Perennial. Culms tufted, erect or slightly geniculate, 90–120 cm tall. Leaf sheaths glabrous but margins ciliate upward; leaf blades linear, flat, up to 45 × 0.8 cm, glabrous, smooth or scaberulous, especially on adaxial surface, tapering to a long filiform apex; ligule ca. 0.5 mm. Panicle effuse, up to 45 × 20 cm; branches up to 10 cm, widely spreading with scattered spikelets. Spikelets grayish green, ca. 2 mm; lower glume elliptic-oblong, 0.5–0.75 mm, veinless, emarginate; upper glume elliptic, ca. 1/2 spikelet length, veinless, subobtuse; lemma lanceolate, as long as spikelet, very indistinctly veined, acuminate. Anthers 3, 0.8–1 mm. Grain obovate, ca. 1 mm, apex truncate. 2n = 24.
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