Stems twining, to 1.5 m, slender, puberulent. Petiole 0.5-2 cm; leaf blade ovate, 4-5 × ca. 3 cm, membranous, densely pubescent, base rounded, margin undulate, apex acute; lateral veins ca. 5 pairs. Inflorescences 1- or few flowered; peduncle very short. Pedicel 8-10 mm, glabrous. Sepals subulate-lanceolate, 5-7 mm, ciliate. Corolla ca. 5 cm, base swollen; tube funnelform, basal half yellow, apical half violet, 4-5 mm in diam. near base; lobes oblong, ca. 2 cm, ciliate, sharply incurved at tip. Outer corona lobes triangular-lanceolate, ca. 3 mm, long ciliate; inner lobes ligulate, ca. 3 mm. Follicles fusiform, ca. 13 cm × 5 mm. Fl. Sep-Oct, fr. Oct-Dec.

* Montane forests. Guizhou, Yunnan