Muhlenbergia flaviseta Scribn.

Muhlenbergia flaviseta .Scribn. Bull. U. .S. Dep. Agr. Agrost 8: 11. 1897.
Perennial, rather loosely tufted, the base scaly or rhizomatous; culras slender, erect or aiicending, glabrous, naked above, 1 5-30 cm. tall, the nodes near the base; sheaths glabrous, the lower short and overlapping; ligule a short ciliate border, the upperraost about 0.5 mm. long with longer appendages at the sides, the lower ones shorter; blades flat, .sometimes folded. especially toward the tip, scabrous on the upper surface and the white margins, mostly basal, the uppermost about one-fourth the distance from the base, attenuate at tip, 2-10 cm. long, 1-3 mm. wide; panicle condensed, ovoid or elliptic, yellowish brown or bronze, 2-5 cm. long, the axis angled, scaberulous, the branches scabrous-puberulent, appressed or ascending (more spreading in anthesis), the lower as much as 2 cm. long, floriferous from near the base, the pedicels pubescent; glumes unequal, rather broad, glabrous or nearly so, 1 -nerved, the first 1.5-2 mm. long, the second 3.5-4 mm. long; lemma narrow, scaberulous, about 4 mm. long, the awn slender, scaberulous, slightly fiexuous, yellow, 1-1.5 cm. long.
Type locality: Durango. Mexico (Palmer S34 in 1896). Distribution: Known only from the type locality.