Paspalum

1. Spikelets borne singly along the rachis; mostly 2.6–3 mm long.

P. laeve

1. Spikelets borne in pairs along the rachis (rarely one of the pair aborted, but still represented by a pedicel), mostly 1.8–2.3 mm long.

P. setaceum

All species found in Paspalum

Paspalum laeveSMOOTH LENS GRASS 
Paspalum setaceumHAIRY LENS GRASS 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 27, 2017. http://michiganflora.net/genus.aspx?id=Paspalum.