Japan Flora: Large shrub or small tree to 5 m. high; leaves with scattered, long, appressed hairs while young, glaucous and appressed-pilose on the nerves and stellate-pubescent beneath while young, usually becoming glabrate; flowers about 10 mm. long; petals obovate; stamens nearly as long as the petals, the anthers purplish. Apr. Mountains;

Honshu (centr. distr. and westw.), Shikoku, Kyushu；rather rare.