspx?id=913.