Perennial, loosely tufted, grayish green. Culms 15–60 cm tall, 1–2 mm in diam. Ligule 1–1.5 mm; leaf blades flat or conduplicate, 2–6 cm, 1–2 mm wide, margins and adaxial surface scabrid. Panicle open, 6–20 cm; branches 3–8 cm, horizontally spreading or reflexed, scabrid. Spikelets 4–5 mm, florets 5–8; glumes ovate, lower glume 0.7–1 mm, upper glume 1.2–1.5 mm; lemmas 1.6–1.8 mm, green, rarely purply tinged, base pubescent, apex broadly obtuse; palea keels ciliate-scabrid; anthers 0.3–0.5 mm, Fl. Jun–Jul. 2n = 28.
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