Perennial, (30–) 40–60 (–100) cm tall, densely caespitose; rhizome very short-noded. Stem leafless, terete, usually 1–2 mm thick, light green; ridges c. 20–30, conspicuous when dry; subepidermal sclerenchyma strands present; epidermis cells uniform; pith continuous, of astericiform cells. Cataphylls 3–4; upper cataphylls (4–) 10–15 (–20) cm long, with small awnlike blade, lax, pale brown to greenish above, reddish-brown and often shining and slightly scabrid at base. Inflorescence pseudolateral, 1–3 (–5) cm long, dense to loose; flowers numerous, solitary or loosely clustered. Lower bract (5–) 7–15 (–35) cm long, considerably exceeding inflorescence; sheath constricted below the inflorescence. Bracteoles ovate, c. 1.0–1.5 mm long, pale castaneous to scarious. Tepals 2–3 mm long; outer tepals usually slightly longer than inner ones, acuminate; inner tepals acute, all dark brown or deep castaneous-brown with greenish central band and narrow scarious margin. Stamens 3; anthers 0.5–0.7 mm long; filaments 0.5–0.6 mm long; style c. 0.1 mm long; stigmas 0.5–1.0 mm long. Capsule triseptate, 2–2.5 mm long, shorter than or about equalling tepals, trigonous oblong-obovoid to trigonous-oblong, slightly exceeding perianth, c. 2.0–2.7 mm long, obtuse or slightly retuse, shortly mucronate, dark olive-brown or castaneous-brown at apex. Seeds pale brown, 0.4–0.5 × c. 0.2 mm, obliquely obovoid, reticulate; appendages absent.