Perennials, 20–60 cm tall; rhizome creeping, sparsely branched, with internodes of variable length. Cataphylls 0–2. Cauline leaves 3–5, unitubular, perfectly septate, 5–25 cm long, c. 1–2 mm in diam.; sheaths with distinct margins usually c. 1 mm wide; auricles subcoriaceous, obtuse scarious to brownish, c. 0.5–1.5 mm long. Lower bract usually short, sheath-like, with an awn-like blade, rarely leaf-like, much shorter than inflorescence. Inflorescence decompound, often divided in two discrete parts, of (25–) 50–80 semiglobose to obconical, (2–) 3–4 (–8)-flowered ±evenly spaced heads; primary branches ±erect; secondary branches erecto-patent. Tepals ±equal, ovate to oblong-ovate, 2.0–2.7 mm long; outer tepals ±acute, shortly mucronate; inner tepals broadly obtuse, usually dark brown to deep castaneous, with margins broad and scarious. Stamens 6; anthers 0.7–1 mm long; filaments 0.7–0.9 mm long; style 0.5–0.8 mm long; stigmas 1.0–1.5 mm long. Capsule unilocular, broadly ovoid-trigonous, usually subabruptly narrowing into a 0.3–0.5 mm mucro, 2.4–3.2 mm long, dark brown to deep castaneous, slightly exceeding perianth. Seeds ovoid-ellipsoid, c. 0.5–0.6 × 0.2–0.25 mm, apiculate, pale brown, longitudinally c. 25-striate, finely transversely reticulate; appendages absent. 2n = 40, fide S.Snogerup, in Ö.Nilsson & S.Snogerup, Bot. Not. 125: 132 (1972); M.Zandee, Proc. Kon. Ned. Akad. Wetensch., C, 84: 250 (1981). Fig. 108.