Glabrous perennial with short rhizome. Stems tufted, rigid, sulcate-angular, compressed, smooth, or scabrid at the top, somewhat incrassate at the base, up to 65(-100) cm by 1-1½ mm. Leaves about ½ as long as the stems, canaliculate, rigid, rather abruptly acuminate, scabrid on the margins in the upper part, greyish green or glaucous, ½-1½ mm wide; sheaths brownish; ligule a dense fringe of short hairs. Inflorescence simple or subcompound, loose, with (1-)3-7(-11) spikelets. Involucral bracts 1-2, much shorter than the inflorescence, erect or suberect, scarious-margined at the dilated base, up to 3 cm (usually much shorter). Primary rays 0-5, com-pressed, smooth, up to 4 cm. Spikelets solitary, ovate or ovate-lanceolate, terete, acute, densely many-flowered, (6-)10-25 by 4-6 mm; rachilla narrowly winged. Glumes spiral, chartaceous, ap-pressed, broadly ovate, obtuse, mucronulate, scarcely keeled, many-(up to 20-)nerved, fulvous-ferrugineous, 4-6 by 3-4½ mm. Stamens 3; anthers linear, (1½-)2-2½ mm. Style flat, broad, slightly dilated at the base, densely long-ciliate in the upper half, 3-3¾ mm; stigmas 2, shorter than the style. Nut biconvex, obovate, distinctly stipitate (gynophore obconical, ⅓-½ mm), not or hardly umbonulate, smooth, stramineous, (1-)1¼-1½ by ¾-1 mm, obscurely reticulate by the isodiametric epidermal cells.
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Perennials. Rhizomes short. Culms densely tufted, 20-90 cm tall, 1-1.5 mm wide, flatly 3-angled, smooth, striate, with few leaves at base. Leaves shorter than culm; leaf blade 1.5-2 mm wide, stiff, involute, margin apically ciliate. Involucral bract 1, leaflike, much shorter than inflorescence, erect, margin ciliate. Inflorescence a simple anthela, with 3-6 spikelets. Spikelets ovoid to oblong-ovoid, 8-22 × 4-6 mm, terete, many flowered. Glumes spirally imbricate, brown with short rust-colored lines, ovate to broadly ovate, 5-6 × 4-4.5 mm, subleathery, with many veins, abaxial midvein slightly keeled, apex obtuse and mucronate. Stamens 3; anthers linear, 2-2.5 mm. Style ca. 3.5 mm, compressed, ciliate, basally slightly inflated; stigmas 2. Nutlet yellowish brown, stipitate, obovoid, ca. 2 mm, flatly biconvex, slightly shiny and with hexagonal reticulation. Fl. and fr. Jun-Oct.
Open grassy fields, damp heaths, sometimes in teak-forests and rice-fields, usually below 200 m, in Sumba at 500 m, in W. New Guinea up to 540 m.
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