Laxly caespitose; stems 30-120 cm, stout. Leaves not very rigid, more or less smooth above, with sclerenchyma-strands all or mostly at the upper surface; old sheaths brown, decaying into fibres; ligule a short rim, with glabrous, clasping auricles. Panicle 10-20 cm; branches aculeolate; lowest node of the panicle with 2 branches, the longer with 4-6, the shorter with 1-3 spikelets. Spikelets (8.5-)11-12(-15) mm, with 5-12 florets. Glumes obtuse, broadly scarious towards the apex, the upper 3.2-7 × 2.4 mm. Lemma (5.3-)6.5-7(-7.5) × 2.5-3 mm. Ovary glabrous.