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A deciduous shrub 5 to 10 ft high, with glabrous, bifurcating branches. Leaves obovate, 3⁄4 to 11⁄2 in. long, half to two-thirds as wide, finely round-toothed, glabrous, or with a few hairs at the base of the midrib beneath. Flowers in a nodding raceme of ten or twelve blossoms, produced in May, each on a downy stalk 1⁄4 to 1⁄2 in. long. Corolla bell-shaped, 1⁄4 in. long and broad, white, the margin cut up into numerous slender-pointed, unequal teeth; calyx-lobes ovate-lanceolate, fringed with short hairs; seed-vessel 1⁄6 to 1⁄4 in. long.
Native of Japan. It is easily distinguished by the almost fringed mouth of the corolla.
† var. matsudae (Komatsu) Makino E. matsudae Komatsu – Leaves narrower than in the typical variety, deep red. Native of the main island of Japan.