Rhynchosia volubilis (species of snoutbean)
A species of leguminous vine native to East Asia. The name literally means 'phlegm-cutting bean', referring to traditional medicinal use.
Rhynchosia volubilis produces small yellow flowers in autumn.
この辺りの山道ではタンキリマメがよく見られる。
Rhynchosia volubilis is often seen along mountain paths around here.