Vines to 5 m or longer, climbing. Stems glabrous except for a circle of trichomes on nodes. Petiole 5-7.5 cm, glabrous; leaf blade ovate to lanceolate-ovate, 4-13 × 2-6 cm, abaxially subglabrous, adaxially pubescent or setose, base rounded to broadly cuneate and decurrent onto petiole, margins obscurely toothed to sometimes irregularly denticulate, apex acuminate. Flowers axillary, solitary; bracteoles elliptic, 2.1-2.4 × 1.5-1.7 cm, abaxially glabrous, adaxially gland-tipped hairy, palmately 7-veined, apex mucronate. Calyx minute, 10-toothed. Corolla pinkish or white; tube basally cylindric for ca. 7 mm, throat ca. 3.5 cm; lobes orbicular, ca. 1.2 cm in diam., equal. Staminal filaments glabrous, ca. 1 cm; anther thecae ca. 7 mm, barbate, spurred at base, spurs hairlike. Ovary glabrous; style ca. 2.5 cm, glabrous; stigma funnel-shaped, 2-cleft. Capsule glabrous, basal part ca. 1 × 1.8 cm, beak ca. 1.8 cm. Seeds reniform, ca. 8 × 5 mm. Fl. Aug-Dec, fr. Mar-May.
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A vine. It grows 5 m long. It can be climbing. The leaves are oval or sword shaped and 4-13 cm long by 2-6 cm wide. The flowers occur singly in the axils of the leaves. They are pink or white. They are tube shaped.
It is a subtropical plant. It grows in forests or thickets between 1,000-2,500 m above sea level in SW China. In Yunnan.
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