Caespitose 15-90 cm, forming small tufts, with short stolons. Stem sharply trigonous above, edges scabrous. Leaves soft, from c. ½ to as long as stem; sheaths 15-40 mm, whitish to grey-brown or reddish, margin of scarious side concave or straight; ligule 0.1-0.2 mm, arch as high as wide or higher; blades 2-3.5 mm wide, flat, wrinkled along main veins, adaxial side smooth or +/- papillose, basal baxial side smooth , margins, apex and mid-vein scabrous. Inflorescence 30-70 mm, of 3-8(-15) androgynous spikes, overlapping or a few lowest distant, lowest branch sometimes elongate and with several spikes. Bracts sheathless, glume-like or at most as long as their spike, very narrow, green, scabrous. Spikes globular, 5-7 mm diam., green, later light brown; glumes 2.5-4.6 x 1.3-2.5 mm, ovate, obtuse to acute or frequently with mucro up to 0.5 mm, mid-vein white, surrounded by green area, bordered by two, white, conspicuous veins, margins scarious; utricles 3.3-5.4 x 1.5 mm, plano-convex, narrowly ovoid, narrowly winged. brownish, adaxial side without veins, glossy, baxial side without or with few veins, sometimes with short stipe 0.2-0.3 mm, beak green, winged, 1-2.3 mm, with two long, sharp teeth, ostiole white-margined. Nut 1.7-2.7 x 1.4-1.9 mm, bi-convex or planoconvex, widely ovoid to ellipsoid, glossy, finely verrucose.