Perennial, tufted. Culms many, rooting from lower nodes, 5–10 cm tall. Leaf sheaths smooth, uppermost reaching lower part of panicle; ligule 1–1.5 mm; leaf blade convolute, 2–3 cm, 1–2 mm wide. Panicle dense, spikelike, 3–5 × ca. 0.5 cm, green; branches single, ca. 1 cm, smooth, spikelets 4 or 5. Spikelets 4–4.5 mm, florets 4; lower glume 1.2–1.5 mm, apex acuminate, upper glume ca. 2 mm, apex acuminate; lemmas 2–2.2 mm, glabrous, apex acuminate; palea keels smooth; anthers 0.8–1.2 mm. Fl. Jul–Aug.
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