Slender, loosely tufted perennial, the base glabrous; culms wiry, 1–2 mm. wide at the base, 30–75 cm. high.. Leaf-blades linear, 15–30 cm. long, 4–6 mm. wide, tapering at the base, acuminate.. Panicle lax, narrowly ovate to narrowly oblong, 15–25(–30) cm. long, the branches flexuous and usually ascending.. Spikelets ovate, 2–2.5 mm. long, purple-tinged; lower glume ovate, 2/3–3/4 the length of the spikelet, 3–5-nerved, acuminate; upper glume ovate, 5-nerved, acute to acuminate; lower lemma, 5-nerved, male, its palea well developed; upper lemma pale and glossy.
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