Coefficient of Conservatism:
Coefficient of Wetness:
G. E. Crow
Floating on still water of ponds and river backwaters in southernmost Michigan; rare and seemingly transient in appearance from year to year.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 23, 2018. http://www.michiganflora.net/species.aspx?id=533.