Once broadly construed, Agropyron is now restricted to the Eurasian crested wheatgrasses, characterized by keeled glumes and pectinate spikes. Other species included in Agropyron in Michigan Flora are now placed in Elymus, Pascopyrum, and Pseudoroegneria.
All species found in Agropyron
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 16, 2017. http://www.michiganflora.net/genus.aspx?id=Agropyron.