Japan Flora: Small deciduous tree; leaves petioled, 20-30 cm. long, the leaflets 7-11, ovate, 4-7 cm. long, acute to subobtuse, appressed-pubescent beneath; inflorescence of 3-7 racemes arranged in a panicle, densely many-flowered, yel­lowish or grayish brown villous, the bracts linear, small; flowers pedicelled, 10-12 mm. long; calyx 5-6 mm. long, villous; legumes broadly linear, flat, 6-9 cm. long, 8-10 mm. wide, appressed-pubescent while young, 3- to 6-seeded, with a narrow wing on the outer suture. July-Sept.

Hokkaido, Honshu. A variable widespread species occurring in China, Formosa, Manchuria, Amur, Ussuri, and Korea.

var. pubescens (Koidz.) Ohwi. Leaflets usually 9-13, rather small, narrowly ovate to oblong, 3-5 cm. long; flowers 7-10 mm. long; legumes 4-8 cm. long, 8-12 mm. wide, appressed-pubescent, the wing on the suture slighdy broader, 1-1.5 mm. wide. Honshu, Shikoku, Kyu­shu.