Annual. Stems slender or medium, very sharply triquetrous, glabrous or sparsely pubescent, retrorsely scabrous on the angles, 2-3-noded below the inflorescence, 30-100 cm by 2-3 mm. Leaves gradually narrowed to the obtusish tip, glabrous or sparsely pubescent, antrorsely scabrous on the margins and the main nerves especially in the upper part, 3-6 mm wide; sheaths not winged, retrorsely scabrous, glabrous or pubescent on the anterior side; contraligule ovate or triangular, glabrous or ciliate, up to 3 mm long. Inflorescence narrow, elongate, consisting of a terminal panicle and 2-3 remote lateral ones, the terminal panicle 3-4 by 1 1½ cm, somewhat longer than the lateral ones, these single at the nodes, more rarely binate, their peduncles more or less (the lowest up to 10 cm) exserted from the sheaths, smooth or scabrid, 2-winged at the dilated top; primary bracts erect, much longer than the panicles in their axils, over-topping the inflorescence; secondary bracts subulate, much exserted from the panicles. Spikelets almost sessile (peduncle c. 1 mm long), glabrous, bisexual and ♂, or the ♂ part in the nut-bearing ones reduced to a sterile glume; ♂ spikelets lanceolate, c. 3 mm long; stamens 2-3; anthers linear, c. 1 mm long; nut-bearing spikelets 4 mm long; glumes broadly ovate-lanceolate, mucronulate, scabrid on the keel, pale, ferrugineous-striolate. Cupula 3-lobed, 1 mm wide. Disk triangular with rounded angles, not lobed, purplish puncticulate; scar of cupula 3-lobed. Nut shorter than the glumes, ovoid, obtusely trigonous, laterally compressed, truncate at the base, obtuse, not apiculate, glabrous, very smooth and shining, white, 2-2⅓ mm long, c. 2 mm wide, 1½-13/5 mm thick.
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