Culms 10–25 cm tall, 2–3-noded, glabrous or pubescent below nodes. Basal leaves equaling or overtopping culms; leaf sheaths glabrous, shorter than internodes; leaf blades convolute, acicular, outer surface smooth or scabrid; ligule ca. 1 mm, obtuse, densely pilose. Panicle contracted, 4–10 cm, branches usually enclosed by inflated uppermost leaf sheath. Spikelets pale greenish; glumes narrowly lanceolate, equal or lower glume slightly longer, 2–3.5 cm, apex hyaline, long attenuate-filiform; callus pungent, 1.5–2 mm; lemma 7–10 mm, pilose in longitudinal lines, apex with a ring of short hairs or glabrous; awn deciduous, 6–13 cm, 1-geniculate, column 1–2.5 cm, glabrous, bristle 4–14 cm, plumose, hairs 3–6 mm. Fl. and fr. Jun–Jul.