Triniochloa micrantha (Scribn.) Hitchc.

Triniochloa micrantha (Scribn.) Hitchc. Contr. U. S. Nat Herb. 17: 304. 1913.
Avena micranlha Scribn. Circ. U. S. Dep. Agr. Agrost. 19: 3. 1900.
Culms cespitose, slender, erect or somewhat decumbent, glabrous, 20-40 cm. tall; sheaths glabrous, striate-sulcate; ligule thin, hyaline, evanescent, 5-8 mm. long; blades slender, involute, slightly scaberulous beneath, pilose on the upper surface, 5-15 cm. long, scarcely 1 mm. wide; panicles pale, narrow, 8-12 cm. long, the axis glabrous or nearly so; branches slender, mostly solitary, finally spreading, 1-3 cm. long, bearing one to few spikelets; glumes thin, acuminate, glabrous, pale or the center purplish, the first 7-8 mm. long, the second 3-4 mm. longer; lemma about 1 cm. long, glabrous, the callus densely pilose with hairs 3-4 mm. long, the summit with 2 soft slender teeth; awn 2-3 mm. below summit of lemma, geniculate, the lower slightly twisted part about 5 mm. long, the upper nearly straight part 1-1.5 cm. long; palea about as long as the lemma.
Type Locality: Sierra de Tepoxtlan, Morelos, Mexico {Pringle S018). Distribution: Mossy cliffs; known only from the type locality.