T: [India] Assam (Khasia), am unteren Brahmaputra, 4.6000 Fuss. J.D.Hooker & J.Thomson; syn: K; Assam, Khasia, 4.5500’, C.B.Clarke; syn: K, several specimens; East Bengal, W.Griffith 5455; syn: K, W.Griffith 5459 p.p.; syn: C, K; Maophlang, 5500’, Khasia, 19 Oct 1872, C.B.Clarke 18687; syn: K.
Perennials, 37–85 cm tall, densely caespitose; rhizome short; stolons absent. Cataphylls 1–2, greenish to brownish, with broad membranous margins. Leaves 2–5, evenly spread out along stem, unitubular, perfectly septate, c. 3–20 cm long, usually 1.0–1.5 mm wide; sheaths slightly inflated; auricles obtuse to acute, 1–2 mm long, membranous or pale brownish. Lower bract stiff, erect, leaf-like, c. 1–4.5 cm long, shorter than inflorescence. Inflorescence densely branched, with 1–3 main branches, of 8–15 (–37) semiglobose to obconical, (2–) 4–10 (–19)-flowered heads on short peduncles; middle bracts stramineous, aristate; capitulum bracts stramineous. Tepals subequal or inner ones longer, ±lanceolate, 2.4–3.0 mm long, pale brown, with distinct membranous margins. Stamens 3; anthers 0.4–0.6 mm long, pale yellow; filaments flattened, c. 1.2–1.7 mm long; style to 0.2 mm long; stigmas spreading, 0.5–1.0 mm long. Capsule unilocular, distinctly trigonous and narrowly oblong-lanceolate in outline, c. 3.8–4.6 mm long including a 0.2–0.5 (–0.7) mm rostrum, castaneous, shining, conspicuously exceeding perianth. Seeds narrowly ellipsoid, apiculate, c. 0.6–0.7 × c. 0.2 mm, pale brown to brown, longitudinally c. 18–24-striate, transversally reticulate; appendages ±absent.