Caespitose. Culms to 100 cm high. Leaves: ligule 2–5 mm long; blade to 20 cm long, 1.5–5 mm wide, adaxially glabrous or scabrous, abaxially glabrous. Panicles to 25 cm long; primary branches paired, appressed. Spikelets 8–15 mm long, with 2–6 cleistogamous bisexual florets; pedicel to 30 mm long. Glumes unequal; lower glume 3.6–5.3 mm long, 3–5-nerved; upper glume 4.7–7.3 mm long, 5–7-nerved. Lowest lemma 5.6–7.5 mm long, swollen, 4-toothed, 7-nerved, with nerves dark-coloured near apex, papillose; 2 central teeth 0.3–0.65 mm long and outer teeth shorter; awn arising 25–45% of lemma length below tip, 9–16 mm long, geniculate, with column twisted. Palea acute. Caryopsis 1.6–2.1 mm long.
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