T: India, secus rivulos in sylvis montosis trans Kionbrong Ghauti, 5000–5300 m; syn: P, K [herb. Gay]; J.Descaisne, in V.Jacquemont, Voy. Inde 4: Tab. 172 (1844); syn.
Perennials, 14–66 cm tall, stout, loosely caespitose; rhizomes relatively stout, creeping, long. Cataphyll 0–1, rarely more. Cauline leaves 2–3; blade semi-cylindric with large central hollow, weakly septate (septa not visible externally), 5–13 cm long, 1.0–2.3 mm wide, canaliculate; margins not serrulate; tip obtuse, often dark-coloured; sheaths loose, usually pale; auricles conspicuous, pointed, free part to 3 mm long, often brownish. Lower bract leaf-like, overtopping inflorescence; base inflated, spathe-like. Inflorescence terminal; capitula (2–) 3 (–4), 3–6-flowered, finally distant. Flowers long-pedicelled (to 4 mm). Tepals narrowly lanceolate, with finely acuminate to almost filiform apex, subequal or outer (6.5–11.0 (–13.0) mm) longer and wider than inner (6.3–9.7 (–13.0) mm), dark reddish-brown or castaneous with paler tips and inner with paler margins, becoming blackish. Stamens 6, shorter than tepals; anthers (0.9–) 1.4–2.5 mm long, shorter than 2.5–4.4 mm long filaments; ovary ellipsoid, abruptly contracted into short style, 1.0–2.2 mm long; stigmas 2.0–3.7 mm long. Capsule narrowly oblong- to narrowly ellipsoid-trigonous, ±shorter than tepals, 4.8–7.5 (–9) mm long, abruptly contracted into short beak. Seeds 0.6–0.7 (–1.0) mm long, or 2.8–4.0 mm long including two thin long, ±equal appendages.