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Perennial, densely tufted; old basal sheaths papery, persistent around each culm base. Culms stiffly erect, 5–60 cm tall, woolly especially below panicle, 2–3-noded. Leaf sheaths glabrous or pubescent; leaf blades grayish green, usually rolled, sometimes flat, up to 30 cm, 1–2 mm wide, pubescent or adaxial surface glabrous; ligule 0.2–2 mm. Panicle linear-oblong in outline, 1.5–13 cm, lower part often interrupted and lobed, silvery green or tinged purple; axis and branches woolly. Spikelets 3–7 mm, florets 2–3(–4); rachilla hairs less than 0.4 mm or glabrous; glumes slightly unequal, punctate-scaberulous, keel scabrid, lower glume narrowly lanceolate, 1.5–4 mm, upper glume elliptic-oblong, 2.5–5.5 mm, apex acute; lemmas lanceolate, 2.6–5.5 mm, punctate-scaberulous, apex acute, cuspidate, or rarely keel extended up to 0.3 mm into apical mucro; palea keels ciliolate. Anthers 1.2–2.3 mm. Fl. and fr. May–Sep.
A grass. It forms loose tufts and keeps growing from year to year. It can have creeping rhizomes or underground stems. It grows 10-40 cm high. The leaf blades are 15 cm long and 1-2 mm wide.
