Leaves subcoriaceous, linear, with the midnerve very prominent on the underside and 2 of the lateral nerves more or less prominent above, serrulate-scabrous on margins and midnerve at least in the upper part, the apex gradually narrowed into a filiform, triquetrous, aculeate-scabrous acumen, hardly narrowed at the conduplicate base, brilliant metallic blue-green, 20-40 cm by 2-4 mm; sheaths stramineous. Scapes lateral, somewhat angular, very slender, much shorter than the leaves, (4-)8-15 cm by ⅓−⅔ mm the base clothed with some greenish or stramineous, striate, up to 15 mm long scales. Inflorescence consisting of a single spikelet, 6-10 by 2-3 mm. Bracts 2-3, oblong-lanceolate, obtusish, many-nerved, densely fuscous-puncticulate, 5-7 mm long, the lowest 1-3 mm distant. Glumes hardly differing from the bracts but somewhat narrower, with less conspicuous and less numerous nerves. Flowers 4-6 mm long; outermost scales sparsely ciliolate on the keel in the upper part. Stamens 3; anthers linear, white, 2-3 mm. Style 2-or 3-fid. Nut pyriform, terete, narrowed at the base, acuminate at the apex, dusky brown, darker spotted, slightly rugulose, 2¼-2½ by 1¼-1⅓ mm.
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