Climbing or prostrate shrub, soon glabrescent, with slender branches. Leaves bitemate. Leaflets 25-70 mm, stalked, ovate-lanceolate, petiolate, coarsely serrate-dentate with mucronate teeth, the terminal ones often tri-lobed, lateral ones obliquely bilobed. Flower pale-lemon, solitary, on long peduncles. Sepals up to 7.5 (-8) cm, ribbed, lanceolate, acuminate, acute or obtuse with a few scattered hairs. Staminodes lacking, but outer stamens with widened, but never subpetaloid filaments. Achenes with long silky and vinous hairs. Styles plumose-ciliate.