Description from Flora of China
Herbs twining, with ± whitish gray hirsute axial parts. Petiole 5-10 cm; leaf blade broadly ovate-cordate, 5-8 4-8(-10) cm, ± pilose to glabrous, base deeply cordate, margin sinuately 3-5-lobed distally, apex obtuse or apiculate. Cymes many flowered; peduncle ca. 1 cm. Pedicel slender. Sepals ovate or ovate-lanceolate, 2.5-3 mm, sparsely pilose to subglabrous abaxially, apex obtuse or acute. Corolla whitish green, 1.8-2.2 cm; tube inflated, slightly contracted distally; limb 1.5-1.8 cm in diam., margin subentire. Stamens included in tube; filaments filiform, ca. 3 mm; basal scales ovate-lanceolate or ovate-elliptic, ca. 2.5 X 3.5 mm, papillose-pilose abaxially; anthers ca. 2 mm. Disc ringlike, ca. 1 mm high. Style 1.5-2 mm; stigmas globose-capitate, papillose. Capsule with persistent calyx, ovoid, 6-7 mm high, glabrous. Seeds 4, dark brown, subovoid, ca. 4 mm, sparsely pale yellowish villous. Fl. Jul-Sep, fr. Aug-Sep.
* Valley forests, streamsides. Fujian, Guangdong, Guangxi, Hainan, Zhejiang.