Japan Flora: Perennial herb slightly woody at base, 60-100 cm. high; stems erect, usually simple, slightly pilose; stipules lanceolate, 3- to 5- nerved, 3-5 mm. long, deciduous; leaves chartaceous, deep green on upper side, slightly paler beneath, with appressed hairs especially on midrib on upper side, the terminal leaflets ovate to broadly so, 6-10 cm. long, 3-5 cm. wide, acuminate, the lateral leaflets slightly smaller, rounded-truncate at base on outer margin; racemes loosely flowered, 10-30 cm. long, short- pilose, the bracts subulate, minute; flowers about 7 mm. long, reddish purple; calyx-lobes depressed; legumes with stipe 10- 15 mm. long, the joints 2 or 3, semi-obovate, 8-13 mm. long, minutely pubescent. Aug.-Oct. Woods.

Honshu (Totomi Prov.), Shikoku, Kyushu; rare. China and Formosa to India and Malaysia.