Japan Flora: Scandent perennial herb; stems 80-150 cm. long, short-pubescent, glabrate; stipules dentate or bifid; leaflets 15-30 mm. long, 8-12 mm. wide; racemes 2-5 cm. long. July-Sept. Hills and low mountains.
Honshu (Kai and Shinano Prov.), Kyushu; rather rare. Korea, Manchuria, Amur, and Ussuri.