Perennial (always ?). Stems densely tufted, very slender, sharply 4-5-angled, ribbed, smooth, (20-)50-60 cm by c. ½ mm, the base clothed with 2-3, up to 7 cm long sheaths usually with very short blades. Basal leaves erect, flat, acute, glabrous, scabrid on the margins at the top, up to 35 cm long, 1-2 mm wide; ligule absent. Inflorescence simple (very rarely one of the rays with a short secondary ray), loose, with 3-7 spikelets, 1½-3 cm long, 2-4 cm wide. Involucral bracts 3-5, erect or somewhat excurved, setacous, dilated at the base, the lowest ½-1 cm. Rays 2-5, slender, obliquely patent to horizontally spreading, compressed, smooth, 5-15 mm. Spikelets solitary, lanceolate or oblong-lanceolate, strongly compressed, acute, 6-10-flowered, 5-10 by 2-4 mm; rachilla broadly winged. Glumes exactly distichous, subchartaceous, obliquely erect, ovate-lanceolate, acute, 1-nerved, sharply keeled, pubescent by soft hairs, not or hardly hyaline-margined, ciliolate in the upper part, 4½-5 by 2½-3 mm. Stamens 3; anthers linear, 1¾ mm. Style very slender, triquetrous, pyramidally thickened at the base, glabrous, 4 mm; stigmas 3, much shorter than the style. Nut trigonous, oblong-obovoid, shortly stipitate, umbonulate, sparsely verruculose, light brown, 1¼-1⅓ by 7/10 mm; epidermal cells isodiametric.
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