Vegetative parts: plants clumped, 1–2.3 m tall, basal diameter 1–3 m, crown diameter 1–3 m, with rhizomes. Rhizome very short with culms aggregated at base or spreading, unbranched or sparsely branched, culms evenly spaced, 5–8 mm in diam., culms 20–30 mm apart. Fertile culms unbranched, round (not compressed), solid or with a small central cavity, smooth or finely rugulose, olivaceous, 1–2.3 m tall, diameter at base 4–7 mm, diameter at apex 1.5–3 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, 40–55 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. Sheaths are very poorly known, no herbarium specimens seen were young enough for good sheath retention. Males: male inflorescence with 21–50 spikelets or 50–100 spikelets, paniculate, 70–230 mm long, 15–35 mm wide. Male inflorescence spathes persistent, taller than spikelets, chartaceous, Strikingly golden-brown. Male spathellae inconspicuous or absent. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, oblong or ovate, apex obtuse or acute or undifferentiated, 8–18 mm, 5–10 mm, with 8–40 flowers, pedicels absent ie spikelets sessile or shorter than the spikelets, terete or angular. Male bracts more than twice as tall as flowers, 8–15 mm long, linear or ovate, acuminate, margins entire, chartaceous or membranous, bract upper margin membranous, thinner texture than the body, bract awn minute or absent, Bracts very pale, largely membranous, becoming lacerated with age. Male flower 4–5 mm long. Male tepals sepals and petals the same rigidity, cartilaginous, oblong or ovate, inner tepals longer than outer tepals. Male outer lateral tepals keeled or winged, glabrous. Anthers 2.3–3 mm long, included in the flowers. Pistillode present. Females: female inflorescence linear, 70–260 mm long, 20–30 mm wide, with 11–20 spikelets or 21–50 spikelets. Female spathes longer than the spikelets, obscuring spikelet, persistent, chartaceous. Female spathellae inconspicuous or absent. Female spikelet sessile or pedicel simple, oblong or elliptical or ovate or orbicular or undifferentiated, apex acute or undifferentiated, 8–15 mm long, with 10–20 flowers, with 0 sterile bracts. Female bracts taller than flowers, erect, 9–15 mm long, linear or ovate, acuminate, chartaceous or membranous, apical margin membranous, paler than body of bract, margins entire, awn minute or absent. Female flower 6–7 mm long, without a fleshy pedicel, six tepals. Female tepals coriaceous or chartaceous, glabrous and smooth, midrib flush with the tepal body, margins entire, apices acute or acuminate, inner whorl longer than outer. Female outer lateral tepals conduplicate, hidden by bracts, or bracts are shorter than flowers, 4.5–5 mm long. Female odd outer tepal oblong or ovate, 5 mm long. Female inner tepals oblong, 5.5–6 mm long. Staminodes present. Styles feathery, 3. Style bases free. Ovary with 1 locule (lines of dehiscence between 3 original carpels can be clearly seen and are equal but ovary is unilocular with 1 seed inside), dehiscent or capsules thinwalled, sometimes dropping with seed in. Fruit: seed (1.44–)1.68(–1.88) mm long, (0.96–)1.05(–1.32) mm in diameter, shape in side view elliptical, shape in diameter round in cross section, brown.