Plant loosely or densely tufted; shoots intravaginal. Culms 4–45 cm tall, nodes 1–3. Leaf sheaths glabrous or pubescent; auricles acute erect swellings or absent; leaf blades conduplicate, (1.5–)5–10(–14) cm × 0.2–0.4 mm, 0.5–0.8 mm deep, veins 5–7(–9); adaxial to abaxial sclerenchyma strands absent, abaxial sclerenchyma in 3 narrow discrete strands; ligule 0.1–0.4 mm, margin ciliolate. Panicle contracted to spikelike, 2–10 cm; branches stiffly ascending to erect, 1 at lowest node. Spikelets 5–10 mm, greenish, brownish or purplish; florets 2–6; glumes often ciliolate on margins; lower glume narrowly lanceolate; upper glume lanceolate to broadly lanceolate; lemmas 3.2–6 mm, scabrid; awns 0.8–3 mm; palea keels scaberulous or scabrid. Anthers (0.8–)1–3 mm. Ovary apex glabrous. Fl. and fr. May–Sep.
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