Perennial, 10–30 (–55) cm tall; rhizome creeping, sparsely branched with short or up to 1 cm long internodes. Stem leafless, terete, 1.5–2.5 mm thick, stiff, smooth, inconspicuously 30–40-striate when dry, lacking subepidermal sclerenchyma strands; epidermis cells uniform; vascular bundles ±in three rows; pith initially of rounded imperfectly astericiform cells, later irregular, arachnoid. Cataphylls 3–4; upper cataphylls 3–6 (–9) cm, with no or very small blade, stramineous to light castaneous. Inflorescence pseudolateral, dense, (2–) 3–10-flowered, lower bract 3–5 cm long, much exceeding the inflorescence, 1/10–1/4 as long as stem. Bracteoles 2.5–3.5 mm long, ±unequal, broadly ovate, obtuse to mucronate or acute, whitish membranous above, brown at base. Outer tepals (3.5–) 4.5–6 mm long, slightly longer than inner ones, lanceolate, acute to shortly apiculate; inner tepals oblong, obtuse to emarginate or obtuse with short mucro, all dark brown with greenish central band and broad scarious margin in upper part. Stamens 6; anthers 0.4–1.5 mm long, 1/3 as long as or equalling filaments. Style to 0.5 mm long; stigmas 1 mm long. Capsule unilocular, triseptate, 3.2–5 mm long, ±equalling or exceeding perianth, trigono-ovoid to trigono-ellipsoid, obtuse with 0.2–0.3 mm mucro, dark brown to castaneous. Seeds 0.6–1.1 × 0.3–0.5 mm, more or less obliquely ovoid, inconspicuously reticulate, dark brown, appendages ±absent.