Culms 20–50 cm tall, ca. 0.7 mm in diam., 1-noded. Leaf sheaths yellowish brown, glabrous, becoming fibrous at base; leaf blades stiff, involute, 4–11 × 0.1–0.15 cm, adaxial surface and margins scabrid, apex acuminate; ligule 0.5–0.8 mm. Raceme 10–27 cm, loosely spiculate and tipped with a spikelet, spikelets 5–7 mm apart. Spikelets ovate-oblong, stramineous at maturity, 5–8 × 3–4 mm, florets 5–12 in middle part of raceme; glumes narrowly lanceolate, papery with membranous margins, 1-veined, acuminate; lower glume 2–2.5 mm; upper glume 2.5–3 mm; lemmas broadly ovate, lowest 2.8–3 mm, glabrous, obtuse; palea membranous, broadly ovate, ca. 2 mm, keels very narrowly winged, ciliolate. Anthers 3, ca. 0.6 mm. Fl. and fr. autumn and winter.
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