Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
A European species, well established since at least 1974 along a railroad on the Michigan State University campus (Ingham Co.).
The distinctive fruits are nearly spherical and covered with both black and white long hairs. As is often the case also in A. neglectus, the calyx has a mixture of short black and white hairs. The stipules are connate around the stem and the fruit is 2-locular; however, the fruit is thicker than in A. canadensis and all the hairs are simple (none 2-pronged).
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 26, 2020. https://michiganflora.net/species.aspx?id=1273.