Perennials, 30–95 (–105) cm tall; rhizome horizontal, very short-noded; stems densely crowded. Stem leafless, terete, finely scabrous at least in upper half, ±soft, grey-green, glaucous; ridges 12–28, very prominent; subepidermal sclerenchyma strands present; pith continuous, of astericiform cells. Cataphylls 2–4; upper cataphylls 4–5 (–6) cm long, ±lax to almost tight, with small awn-like blade on uppermost, abaxially dull yellow-brown to stramineous distally, ±dull deep brown to red-brown at base, adaxially silvery stramineous. Lower bract 9–28 (–40) cm long, exceeding inflorescence; sheath narrow. Inflorescence 4–12 cm long, diffuse; flowers numerous, solitary or loosely clustered; branches scabrous. Bracteoles ovate, c. 1 mm long, stramineous or membranous. Tepals lanceolate, often scabrous on midrib, stramineous-brown, occasionally tinged red-brown, with broad membranous margins; outer tepals (1.9–) 2.5–4.5 mm long, acute, longer than or equalling inner ones; inner tepals ±acute to ±mucronate. Stamens (3–) 6, much shorter than perianth; anthers 0.5–0.6 mm long; filaments c. 0.6 mm long; style c. 0.1 mm long; stigmas c. 0.3–0.5 mm long. Style very short; stigmas long. Capsule triseptate, ellipsoid to oblong or ovoid, 3.0–3.5 mm long, shorter than to slightly exceeding perianth, subacute to obtuse, not or shortly mucronate, golden brown. Seeds ovoid, 0.3–0.35 × c. 0.2 mm, apiculate, 13–18-striate, densely reticulate; appendages absent.