Coefficient of Conservatism:
Coefficient of Wetness:
A southern species known from a sandy meadow in Berrien Co., where collected by K. Dritz in 1990. This resembles a large variant of D. sphaerocarpon, but in addition to the features in the key, the panicle branches and the slightly swollen zone below the nodes lack the characteristic small yellowish or whitish elliptic glands of D. sphaerocarpon (visible only at higher magnification (30×)). Upper nodes of D. sphaerocarpon are also usually clearly antrorsely bearded, while those of D. polyanthes are merely finely puberulent. Often known as Panicum polyanthes or P. sphaerocarpon var. polyanthes (Schult.) Sherif.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 16, 2017. http://michiganflora.net/species.aspx?id=2083.