Japan Flora: Plants elongate, branched, usually with short coarse hairs; leaves relatively large, green, cordate, 6-12 cm. long, 4-10 cm. wide, palmately 5- to 9-lobed, the median lobes narrowly ovate, acuminate, the lateral lobes rounded to obtuse, smaller; staminate inflorescence sometimes branching, the flowers short- pedicelled, becoming reddish brown when dry; tepals spreading, rather thick; capsules obovate-orbicular; seeds wing- margined. July-Sept.

Honshu (centr. distr. and westw.), Shikoku, Kyushu. Korea, China, and Ryukyus.