is a perennial vine herb found in grasslands in fields and
mountains. Leaves are of an even-pinnately compound leaf, composed
of 4-10 leaflets, and their apexes grow into branching tendrils.
Flowers, 1.5cm in length, blue-red, bloom in racemes with long
peduncles in August-October. Many prefectures designate this species
as an endangered species. Bloom time: August-October.