Caespitose perennial, usually with short ascending stolons. Culms 14–40 cm high; mid-culm internodes glabrous or minutely scabrous below node, often slightly compressed. Young shoots intravaginal or extravaginal. Leaves: basal sheaths with margins connate for entire length (but soon splitting), glabrous, very thin, strongly reddish-pigmented; ligule 0.8–2.6 mm long, obtuse or truncate, sometimes apiculate, apically glabrous or sparsely ciliolate, abaxially sparsely pubescent; blade channelled to folded with margins usually slightly inrolled, 4–11.5 cm long, 0.2–0.9 mm wide (to 1.3 mm when flattened), soft, thin, prominently nerved, adaxially minutely scabrous, abaxially glabrous, bright green. Panicles rather contracted, 3.5–10 cm long. Spikelets 2.8–6.2 mm long, with 2–7 bisexual florets. Glumes: lower glume 1.5–2.1 mm long, 1 or 3-nerved; upper glume 1.7–2.8 mm long, 3-nerved. Web absent. Lemma 2.3–3 mm long, 5-nerved, shortly puberulous on midnerve and marginal nerves in lower half; intercostal regions glabrous. Anthers 1.1–1.4 mm long.
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