Loosely tufted. Rhizome extremely short. Stems erect, trigonous, 2-3 cm tall, 0.5-1 mm thick, smooth. Leaves sheathing and clothing all the stem, up to rather more than twice its length, 1.5-3 mm wide, flat to somewhat folded. Spikes 3 or 4, all densely crowded at the apex of the stem, terminal usually male, sometimes female, about 4-7 mm long, when male slenderly (1-1.5 mm.) cylindric, lateral spikes widely or rather widely spreading, female, more or less globose, 5-7 mm long, 4-6 mm thick, subdense-flowered, subsessile or scarcely to shortly exserted-peduncled. Bracts of the lateral spikes foliaceous or sub-foliaceous, slightly to much exceeding the inflorescence, shortly sheathing. Female glumes ovate, oblong-ovate, or ovate-lanceolate, flattish to cymbiform, apex very obtuse to truncate-rounded, 2.5-3 mm long, 1.2-1.6 mm wide, pale or pale greenish below and rich castaneous above except for a greenish stripe along the midrib area, midrib not excurrent. Utricles not quite mature, ellipsoid but tapering at each end, especially above, compressed-trigonous, 4-5 mm long, 1.25-1.5 mm broad, membranaceous, strongly and rather closely nerved on each face, narrowly marginate, glabrous, straightish, not widely spreading, pale below, green above, not stipitate; beak tapering below, compressed, 1.25-1.5 mm long, narrowly marginate, glabrous, straight, green, shortly bidentate; teeth straight. Achene not fully developed, obovoid, trigonous, 1.25-1.5 mm long, about 1 mm broad, shortly and slenderly beaked.
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Perennial herb, tufted, 0.02-0.06 m high. Leaf blades up to 65-100 x 2.2-3.0 mm, flat or keeled, glabrous. Culm cryptic, 3-angled, 0.5-1.0 mm in diam. Inflorescence a raceme of spikes, 12-20 mm long. Bracts 1 at each node, leaf-like. Spikes 3 or 4, spreading, clustered, the largest 7-9 x 7-9 mm; apical spike staminate, lowest 2-or 3-pistillate. Pistillate bracts (glumes) shorter and narrower than perigynium, lanceolate, 2.5-3.0 x 1.2 mm, keel terminating subapically, sometimes excurrent into minute scabrid awn. Perigynium suberect to spreading, 4.0-4.5 mm x 1.2-1.5 mm, elliptic or rotund in cross section, much inflated, bright yellow, glabrous, nervose; rostrum 1.2-1.8 mm long with shallowly bidentate apex. Flowering time Jan. Nutlet obovate, 1.5-1.8 x 1.0 mm, dark brown, surface minutely papillose.