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Habitat: Grass located in desert upland shrubland, co-dominating the grass species with tobosa grass in dry, sandy soil. The area is currently used for cattle grazing.

Growth form: Stoloniferous, perennial grass with wiry, creeping stolons that form mats.

Inflorescence a terminal contracted panicle, or spicate raceme.

Flowers: Golden to purplish in color, unisexual, staminate spikelets 5-20 flowered with exposed rachillas. Pistillate spikelets with 3-5 fertile florets each with 3 slightly twisted awns (7-14cm long).

Fruit: caryopsis, achene.

Leaves: Basal with short sheaths, often villous.