Herbs twining, 1-3 m tall. Stems densely brown pilose, with spreading or retrorse hairs. Petiole 3-16 cm, pilose; leaf blade cordate-ovate, 5-18 X 5-15 cm, base deeply cordate, margin entire, angulate, or shallowly 3-7-lobed; lobes acute or acuminate, appressed pilose; young leaves tomentose. Cymes axillary, few to many flowered; peduncle short or absent. Pedicel ca. 7 mm, glabrous or pilose. Sepals lanceolate, subequal or inner shorter, 5-7.5 mm, slightly enlarged in fruit or not, herbaceous, hirsute abaxially, attenuate acuminate. Corolla white or yellowish white, urceolate, 1.2-1.5 cm; tube inflated basally, contracted apically, upper part of tube and midpetaline bands pubescent outside; limb spreading, shortly 5-lobed; scales at filament bases concave, papillose abaxially. Disc 5-lobed. Ovary glabrous or pubescent. Capsule globose to ovoid, 6-8 mm, apiculate. Seeds 4 or fewer, black, ovoid, 3-4 mm. Fl. Dec-Jan, fr. Jan.

Four varieties: China, NE India, throughout SE Asia, W Pacific, two varieties in China