Coefficient of Conservatism:
Coefficient of Wetness:
Shallow water of lakes and rivers; a native of the Old World first collected in Monroe Co. in 1949 but still local in Michigan though becoming aggressive in some parts of the United States.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 17, 2018. http://www.michiganflora.net/species.aspx?id=1454.