Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
A European native rarely introduced into roadsides and ditches. First collected by B. T. Hazlett in Leelanau Co. in 1985. The very elongated, strongly ribbed fruits with sparse, stiff appressed hairs on the ribs are distinctive.
Only on Bois Blanc, Mackinac, Round Islands
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 16, 2022. https://michiganflora.net/species.aspx?id=128.