Annual. Stems weak, densely tufted, compressed, sulcate, few-leaved at the base, 10-20 cm tall. Leaves shorter than the stems, setaceous, with pale brown sheaths. Inflorescence usually consisting of a single pseudolateral spikelet, sometimes a second spikelet on a reflexed peduncle added. Spikelet oblong-lanceolate, 4-5 by 1½ mm. Bract erect, as though continuing the stem, overtopping the spikelet(s). Glumes spiral, ovate, shortly mucronate, pale ferrugineous with green keel. Style long, with pyramidally thickened base; stigmas 3, short. Nut trigonous, broadly obovoid, truncate and quasi-tridentate at the apex, minutely reticulate, stramineous.
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