Description from Flora of China
Shrubs or slender climbers. Stems villous or strigose. Leaves petiolate, linear or elliptic, sericeous or strigose. Flowers solitary, axillary, nodding; bracts 2-4, leaflike. Sepals 5, ovate-oblong to circular, ± equal, leathery, slightly enlarged in fruit. Corolla campanulate, waxy; limb erect, subentire or shallowly 5-dentate. Stamens included; anthers oblong; pollen globose, pantoporate, finely spiny. Disc ringlike. Pistil included; ovary conical, ± 2-loculed, glabrous. Style 1, filiform; stigma capitate, 2-lobed. Fruit a berry, enclosed by persistent calyx, glabrous. Seeds 1-4, glabrous.
Two species: China, Myanmar, N Thailand; one species in China.