Setaria reverchonii subsp. reverchonii

Sheaths almost glabrous; blades 15-30 cm long, 1-3 mm wide. Spikelets 3.5-4.5 mm, elliptic, subtending bristles 5-8 mm. Lower glumes 5-7-veined; upper glumes 7-veined. 2n = 36, 72.

Setaria reverchonii subsp. reverchonii grows in sandy prairies and limestone hills from southwestern Texas to northern Mexico.