Perennials, (50–) 75–150 cm tall; rhizome creeping, branched, to 10 mm in diam., with internode length variable. Culms rigid, usually 2–5 mm thick. Leaves 25–110 cm long, 1.5–3 mm thick. Lower two bracts leaf-like, 5–25 cm long, including a sheath 2–5 cm long, shorter than to much exceeding the inflorescence; middle bracts small; bracts subtending heads much shorter than flowers, ovate, amplexicaul, cuspidate. Inflorescence 5–40 × 2–5 cm, lax, usually elongated, with (20–) 50–150 (–300) heads. Heads (1–) 2–4 (–6)-flowered. Tepals 3.5–5 mm long, equal or outer ones ±longer; margins broad, scarious; outer tepals narrowly ovate, cymbiform, acute to obtuse, sometimes with small mucro; inner tepals oblong, obtuse, with margins ±expanded apically. Stamens 6, 2/3–3/4 as long as tepals; anthers (1.0–) 1.5–2.0 (–2.5) mm long, 3–6 times as long as filaments; style 0.7–1.2 mm long; stigmas 1–1.5 mm long. Capsule 3.5–5 mm long, conspicuously exceeding or rarely equalling tepals, narrowly trigono-ovoid, trilocular, usually straw-brown; apex trigonous, tapering, sometimes abruptly contracted; mucro to 0.5 mm; seeds usually 70–90. Seeds 0.6–0.7 mm long, or 0.9–1.8 mm long including appendages, 0.2–0.3 mm broad, narrowly obliquely ovoid, 20–25-striate; appendages equal or subequal. 2n = 46, 48, fide S.Snogerup, Willdenowia 23: 57 (1993).