Leersia

1. Spikelets (at least larger ones) 4–5.5 mm long, 1.4–1.8 mm wide, mostly overlapping about the basal half of the next above; panicle branches 2–3 (–4) at (or near) the lowermost node of inflorescence.

L. oryzoides

1. Spikelets 3–4 mm long, 0.8–1.3 (–1.5) mm wide, the tip of one barely overlapping the base of the next above; panicle branches solitary at all nodes of inflorescence.

L. virginica

All species found in Leersia

Leersia oryzoidesCUT GRASS 
Leersia virginicaWHITE GRASS 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 14, 2017. http://michiganflora.net/genus.aspx?id=Leersia.