Perennial herb, tufted, 0.30-0.45 m high. Leaves: sheaths chestnut-brown, old outer sheaths cancellate; blades setaceous, 0.5-1.0 mm wide. Culm nodose, terete, ± 1.2 mm in diam. Inflorescence a narrow, dense, erect panicle 100-150 x 8-12 mm. Subtending bracts sheathing culm, blade well developed at lowest node, dark brown to blackish. Spikelets narrowly elliptic, 6-7 mm long, 2-flowered, lower flower male, upper bisexual. Glumes: fertile distichous, lanceolate, ± 4.5 mm long, keel non-excurrent. Perianth absent. Flowering time Aug.-Feb., Apr., May. Nutlet ± 2.5 mm long, stalked, light brown; style base ± conical, surface wrinkled.
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Tufted perennial, 30-80 cm. Spikelets dark brown.