Perennial with a knotty rootstock clad in tomentose scales; culms 50–100 cm. high, hard, almost cane-like, geniculately ascending.. Leaf-blades broadly linear to narrowly lanceolate, 3–15 cm. long, 3–9 mm. wide.. Inflorescence lanceolate, 8–20 cm. long, of numerous short spreading racemes arranged in untidy whorls on a long central axis; racemes 2–6 cm. long, the spikelets paired on a triquetrous rhachis sparsely adorned (especially towards the base) with long glistening hairs.. Spikelets narrowly elliptic, 1.8–2.2 mm. long; lower glume absent; upper glume 3/4–4/5 as long as the spikelet, 3-nerved, pubescent; lower lemma as long as the spikelet, 7-nerved, appressedly pubescent; fruit ellipsoid, light brown.
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