Japan Flora: Stout perennial herb; stems erect, 1-2 m. long, hispid or hispid-pilose, angled; leaves large, the terminal leaflets orbicular, shallowly cordate, 15-25 cm. in diameter, palmately (3-)5-cleft, doubly incised- toothed, green, hispid, the lateral leaflets few, very small, often obsolete in the upper leaves, the stipules green, incised-toothed, with an obliquely spreading auricle at base on one side; in­florescence large, with short spreading straight liairs on pedi­cels and branches; flowers white or slightly pink, 6-8 mm. across; calyx-lobes reflexed; petals obovate-orbicular, nearly entire; stamens 1.5 times as long as the petals; carpels 5; achenes oblanceolate, long-ciliate. June-Sept. Mountains.

Hokkaido, Honshu (centr. and n. distr.); often gregarious along streams and ravines; variable as to indument. Sometimes distinguished are:

f. pilosa Koidz. with looser shorter hairs on stems and leaves, and

f. glabra Koidz. with nearly glabrous stems and leaves.