Japan Flora: Perennial; culms erect, ascending or short-creeping at base, 80-120 cm. long, branching, glabrous; leaf-blades flat, linear to broadly so, glaucous, 20-30 cm. long, 3^7 mm. wide; ligules truncate, about 0.5 mm. long, ciliolate; sheaths short, glabrous; racemes 5-8 cm. long, narrow, subulate, slightly curved; rachis joints 4-6 mm. long, fused with the pedicel; sessile and pedicelled spikelets similar in shape; first glume 5-8 mm. long inclusive of the basal callus, lanceolate to broadly so, gradually narrowed from base to the obtuse apex. July-Sept. Wet places in lowlands.
Honshu, Shikoku, Kyushu; common. Korea, China, Manchuria, Ussuri, and c. Siberia.