Japan Flora: Rather slender perennial herb; stems decumbent, later much elongate, very slender, branching and creeping, many-leaved, slightly spreading- pilose; stipules lanceolate to ovate, subacute; leaflets 3, thin, subscssile, obovate, elliptic or obovate-orbicular, 1-3 cm. long, 8-20 mm. wide, obtuse to rounded, nearly glabrous above, slightly glaucous and thinly appressed-pilose on nerves be­neath; flowers appearing terminal, but soon axillary, solitary or in a terminal corymb in the upper ones, the pedicels slen­der, 1-4 cm. long; calyx-segments narrowly ovate, acute, nearly as long as the bracts of the caliculus; petals about 3 mm. long, yellow； anthers elliptic; achenes broadly ovate, gla­brous, with few irregular longitudinal lines; styles linear, about 0.7 mm. long. Apr.-Aug. Wooded mountains. 

Hokkaido, Honshu, Shikoku, Kyushu. Korea, n. China, and Ussuri.