Perennials, 15–45 cm tall, caespitose; rhizome creeping, 2–3 mm in diam., with filamentous cover of remains of old cataphylls; internodes short; stems in dense rows, ±canaliculate, erect, 0.5–1.5 (–2.0) mm in diam. Cataphylls 3–4 per stem, to 5 cm long, dark brown; upper cataphylls sometimes stramineous-brown. Leaves basal, 1–2 per stem, 10–35 cm long, filiform, 0.6–1.0 mm in diam., canaliculate and obtuse-angled; sheaths 1.5–6 cm long; margins scarious; auricles cartilaginous, 0.3–0.5 mm long. Lower bract leaf-like, to 8 cm long, exceeding inflorescence. Inflorescence compound, 1–30-flowered, of (1–) 2–4 clustered unilateral cymes. Bracteoles 1.5–2.0 mm long. Tepals unequal, lanceolate, acute; midrib green turning castaneous; margins castaneous, later scarious; outer tepals 3.5–5 mm long; inner tepals 3–4 mm long. Stamens 6, 1.7–2.1 mm long; anthers 0.8–1.0 mm long; filaments c. 1.0–1.2 mm long; style c. 0.1–0.2 mm long; stigmas c. 0.4–0.8 mm long. Capsule triseptate, ellipsoid-trigonous, gradually narrowing into obtuse to truncate apical part with sides slightly concave, 3.5–5.0 × 1.8–2.5 mm, ±exceeding perianth, castaneous, glossy, thick-walled. Seeds broadly obliquely ovoid, apiculate, brown, rugose, 0.4–0.6 × 0.2–0.3 mm; appendages absent.