Herbs twining (type appears erect), pungently odorous. Stems pruinose, terete, shallowly striate, glabrous, densely nodose. Leaves sessile or subsessile; leaf blade ovate, 2-8 × 1.5-5 cm, papery, densely punctate, both surfaces glabrous, veins palmate, 2-3 pairs from base, base cordate, amplexicaul, apex acute or obtuse. Flowers in axils of leafy shoots, solitary. Pedicel ascending, 1-1.5 cm, glabrous; bractlets early deciduous (not seen). Calyx yellowish, throat dark purple; tube rectilinear or slightly curved, abaxially glabrous; utricle globose, 4-5 mm in diam., sessile; tube ca. 15 × 2 mm; limb unilateral, ligulate, ovate-oblong, 2-3.5 × ca. 1 cm, apex acute. Anthers elliptic, ca. 0.3 mm. Gynostemium 6-lobed. Capsule nearly globose, 1.2-1.5 cm in diam., dehiscing acropetally. Seeds ovoid-cordiform, ca. 3 × 3 mm. Fl. Aug-Oct, fr. Dec.
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A twining herb. It has a smell. The leaves are almost without leaf stalks. The leaves are oval and 2-8 cm long by 2-5 cm wide. They are papery. The base is heart shaped. There are 2-3 pairs of veins spreading out from the base. The flowers are in the axils of leafy shoots. They occur singly.
It grows in Yunnan in China. It grows on limestone mountain slopes between 1,600-1,900 m above sea level.
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