Both species are introduced from Europe and are rarely established locally in disturbed places.
1. Inflorescence elongate, more than 4 times as long as broad; awns less than 2 mm long.
1. Inflorescence ± ovoid, less than 4 times as long as broad (excluding awns); awns (at least the longest) 1 cm or more long.
All species found in Cynosurus
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2019. https://www.michiganflora.net/genus.aspx?id=Cynosurus.