Vegetative parts: plants clumped, 0.5–1 m tall, basal diameter 0.5–2 m, crown diameter 1–2.5 m, with rhizomes. Rhizome very short with culms aggregated at base, 3.5–5 mm in diam., culms 2–10 mm apart. Fertile culms unbranched, round (not compressed), solid or with a small central cavity, smooth or finely rugulose, olivaceous, 0.5–1 m tall, diameter at base 1.3–2.3 mm, diameter at apex 0.8–2 mm. Clusters of sterile branches at the nodes of the fertile branches absent. Sheaths more than 1 per culm, dropping off, with an abscission line present, loosely convoluted or flat and standing free from culm, 20–30 mm long, margins entire, pale brown, upper 1/3 in colour and texture similar to the lower 2/3, apical margins coriaceous, like the rest of the body, hyaline shoulders absent, apex, excluding the membranous lobes, acute or obtuse or rounded. Sheath-mucro absent or penicellate, straight and erect, 1–5 mm long. Males: male inflorescence with 11–20 spikelets or 21–50 spikelets, paniculate, 60–160 mm long, 10–20 mm wide. Male inflorescence spathes caducous, taller than spikelets, chartaceous, 30–50 mm long. Male spathellae inconspicuous or absent. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, oblong, apex obtuse or undifferentiated, 7–12 mm, 4–6 mm, with 5–10 flowers, pedicels shorter than the spikelets, terete or angular. Male bracts more than twice as tall as flowers, 7–15 mm long, linear, acuminate, margins deeply lacerated or toothed, membranous, bract upper margin like body of bract, bract awn minute or absent, Bracts long, linear, long lacerated from the base. Male flower 3–3.7 mm long. Male tepals sepals and petals the same rigidity, cartilaginous, oblong or ovate, inner tepals longer than outer tepals. Male outer lateral tepals as other tepals, glabrous. Anthers 1.5–1.7 mm long, included in the flowers. Pistillode present. Females: female inflorescence linear, 40–100 mm long, 12–25 mm wide, with 2–5 spikelets or 6–10 spikelets or 11–20 spikelets. Female spathes longer than the spikelets, not obscuring spikelet or obscuring spikelet, persistent, chartaceous. Female spathellae inconspicuous or absent. Female spikelet pedicel simple, with 1 flowers, with 0 sterile bracts. Female bracts taller than flowers, erect, 10–15 mm long, linear or ovate, acuminate, membranous, apical margin like rest of bract, paler than body of bract, margins deeply lacerated or toothed, awn minute or absent. Female flower 6–8.4 mm long, without a fleshy pedicel, six tepals. Female tepals bony or coriaceous or cartilaginous, glabrous and smooth, midrib flush with the tepal body, margins entire, apices acuminate, inner and outer whorls the same length. Female outer lateral tepals like other tepals, hidden by bracts, or bracts are shorter than flowers, 6–8.5 mm long. Female odd outer tepal ovate, 6–8.5 mm long. Female inner tepals ovate, 6–7.7 mm long. Staminodes present. Styles feathery, 3. Style bases free. Ovary with 3 locules, dehiscent. Fruit: seed (1.72–)2.13(–2.52) mm long, (1.2–)1.44(–1.6) mm in diameter, shape in side view oblong, shape in diameter round in cross section, brown.