Japan Flora: Thinly pubescent or glabrescent, a scandent per­ennial herb; stems 80-180 cm. long; leaves very short-petioled, 8-15 cm. long, the stipules coarsely dentate, rather large, die leaflets 10-16, oblong to lanceolate, 15-30 mm. long, 4-10 mm. wide, rounded to subacute; racemes 4-8 cm. long, densely many-flowered, one-sided, on peduncles 2-7 cm. long; flowers purple, 12-15 mm. long, the bracts minute; calyx-teeth un­equal, the lower tooth broadly linear, shorter than to nearly as long as the tube; legumes narrowly oblong, flat, 2-2.5 cm. long, about 5 mm. wide; glabrous. Aug.-Oct. Thickets in lowlands and low mountains.

Hokkaido, Honshu, Kyushu; rather common. Siberia, China, Korea, Manchuria, Sa­khalin, and s. Kuriles.