Japan Flora: Stout, coarse perennial with stxmt rhizomes; culms 1-2.5 m. long, glabrous; leaf-blades flat, linear, 40-80 cm. long, 1-3 cm. wide, acuminate, rather firm, glabrous except at base above, very scabrous on margins, glaucescent beneath; ligules very short; sheaths glabrous or the lower coarsely hairy; panicles large, open, exserted, 25-40 cm. long, rather digitately many­racemed, the central axis densely pubescent at the base; racemes nearly sessile, often branched at base, 20-40 cm. long, slender; spikelets 5-6 mm. long, lanceolate, acuminate; callus­hairs 10-15 mm. long; glumes lanceolate, herbaceous, pale grayish brown, with hyaline margins, sparsely long-hairy, the first 2-keeled; fertile lemma awnless or with a short, included awn. Sept.-Oct Wet places in lowlands.

Hokkaido, Hon­shu, Shikoku, Kyushu; common. Northeast China, Ussuri, Korea, and n. China.

Russia Flora: Plant 50—200 (250) cm tall, with scaly rhizomes, not forming tufts. Stems erect, glabrous and smooth. Sheaths usually glabrous (but in young shoots often long-hairy); leaf blades 7—18 mm wide, flat, long-acuminate, rather rigid, with whitish thickened midrib, glabrous (only with long hairs at base); ligule of upper leaves about 1 mm long, ciliate. Inflorescence 13—26 (35) cm long, of 8—25 (30) spike-like branches, fan-like expanding upward, densely hairy at lower nodes. Spikelets 4.2—5 mm long, falling entire at fruiting, on pedicels, with upper fertile and lower sterile flower. Glumes thinly leathery, with membranous margin, covered with long silky hairs (up to 10 mm long at spikelet base). Lower lemma of fertile flower ciliate along margin, at apex with very thin point up to 1.5 mm long. Anthers 2—2.7 mm long. 2n=40 (Probatova, Sokolovskaya, 1983a).

Lower Zeya, Bureya (southern), Ussuri. (Fig. 161). — On meadows, sandy ridges in river floodplains, among shrubs. VII—X. Ornamental, soil-stabilizing. — General distribution: Japanese-Chinese. — Described from Amur: "Amur valley above mouth of Sungari River, 10 VIII 1856, K. Maximovich" (lectotype — LE).