Vegetative parts: plants tufted, 0.15–0.5 m tall, basal diameter 0.01–0.05 m, crown diameter 0.1–0.3 m, compact, without spreading rhizomes or stolons. Fertile culms sparingly branched or branching, smooth or finely rugulose or finely warty, olivaceous, 0.15–0.5 m tall, diameter at base 0.3–1.3 mm, diameter at apex 0.4–1 mm. Sheaths closely convoluted, 15–30 mm long, brown, apical margins narrowly membranous, hyaline shoulders membranous margins continuing behind awn, hyaline shoulder 0.05 of sheath body length, apex, excluding the membranous lobes, acute. Sheath-mucro penicellate, straight and erect, 5–10 mm long, rather striking with long awns. Males: male inflorescence with 1 spikelet or 2–5 spikelets or 6–10 spikelets, racemose or paniculate, 20–100 mm long, 5–15 mm wide. Male inflorescence spathes persistent, like the floral bracts or shorter than spikelets, coriaceous, slightly darker than the bracts, with a longer awn. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, oblong or elliptical, apex acute, 12–20 mm, 3–7 mm, with 4–9 flowers, pedicels absent ie spikelets sessile or shorter than the spikelets, terete or angular. Male bracts more than twice as tall as flowers, 7–12 mm long, oblong, acute, cartilaginous, bract upper margin like body of bract (or narrowly darker), bract awn less than half as long as the bract body. Male flower 2.5–3.5 mm long. Male tepals sepals more rigid than petals, chartaceous, petals membranous, linear, inner tepals shorter than outer tepals. Male outer lateral tepals keeled or winged, glabrous. Anthers 1.5–2 mm long, exserted from the flowers. Pistillode present. Females: female inflorescence sparsely paniculate or racemose, 20–70 mm long, 5–15 mm wide, with 1 spikelet or 2–5 spikelets. Female spathes shorter than the spikelets (very similar to bracts), persistent, coriaceous. Female spikelet sessile or pedicel simple, oblong, apex truncate, 15–35 mm long, with 4–7 flowers, with 1 sterile bracts. Female bracts at least twice as long as flowers, 7–17 mm long, oblong, acute, cartilaginous, apical margin like rest of bract, same as body of bract, awn minute or absent or less than half as long as the bract body. Female flower 2.5–3.8 mm long, oblique, without a fleshy pedicel. Female tepals chartaceous, keels of lateral sepals densely villous, midrib flush with the tepal body, apices acute, inner and outer whorls the same length. Female outer lateral tepals conduplicate, 2.5–3.5 mm long. Female odd outer tepal oblong, 2.5–3.5 mm long. Female inner tepals oblong, 2.5–3.5 mm long. Staminodes present. Styles feathery, white, 3. Style bases free. Ovary with 1 locule, dehiscent. Fruit: seed (1.4–)1.68(–1.88) mm long, (0.64–)0.87(–1.04) mm in diameter, shape in side view elliptical, shape in diameter elliptical in cross section, yellow, smooth (shiny).