Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
A native of the warmer regions of the Old World, now widely introduced into the warmer areas of the New World, including the southern United States. Rarer in the north, and first found in Michigan in 2012 by R. W. Smith in Lenawee Co., as a common weed on the grounds of a nursery.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 27, 2021. https://www.michiganflora.net/species.aspx?id=2888.