Japan Flora: Peren­nial herb with slender elongate stolons to 80 cm. long; rhi­zomes short, ascending, rather slender; leaves few, sub coria­ceous, ternate, sparingly pilose, the terminal leaflet slighdy larger than the lateral, elliptic to obovate-elliptic, 2-5 cm. long, 1-2 cm. wide, obtuse, cuneate at base; scapes slender, 10-25 cm. long, ascending, few-bracted and few-flowered; flowers pale yellow, 12-13 mm. across; bracts of caliculus shorter than the sepals, linear-oblanceolate; sepals 5, deltoid- lanceolate, 4-5 mm. long, acute; petals 5, obovate, slightly emarginate; receptacle pilose. Apr.-June.

Honshu (Kinki Distr. and westw.); rare.