Densely tufted perennial, roots thick, tomentose, clothed in sand grains; old basal sheaths forming large clumps. Culms 15–30 cm tall, 2–3-noded, lower internodes pubescent. Basal leaves 2/3 length of culms; leaf sheaths shorter than internodes; leaf blades acicular, convolute, outer surface smooth or scabrid, ligule of basal leaves truncate, ca. 0.5 mm, of culm leaves rounded, 1–1.5 mm, ciliate. Panicle narrow, 5–10 cm, branches enclosed in inflated uppermost leaf sheath. Spikelets pale green-brown sometimes faintly purple-tinged; glumes equal or lower glume slightly longer, narrowly lanceolate, 1.5–4 cm, apex long attenuate-filiform; callus pungent, 1–2 mm; lemma 7–10 mm, pilose in longitudinal lines, a ring of soft hairs at apex; awn deciduous, 5–12 cm, hairy throughout, 1-geniculate, column 1.5–2.3 cm, hairs 1–2 mm, bristle 5–8 cm, falcately curved, plumose, hairs 3–5 mm. Fl. and fr. Apr–Jun.
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