Japan Flora: Very sparingly prickly shrub with rather stout branches, the flowering branches glabrous, short; leaves membranous, suborbicular, shallowly cordate at base, 5-10 cm. in diameter, deeply 5-cleft, with long-acuminate doubly toothed segments, appressed-pubescent on nerves on both sides or glabrous above, the stipules filiform; flowers solitary, on slender glabrous pedicels 2-3 cm. long; calyx with nearly flat tube, the segments ovate or oblong, 6-8 mm. long, rounded to obtuse and sometimes with a mucro at apex, short appressed- pubescent on both sides; petals white, about 15 mm. long; fruit globose, fruitlets with dense spreading hairs. May. Mountains.