Japan Flora: De­ciduous tree with spreading, nearly glabrous branches; leaves petiolate, 20-30 cm. long inclusive of the petiole, the petioles with a cup-shaped gland on the upper side, the rachis and rachilla pubcrulcnt on upper side； the leaflets herbaceous, short-pubescent beneath and on margin, abruptly acute and mucronate, truncate at base, whitish beneath; panicles pubes­cent when young, the axis 2-4 cm. long, with more than 10 spreading branches each 3-4 cm. long and the heads about 20-flowercd; flowers sessile, 7-9 mm. long, pinkish; stamens exserted, 35-40 mm. long; legumes glabrous, short-stiped, 10-13 cm. long, 17-18 mm. wide, 10- to 15-sceded. June-July. Woods and riverbanks in lowlands.

Honshu, Shikoku, Kyushu; very common. s. Asia, as far west as Iran.