Vegetative parts: plants tufted, 0.2–0.6 m tall, basal diameter 0.05–0.2 m, crown diameter 0.3–0.5 m, compact, without spreading rhizomes or stolons. Fertile culms unbranched or sparingly branched, round (not compressed), solid or with a small central cavity, smooth, green, 0.2–0.6 m tall, diameter at base 1–1.5 mm, diameter at apex 0.8–1.2 mm. Sheaths persistent, with no abscission line, closely convoluted, 20–30 mm long, initially pale brown, later grey, apical margins narrowly membranous or broadly chartaceous and soon decaying, hyaline shoulders membranous margins continuing behind awn, hyaline shoulder 0.1 of sheath body length, apex, excluding the membranous lobes, acute. Sheath-mucro hair-like, straight and erect, 4–5 mm long, Sheaths initially with defined membranous margins, these soon decaying leaving sheaths with a grey, frayed margin. Males: male inflorescence with 2–5 spikelets or 6–10 spikelets or 11–20 spikelets, globose (forming button-like heads, and innovating a second year's spikelets within the head), 10–14 mm long, 10–20 mm wide. Male inflorescence spathes persistent, shorter than spikelets, chartaceous, often forming an involucre below the inflorescence. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, oblong, apex acute, 5–9 mm, 2–2.5 mm, with 5–7 flowers, pedicels absent ie spikelets sessile. Male bracts taller than flowers, 5–6 mm long, oblong or ovate, acuminate, chartaceous, bract upper margin like body of bract, bract awn minute or absent or less than half as long as the bract body. Male flower 3.5–5 mm long. Male tepals sepals and petals the same rigidity, chartaceous or membranous, oblong, inner and outer tepals the same length. Male outer lateral tepals conduplicate, keel sparsely villous. Anthers 1.5–2.2 mm long, exserted from the flowers. Pistillode present. Females: female inflorescence globose, 15–25 mm long, 7–20 mm wide, with 2–5 spikelets. Female spathes as long as the spikelets, persistent, chartaceous or cartilaginous. Female spikelet sessile, elliptical, apex acute, 10–23 mm long, with 6–10 flowers, with 4–8 sterile bracts. Female bracts taller than flowers, erect or reflexed, 7–12 mm long, ovate, acuminate, cartilaginous, apical margin like rest of bract (very narrow membranous margins), same as body of bract, awn minute or absent or less than half as long as the bract body. Female flower 6.5–8 mm long, without a fleshy pedicel. Female tepals bony, keels of lateral sepals densely villous or both lateral sepal keels and odd sepal villous, apices acuminate, inner and outer whorls the same length. Female outer lateral tepals conduplicate, hidden by bracts, or bracts are shorter than flowers, 6–8 mm long. Female odd outer tepal ovate, 5.5–7.5 mm long. Female inner tepals ovate, 5.5–6.5 mm long. Staminodes absent. Styles feathery, 2. Style bases fused to form a pillar. Ovary with 2 locules, dehiscent. Fruit: seed (1.8–)1.83(–1.88) mm long, (1.12–)1.17(–1.2) mm in diameter, shape in side view elliptical, shape in diameter plano-convex in cross section, brown.