Japan Flora: Sinistrorsely twining woody vine; stipules linear, ab이it 8 mm. long, caducous; leaflets 9-13, narrowly ovate, 4-6 cm. long, 15-30 mm. wide, pubescent on both sides when young, persisting on lower side, the stipels obscure; racemes 10-20 cm. long, the bracts caducous, ovate, acuminately caudate, densely brown- pubescent outside; flowers purple, opening nearly at the same time; ovary villous.    May-July. Mountains and hills.

Hon­shu (w. distr.), Shikoku, Kyushu; rather rare.

cv. Alba. Flowers white. cultivated.