1. Panicle contracted, 0.5–2.5 cm wide, branches densely flowered nearly to the base.
1. Panicle more diffuse and broad, mostly 3.5–10 cm broad, panicle branches not bearing spikelets to the base.
All species found in Apera
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 23, 2019. https://www.michiganflora.net/genus.aspx?id=Apera.