Herbs climbing, glabrous. Stems terete, thinly angular. Petiole 4.5-9 cm; leaf blade circular-cordate, 6-14 X 4-10 cm, base narrowly cordate, entire, apex abruptly acuminate; lateral veins 6 or 7 pairs, arcuate ascending. Inflorescences few flowered; peduncle 1-2 cm. Pedicel 2-3 cm, thickened apically. Sepals narrowly ovate, unequal, glabrous; outer ones 1.5-1.7 X 1-1.2 cm, apex rounded-obtuse; inner ones 1.7-1.9 cm, apex acute. Corolla funnelform, ca. 7.7 cm, glabrous. Stamens included. Pistil included; ovary glabrous. Stigma 2-lobed. Capsule unknown. Fl. Nov.

* Thickets, waysides; ca. 900 m. Yunnan.