Pereilema crinitum J. Presl

Pereilema crinitum Presl, Rel. Haenk. 1: 233. 1830
Pereilema crinitum var. cirratum Fourn. Mex. PI. Gram. 93. 1886. (Several specimens cited from Orizaba and Cordoba.)
Culms erect or more or less branching and spreading at base, slender, glabrous, mostly 2or 3-noded, 20-40 cm. tall; sheaths glabrous or scaberulous at least toward the summit; ligule thin, erose, about 0.5 mm. long; blades flat, thin, scabrous5-20 cm. long, 1-4 mm. wide, usually narrowed at the auricled base, the auricles ciliate or pilose; panicles more or less nodding or flexuous, 5-20 cm. long, pale or purplish, the axis angled, scabrous, the branches not deciduous, short, densely flowered, the lower often distant and as much as 3 cm. long; bristles about as long as the awns of the glumes; glumes thin, hyaline, oblong, glabrous, about 1 mm. long, abruptly narrowed into a straight scabrous awn 2-3 mm long; lemma terete, gradually narrowed from near the base, densely short-pilose at base, faintly scaberulous above, about 1.5 mm. long, the awn slender, flexuous, 1.5-2.5 cm. long; palea about as long as the lemma.
Type locality: Panama
Distribution: Open ground, brushy slopes, and moist hanks, at low and medium altitudes, Mexico to Ecuador.