Perennial. Culms erect, 60–85 cm, softly pilose. Leaf sheaths densely pilose or with caducous tubercle-based hairs; leaf blades linear-lanceolate, 10–60 × 0.5–2 cm, tapering to base and apex, softly pubescent; ligule 1–2 mm, glabrous or ciliolate. Racemes solitary in the upper leaf axils, cylindrical, ca. 12 cm × ca. 2.5 mm, sessile spikelets paired at each node and separated by a pedicel, or occasionally only one sessile spikelet present; rachis internodes strongly clavate, marked with dark lines between the veins on narrow lower portion, base shortly bearded. Sessile spikelet 3–4 mm; lower glume obliquely ovate, with 6–8, prominent, riblike veins separated by deep slits, slits interrupted by tubercle-based hairs along their length, margins narrowly winged toward apex; upper glume keeled toward apex, keel winged; lower floret reduced; upper lemma and palea subequal. Pedicel free, linear, flattened, pilose, bearing a vestigial 0.5–1 mm spikelet. Fl. and fr. Jul–Nov.
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