Perennials, 25–60 cm tall. Rhizomes stoloniferous, 1 mm diam, with swollen nodes. Cataphylls 1–2 or absent, stramineous, rounded; basal leaves 1 or absent, 5.5–20 cm long. Cauline leaves 3–5, 5.5–20 cm long, terete, septate, unitubular; tip acuminate; auricles 1.5–2.5 mm, rounded to acute, scarious. Lower bract leaf-like, terete, 3.4–7 cm long, equalling or exceeding inflorescence, erect or spreading; other bracts green, lanceolate, 4–9 mm long. Inflorescence panicles of 2–16 heads, 2.5–6 cm tall, with ascending, spreading or reflexed branches; heads spherical, 10–40-flowered, 11–15 mm in diam. Tepals unequal, lanceolate-subulate, green or stramineous to reddish brown, acuminate; inner tepals 3.9–5.4 mm long; outer tepals (3.5–) 4–4.9 mm long. Stamens 6, not exserted; anthers 1.1–1.4 mm long; filaments 0.4–0.8 mm long; style absent; stigmas 1.3–1.5 mm long. Capsules unilocular, lanceolate in outline, tapering, 5.2–6.5 (–8) mm long, castaneous-brown, much exceeding perianth. Seeds 0.4–0.5 × 0.2–0.3 mm; appendages absent.