Muhlenbergia wrightii Vasey ex J. M. Coult.

Muhlenbergia wrightii Vasey, in Coult. Man. 409. 1885
Muhlenbergia coloradensis Mez, Repert. Sp. Nov, 17: 213. 1921. (Type from "Chiann [Cheyenne] Canyon," Colorado, Jones SOO.)
Perennial; culms densely cespitose, erect, slender, puberulent, scabrous below the panicle, about 3-noded, 30-60 cm. tall; sheaths glabrous; ligule truncate, about 1 mm. long; blades flat or usually folded or involute, erect, mostly 5-10 cm. long, scabrous, long-attenuate; panicle spikelike, erect, more or less interrupted below, 5-15 cm. long, the branches densely flowered, appressed, the lower 5-20 mm. long; glumes lanceolate, acuminate or awn-tipped, about 2 ram. long; lemma acuminate or mucronate, minutely pubescent on the lower half, about 3 mm. long.
Type locality: El Paso, Texas (Wright 1986).
Distribution: Plains, rocks, and canyons, Colorado, Utah, New Mexico, Arizona, and northern Mexico.