Coefficient of Conservatism:
Coefficient of Wetness:
Collected by O. A. Farwell in Houghton Co. in 1934 and 1935. F. J. Hermann collected from presumably the same colony in 1936 (7926, GH), citing the habitat as a dry pasture. Presumably introduced from the west.
The deeply pinnatifid leaflets with narrowly revolute margins indicate our material is P. gracilis var. flabelliformis (Lehm.) Torr. & A. Gray.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 22, 2018. http://www.michiganflora.net/species.aspx?id=2505.