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.

Russia Flora: Plant 60—120 (150) cm tall, with long scaly rhizomes. Stems with 5—8 nodes, branching, glabrous and smooth. Sheaths laterally compressed, weakly keeled in upper part, smooth; leaf blades 3—6 mm wide, linear, flat, grayish, rough above; ligule of upper leaves about 0.5 mm long, ciliate. General inflorescence — spikes 4—8 cm long and 0.2—0.4 cm wide, laterally compressed, solitary or 2—3 in axils of upper leaves. Spikelets 4.5—6 (7) mm long, linear-lanceolate, paired in depressions of inflorescence axis. Lower glume of sessile spikelet with 7—9 veins, 5—8 mm long, leathery-cartilaginous, obtuse, upper — membranous, adnate to depression of inflorescence axis. Floral scales of bisexual upper flower membranous, lower — awnless, shorter than glumes. Anthers 1.7—2.8 mm long.

Lower Zeya, Bureya (along Amur), Ussuri (Fig. 162). — On river and lake gravels, in meadows, forest clearings, among shrubs, sometimes on fallows; rare. VII—X. Protected. — General distribution: Japanese-Chinese. — Described from Khabarovsk: "Near Khabarovsk, 13 VIII 1909, H. F. R. № 2392, H. Desulavy" (isotype — LE).