Dyn. D. acuminatum subs. columbianum.
This is a grass that is endemic to sand and dune communities. As such, it only grows in the few sand prairies that occur in Missouri in the bootheel region. It is a characteristic species for said communities and is unusual for hairy Missouri Dichantheliums by lacking hair along the center of the adaxial leaf surface.
Spikelets: 1.5-1.9 mm, broadly ellipsoid or obovoid, puberulent.
From FNA