Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
The occurrence of this species in Michigan rests on a fragmentary specimen from near Alma, Gratiot Co. (C. A. Davis in 1894, US) and one cannot help but wonder whether some mixture of specimen or data occurred long ago. The species ranges otherwise southwest of Michigan, but is known close enough in northwestern Indiana that it might be discovered at a more likely site in southwestern Michigan. It is now also included in some so called prairie plantings and was collected as "Persisting...about 20 years" in such a planting in Lenawee Co. (not mapped).
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://michiganflora.net/species.aspx?id=438.