Peyritschia deyeuxioides (Kunth) Finot

Trisetum deyeuxioides (H.B.K.) Kunth, Rev. Gram
102. 1829.
Avena deyeuxioides H.B.K. Nov. Gen. & Sp. 1: 147. 1815.
Trisetarium deyeuxioides Poir. in Lam. Encyc. Suppl. S: 366. 1817. (Based on Avena deyeuxioides
H.B.K.) Avena trichopodia Presl, Rel. Haenk. 1: 254. 1830. (Type from Mexico.) Deyeuxia Iriflora Nees, Linnaea 19: 691. 1847. (Based on Avena deyeuxioides H.B.K.)
Perennial; culms erect or decumbent at base, glabrous, 3-5-noded below the middle, 60-120 cm. tall; sheaths glabrous or scabrous; ligule thin, truncate, erose, 2-3 mm. long; blades flat, scabrous, 2-5 mm. wide; panicle narrow, rather dense, nodding, more or less lobed or interrupted, 10-20 cm. long, the axis glabrous or scaberulous, the branches scabrous, ascending, mostly floriferous from near the base; spikelets 5-6 mm. long, mostly 2-flowered, the rachilla-joints about 1.5 mm. long, copiously villous on the upper part, the hairs 2-3 ram. long, the callus sharp, densely short-pilose; glumes narrow, acuminate, scabrous at least on the keel, the second similar to the first; lemmas narrow, rounded on the back, incurved on the margins, glabrous or slightly scaberulous, about 5 mm. long; awn attached just above the middle, geniculate, spreading, the lower part flexuous or twisted.
Type locality: Lake Texcoco, Mexico [State).
Distribution: Ditches, banks of streams, and wet places, Mexico to Ecuador.