Perennials, erect, caespitose. Flowering culms 14–140 cm high. Leaves: basal leaf sheath margins glabrous; ligule a ciliate membrane, to 0.5 mm long; blade flat or folded or convolute, linear, 7–45 cm long, 2–3 mm wide, with smooth margins. Inflorescences of spicate main branches, irregular, contracted and spiciform, 18–60 cm long; primary branches solitary, shorter than adjacent internodes, erect, spreading or appressed at apex of inflorescence, spikelet-bearing throughout, with spikelets in clusters. Spikelets shortly pedicellate, 1.25–1.75 mm long; pedicel to 0.5 mm long. Glumes: lower glume elliptic, 0.4–1 mm long, obtuse (often torn), 0–1-nerved; upper glume lanceolate, at least half spikelet length, 0.6–1.2 mm long. Lemma lanceolate, 1.2–1.75 mm long, acute, 1-nerved. Palea slightly shorter than lemma, entire. Anthers 2, to 0.5 mm long. Grain obovate, quadrangular, 0.6–0.85 mm long, 0.5–0.6 mm wide, to 0.3 mm thick, reticulate, brown. Embryo ±half as long as grain.
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