Perennials, c. 1–6 cm tall, slender, caespitose to mat-forming; rhizome creeping-ascending, distally branched, thin, pale brownish, gradually changing into stem with ascending base. Leaves basal and cauline, 2–5, filiform, striate, terete, unitubular, perfectly septate, with septa scarcely visible externally, usually exceeding stem, 0.3–0.5 mm in diam.; sheaths conspicuous, usually stramineous, loose, with broad membranous or stramineous margins, distinctly veined; auricles scarious to stramineous, ±obtuse, c. 0.3–0.5 mm long. Lower bract often sheath-like with a short blade or ±leaf-like, 3–7 (–15) mm long, usually exceeding inflorescence, often greatly so. Inflorescence terminal, few-flowered, usually of a single 1–3 (–4)-flowered head. Tepals subequal; inner tepals often longer, often obtuse or slightly auriculate, 1.5–2.3 mm long, ±ovate-lanceolate; outer tepals subobtuse, greenish to stramineous, later castaneous, distinctly veined; margins membranous. Stamens 6, ±equalling tepals; anthers 0.4–0.7 mm long; filaments c. 1.3–1.8 mm long; style 0.3–0.5 mm long; stigmas 0.6–1.5 mm long. Capsule unilocular, narrowly ovoid to ellipsoid, subabruptly acuminate, to subobtuse, mucronate, c. 1.8–2.5 mm long, brown to castaneous-brown, usually slightly longer than perianth. Seeds ±ovoid, c. 0.4–0.5 × 0.25–0.3 mm, pale brown, distinctly reticulate; appendages absent.