Plants not rhizomatous. Culms slender, 1-2(2.5) mm thick at the
base. Uppermost sheaths 0.8-2.5 mm wide. Panicles with 16-36 spikelets
per cm2 when pressed. Fruits 1.1-1.7 mm.
Sporobolus compositus var. drummondii is most abundant in Kansas,
Oklahoma, and Texas.