Rhizome short. Stems tufted, slender to stout, ancipitous, smooth, 50-150 cm by (2-)4-7 mm. Leaves crowded at the base (or a single cauline leaf also present), coriaceous, equitant, ensiform, graduually narrowed upward and shortly acuminate, smooth, (4-)8-20 mm wide. Panicle more or less nodding, oblong, consisting of 4-6 distant fascicles of branches, 20-50 cm long. Bracts erect, shortly laminate, with long, brownish, ancipitous sheaths. Branches more or less drooping, slender, unequal, smooth. Spikelets in numerous clusters, more rarely solitary, ovate to oblong, (1-)2-3-flowered, reddish brown, 3½-5 by c. 2 mm. Glumes 4-6, oblong-ovate, mucronulate, 3-4 mm long; margins sparsely ciliate in the upper half. Bristles absent (very rarely a single vestigial one present). Stamens 3; filaments greatly elongated after anthesis and finally (1-)2-2½ cm long, comose; anthers c. 2 mm, with distinctly produced connective. Nut ellipsoid, triquetrous with somewhat convex sides, slightly rugulose, brownish, c. 2 by ⅔ mm (stipe and beak included); stipe obpyramidal, 3-winged, c. ½ mm; persistent style-base pyramidal, hispid, c. ½ mm long.
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Large lfy clumps. Culms 50–100–(120) cm. × 3–5 mm., smooth, laterally compressed. Lvs 30–150 × 1–2–(3) cm., flat, pale green, tapering to an acuminate tip, margins smooth. Panicle 15–35 cm. long, drooping, much-branched; lowermost sheathing bract with ciliate mouth and lamina up to 3 cm long; branches in fascicles from upper sheaths. Spikelets , 3–4 mm. long in small fascicles towards the tips of the branchlets, red-brown, 2–3–(4)-fld, us. lowest 1–2 fls fertile. Glumes 5–7, ovate-lanceolate, acuminate to almost awned, scabrid-pubescent, lower 2–3 sterile. Hypog. bristles 0. Stamens elongating after flowering, filaments bright red-brown. Nut, including beak, 2–2.5 mm. long, < 1 mm. wide, acutely trigonous, almost alate, fusiform, brown, narrowed above and below to a 3-angled beak and stipe each c. = body of nut in length.
Open hillsides, moist mountain slopes, also in forests, 500-2000 m.
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It grows on open hillsides and mountain slopes.
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