Perennials, erect, caespitose. Flowering culms to 150 cm high. Leaves: basal leaf sheath margins glabrous; ligule a ciliate membrane, to 0.1 mm long; blade folded or convolute, linear, 1–50 cm long, to 0.8 mm wide, with smooth margins. Inflorescences paniculate, irregular, open to contracted and spiciform, 19–45 cm long; primary branches solitary, equalling or longer than adjacent internodes, spreading or appressed at apex of inflorescence, without spikelets in the lower quarter, with spikelets loosely spaced and fairly even. Spikelets subsessile or pedicellate, to 1.6 mm long; pedicel 0.4–2 mm long. Glumes: lower glume elliptic or lanceolate, 0.5–0.75 mm long, acute or obtuse, without nerves; upper glume lanceolate, at least half spikelet length, 1–1.5 mm long. Lemma elliptic, to 1.6 mm long, acute, 1-nerved. Palea subequal to lemma, emarginate. Anthers 3, 0.6–0.9 mm long. Grain triangular longitudinally, quadrangular in T.S., to 0.9 mm long, to 0.6 mm wide, to 0.4 mm thick, rugose, dark brown. Embryo less than half as long as grain.
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