Perennials, 10–25 cm tall, densely caespitose; rhizome short, branched. Stems erect, terete, 0.3–0.6 mm thick. Cataphylls 1–2, stramineous to pale brown; leaves ±terete, filiform, to c. 0.7 mm wide, bitubular; basal leaves 2–8 cm long, sometime absent. Cauline leaves 1–2 (–3), 2–20 cm long; leaf sheaths 2–4 cm long; lower cauline leaf often exceeding stem; upper cauline leaf c. 2–3 cm long; auricles membranous to brownish, to c. 1.3 mm long, subobtuse. Bracts lanceolate to ovate, 4–8 mm long, scarious to stramineous; lower bract shorter than flowers. Inflorescence a single terminal (3–) 4–10-flowered pale head. Flowers 6–10 mm long, 0.8–1.5 cm wide; pedicels 2–3 mm long. Tepals subequal, lanceolate, 3–4 mm long, 0.8–1.1 mm wide, ±acute, yellowish white or pale greenish, with a prominent midrib. Stamens 6, exserted, 6–8 mm long; anthers linear-elliptic, white, 1.7–2.3 mm long; filaments 3.5–5.7 mm long; style 0.8–1.3 mm long, thick; stigma 0.5–0.9 mm long. Capsule unilocular, obvoid-trigonous, acuminate, (3.5–) 4.5–6.0 mm long including c. 0.8 mm rostrum, 1–1.3 mm wide, golden brown to pale castaneous, ±exceeding perianth. Seeds oblong, 0.5–0.7 mm long, 0.25–0.3 mm wide, or c. 1.5 mm long including two unequal appendages 0.3–0.6 mm long.