Plants annual; not stoloniferous. Culms 1-35 cm, usually decumbent
and geniculate, occasionally rooting at the lower nodes. Ligules 0.4-1
mm; blades 0.5-5(9) cm long, 0.7-3 mm wide. Panicles 0.7-9 cm,
with (2)4-11 branches; branches 10-27 mm, scabrous, with 20-40 spikelets.
2n = 20.
Bouteloua barbata var. barbata grows in loose sands, rocky slopes,
and washes, often on disturbed soils, usually at elevations below 2000 m. Its
range extends from the southwestern United States to northwestern Mexico.