Perennials, 40–140 cm tall; rhizome stout, creeping, covered with castaneous to dark scales; stems in dense rows. Stem leafless, terete, 1.5–4.5 mm diam., ±soft, yellow-green; ridges prominent, 30–65; dorsal cells not enlarged; pith continuous, of perfectly astericiform cells. Cataphylls few, c. 2–4, distally ±lax, abaxially pale stramineous to pale yellow-brown distally, dull deep yellow-brown to brown and ±dull at base, adaxially silvery stramineous. Lower bract erect, 11–40 cm long, exceeding inflorescence; sheath not inflated, only slightly dilated. Inflorescence 7–17 cm long, diffuse; flowers numerous, of 5–15 dense glomerules densely clustered in 1–5 groups on thick peduncles (to 1 mm in diam.). Outer tepals 2.5–3.2 mm long, lanceolate, acute to acuminate, with ±narrow membranous margins, longer than or equalling inner ones; inner tepals broader, ±broadly acute, with broad membranous margins, all stramineous-brown, often tinged red-brown. Stamens 6; anthers 0.7–0.9 mm long; filaments c. 0.6 mm long; style c. 0.1 mm long; stigmas to 0.5 mm long. Capsule slightly triseptate (unilocular), oblong-ovoid, 2.8–3.3 mm long, obtuse to subacute, shorter than to slightly exceeding perianth, not or shortly mucronate, golden brown. Seeds pale brown, narrowly ovoid, c. 0.5 × 0.2–0.25 mm, apiculate, longitudinally c. 16–22-striate, densely transversely reticulate; appendages absent.