Plant densely tufted; shoots intravaginal. Culms 20–35(–50) cm tall, nodes 1(–2). Leaf sheaths glabrous or basal leaf sheaths occasionally with trichomes; auricles present as erect swellings; leaf blades filiform, green or bluish, conduplicate, (2–)6–15(–20) cm × 0.3–1.1 mm, veins (3–)5(–7); adaxial to abaxial sclerenchyma strands absent, abaxial sclerenchyma in 3(–5) discrete strands; ligule 0.1–0.3 mm, margin ciliate. Panicle spikelike, 3–7 cm; branches 1–2.5 cm, scabrid, 1 at lowest node. Spikelets 4.5–6 mm, greenish brown or purplish; florets (2–)3–5; glumes sometimes with ciliolate margins; lower glume lanceolate, 2–2.6(–3.5) mm; upper glume broadly lanceolate, 3–4.2 mm; rachilla internodes 0.4–0.8(–1.2) mm; lemmas 3.8–5 mm, scabrid; awns 0.7–2.2 mm; palea keels scabrid. Anthers (1–)1.6–2.4 mm. Ovary apex glabrous. Fl. and fr. May–Aug.
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