Erect or decumbent-spreading, sparingly stoloniferous perennial; culms 60 cm. to more than 2 m. long, glabrous; sheaths rather densely pilose or sometimes nearly glabrous, usually shorter than the internodes; ligule a very short ciliate membrane; blades 5-17 cm. long, 1-3 cm. wide, acuminate, narrowed at the base to a petiole 2-3 cm. long, hispid on the upper surface, glabrous below with conspicuous cross-veins; panicle diffuse, 15-30 cm. long, about as wide, the branches rather readily disarticulating, stiffly spreading, spikelet bearing only at the ends; spikelets 6-7 mm. long; glumes subequal, acuminate, 3-4 mm. long, the first 3-nerved, the second 5-nerved, scabrous on the nerves; lemma about 6 mm. long, 5-nerved, sparsely scabrous. Moist woods, thickets, and stream banks, Mexico to Brazil and Peru
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