Japan Flora: Small tree with rather prominent ap- pressed hairs on young branchlets, inflorescence, petioles, and nerves of leaves beneath; leaves obovate or rhombic-elliptic, gradually narrowed above or short-caudate, 4-8 cm. long, 2.5-6 cm. wide, coarsely and acutely double-toothed, appressed-pilose to glabrate on upper side, the petioles 7-15 nun. long, the glands on or near base of leaf-margin; flowers 牛-7, in loose corymbose racemes, white, small, the bracts ovate-orbicular, persistent, 5-8 mm. long, toothed, the pedicels 10-15 mm. long; calyx-tube obconical, somewhat longer than the denticulate ovate lobes, pilose; style pilose or glabrous at base. June. Mountains.
Hokkaido, Honshu, Kyushu. Sakhalin, Korea, Manchuria, and Ussuri.