Muhlenbergia setifolia Vasey

Muhlenbergia setifolia Vasey, Bot. Gaz. 7: 92. 1882
Perennial ; culms densely cespitose, erect, .slender, wiry, puberulent, 50-80 cm. tall ; sheaths glabrous, overlapping at base of plant; ligule thin, 8-10 mm. long, widely decurrent on the sheath; blades involute, fine, scarcely 0.5 mm. thick, scabrous, flexuous or curly, as much as 20 cm. long; panicle narrow, open, erect, 10 to 15 era. long, the axis puberulent, the branches capillary, ascending, flexuous; naked below, rather few-flowered, the pedicels longer than the spikelets; glumes one third to one half as long as the lemma, obtuse to subacute, often with a short delicate awn; lemma acuminate, glabrous, minutely pubescent on the callus, the awn slender, scabrous, flexuous, 1.5-2 cm. long.
Type locality: Guadalupe Mountains, Texas (Havard).
Distribution: Rocky hills, western Texas to Arizona and northern Mexico.