Leaves very densely crowded, strikingly 3-ranked (the rows very prominent and fan-like at the base, the base of the foliage in cross-section therefore Y-shaped), coriaceous, linear, with the midnerve prominent beneath, slightly narrowed towards the conduplicate base, very gradually narrowed into a long, flagelliform, triquetrous, aculeate-scabrous acumen, densely serrate-scabrous throughout the margins and on the midnerve beneath in the upper part. also aculeate-scabrous on the upper surface in the upper part, glaucous, up to 1½ m by 5-20 mm; Inflorescence consisting of a single spikelet, rarely of 2-3 fasciculately arranged spikelets. Flowers about as long as the glumes;
Asia-Tropical: Borneo present, Bukit Kasian present, E. Borneo present, Mt Palimasan present, N. Borneo present, Nunukan present, Sungei magne present, W. Kutei present
Malesia: Borneo (Sungei magne, Bukit Kasian, Nunukan; E. Borneo: W. Kutei, Mt Palimasan; N. Borneo).