A tree 70 to 100 ft high; young shoots downy. Leaves roundish ovate, 3 to 6 in. long, scarcely as wide; contracted at the apex to a short point, heart-shaped at the base, coarsely toothed, dark green and slightly downy above, covered beneath with grey stellate down, and furnished with conspicuous tufts in the axils of the veins; stalk 11⁄2 to 3 in. long. Flowers not seen in this country but described as being produced in clusters of ten to eighteen, the floral bracts 3 to 4 in. long, downy. Fruits 3⁄8 in. long, ribbed.
Native of Japan in Hokkaido and the northern part of the main island. It was introduced to Kew from the Arnold Arboretum in 1890, but this tree did not thrive and had not flowered by 1913. The present tree, planted in 1910, flowers freely in July and measures 55 × 41⁄4 ft (1967). The species is uncommon in Britain, and the only other sizeable example grows in the Thorp Perrow collection.
From other Asiatic species with the leaves tomentose beneath this differs in having tufts of brownish hairs in the leaf-axils.