Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
A plant of disturbed, sunny sites; collected as a spontaneous weed by R. W. Smith in Lenawee Co. in 2004. A European species cultivated for its white-woolly foliage.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://www.michiganflora.net/species.aspx?id=1601.