Glabrous annual with fibrous roots. Stems slender, tufted, compressed, obtusangular, smooth, 20-40 cm by c. 1 mm. Leaves ⅓-½ as long as the stems, erect, rather firm, flat, acute, scabrid on the margins in the upper part, 1-2 mm wide; ligule absent. Inflorescence subcompound or compound, very loose, with 5-20 spikelets, 3-6 cm long and wide. Involucral bracts 1-2, the lowest shorter than the inflorescence, 1-2 cm. Primary rays obliquely ascending, com-pressed, smooth, up to 4 cm. Spikelets solitary, narrowly ovoid, terete, acute, densely many-flowered, 6-8 by 2 mm; rachilla narrowly winged. Glumes spiral, membranous, ovate, obtusish with rounded apex, muticous, scarcely keeled, with a midnerve not reaching the apex, nerveless, light brown sides, and broad hyaline margins, c. 2½ by 1¾ mm. Stamens (2-)3; anthers linear, 1 mm. Style slender, flat, not margined, slightly dilated at the base, ciliate in the upper ⅓-½, 1½ mm long; stigmas 2, shorter than the style, 1 mm long. Nut biconvex, obovate, with acutish edges, shortly stipitate, umbonulate, verruculose, finely reticulate by the minute, roundish or transversely elliptic, not impressed epidermal cells, c. ¾ by 3/5 mm.
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