Tufted perennial from a knotty base; culms 10–60 cm. high, hard, erect or geniculately ascending, sometimes decumbent to form hard stolons.. Leaf-blades 3–25 cm. long, 1–4(–8) mm. wide, flat or folded, setaceously acuminate.. Inflorescence 4–20 cm. long; racemes 0.5–3 cm. long, their rhachis triquetrous, 0.2–0.4 mm. wide, glabrous to puberulous.. Spikelets ovate, 1.7–2.6 mm. long; lower glume obtuse or truncate, 1/3–1/2 the length of the spikelet; upper glume 3/4 to as long as the spikelet; lower floret with a palea, its lemma as long as the spikelet, the nerves not raised; upper lemma granulose or weakly rugulose.
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