T: Sikkim, 3200–4500 m, J.D.Hooker & J.J.Thomson Juncus 11; syn: K, LD, S, W.
Perennials, with stout creeping rhizomes. Stems stiffly erect, 20–73 cm tall. Basal leaves 1–2 (–4), to 30 cm long. Cauline leaves up to 3 near base and sometimes 1 on upper part; blade to 32 cm long, 0.8–2.2 mm wide, semi- to subcylindrical, ±canaliculate above, unitubular, septate; septa nearly always visible externally; auricles conspicuous, obtuse, with free part c. 3 mm long, pale brown, membranous. Lower bract erect, leaf-like, usually exceeding inflorescence. Inflorescence terminal, branched, of 2–7 (–13) hemispheric 7–12 (–16)-flowered capitula 1.2–1.8 cm diameter; capitula 1–2 subsessile, others on thick stiff peduncles up to 3 (–5) cm long. Tepals lanceolate, acute; outer tepals 4.8–6.5 mm long, usually shorter than inner ones (5.3–6.7 mm long), whitish or pale stramineous. Stamens 6, partly to completely exserted; anthers linear, 2.4–3.5 mm long, cream; filaments 4–6 mm long; ovary ellipsoid, 2.1–3.6 mm long, gradually tapered into style 2.1–3.6 mm long; stigmas stout, twisted, 1.0–1.6 mm long. Capsule broadly ellipsoid-trigonous, sometimes slightly curved, orange-brown, (4.0–) 4.4–6.2 mm long; mucro 0.3–1.8 mm long. Seeds 0.5–0.7 mm long, or 2.0–2.5 mm long including two subequal appendages.