Japan Flora: Slightly scandent shrub; branches grayish brown, gray-white puberulent while young; leaves chartaceous, elliptic, ovate to broadly so, 3-7 cm. long, 1.5-3.5 cm. wide, acute at both ends, sometimes obtuse at apex, entire, lustrous, puberulent while very young, the petioles 5-10 mm. long; cymes long-pedunculate, axillary, 3-flowered; calyx 3-4 mm. long at anthesis, becoming obconical, 8-10 mm. long in fruit; corolla-tube 2-2.5 cm. long, the limb about 15 mm. across, pinkish; fruit obovoid, 6-8 mm. across, covered on lower half by the persistent calyx. Wet banks along rivers.

Kyushu (Tancgashima); rare. Ryukyus, Formosa, China, Burma, Malaysia to Australia.