Glabrous; rhizome hardly 1/10 in. diam., horizontal, stems 8-10 in. long, tufted, slender, terete, with nodes (bearing leaves or bracts) scattered throughout their length; basal leaf-sheaths brown, more or less torn into fibres; basal leaves 3-8 in. long, 1/16 in. broad at the base, flat but (when dry) rolled up; stem-leaves and bracts similar, but shorter, from tight cylindric chestnut-brown or pale sheaths; panicle elongate, narrow, often carried down nearly to the base of the stem; branches axillary, 1-4 in. long, carrying near the top 3 or 4 spikelets; spikelets 1/4 by 1/8 in., elliptic-lanceolate, hard, somewhat flattened, rusty-brown; lower empty glumes 6-5, small; flower-glumes hardly acute; lower flower male with an imperfect upper bisexual, producing a nut; hypogynous bristles 3-4, minute, setaceous (according to Schrader and so seen at Kew), but 6-3 capillary plumose ferruginous according to Boeckeler; stamens 3; anthers of the genus hardly eared at the base; style 3-fid.
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Tufted perennial, 10-30 cm. Spikelets rusty brown.