Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
Probably originated in southern Asia, now well known in cultivation throughout the world but only rarely escaped. Collected in 1925 as seedlings on the sandy shore of Douglas Lake, Cheboygan Co. (F. C. Gates 14196, UMBS).
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 20, 2019. https://michiganflora.net/species.aspx?id=881.