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Tufted perennial 200-600 mm high; basal sheaths broad, papery, margins with long downy hairs. Leaf blade setaceous. Inflorescence pedicel and rachis internodes swollen. Sessile spikelet 6.0-8.5 mm long, dark purple; pedicelled spikelet up to 6 mm long. Both spikelets lower glumes hairy on the prominent nerves, hairs short, stiff, tubercle-based; the callus has a central peg; anther 2-3 mm long.
Inflorescence 7–9 cm long, with a short central axis up to 2 cm long; racemes 2–4, each pedunculate and 4–6 cm long; internodes and pedicels linear, subclavate to inflated upwards, smooth and glabrous to shortly pilose.
Pedicelled spikelet similar to the sessile spikelet but usually smaller, with a well developed callus, this bearing a central peg; pedicels half as long to as long as the internodes.
Densely caespitose perennial, the basal sheaths broad and papery, sometimes flabellate; culms up to 80 cm high, erect.
Leaf laminas up to 40 cm × 1 mm, setaceous.
