Shrubs scandent, to 4 m, glabrous except for flowers. Petiole 1-2 mm; leaf blade narrow lanceolate, rarely linear, 2-6 × 0.3-1.2 mm, base cuneate, apex acuminate; lateral veins numerous, subparallel. Cymes axillary, rarely terminal, shorter than leaves, 1-6-flowered. Flowers ca. 2.7 cm in diam. Pedicel 4-11 mm. Sepals ovate to orbicular, ca. 1 × 0.8 mm. Corolla reddish violet, rotate, glabrous outside; tube ca. 1 mm; lobes linear-lanceolate, 1.1-1.3 cm × 1.5-2 cm, puberulent along midrib on inside. Corona lobes puberulent, 5-6 mm. Stigma head obscurely 2-lobed.

* Guangxi (Banling).