Description from Flora of China
Batatas setosa (Ker Gawler) Lindley; Calonyction pavonii (Choisy) H. Hallier; C. setosum (Ker Gawler) H. Hallier; Convolvulus setosus (Ker Gawler) Sprengel; Ipomoea pavonii Choisy; I. setosa Ker Gawler var. pavonii (Choisy) House.
Herbs annual, twining; axial parts with swollen-based purplish bristles. Stems to 5 m. Petiole 8-15 cm; leaf blade ± circular to broadly ovate in outline, 10-20 cm, 3-7-lobed; margin of lobes undulate-serrate, apex acuminate. Inflorescences 3-12-flowered; peduncle to 20 cm. Pedicel ± clavate, not distinct from calyx base. Flowers nocturnal. Sepals ovate to oblong, unequal, 1-1.4 cm, apex obtuse; outer 2 longer, glabrous or abaxially purplish bristly as stems. Corolla bright purplish to pink, ± salverform; tube 5-6 cm, 4-5 mm in diam. basally, 1-1.2 cm apically; limb 5.5-7 cm in diam., 5-lobed. Stamens included; anthers cordate basally. Pistil included; ovary glabrous. Stigma 2-lobed. Capsule ± globose or depressed globose, 1.5-2 cm in diam. Seeds oblong, brown woolly. 2n = 30.
Dense forests or thickets in valleys; 1000-1300 m. Cultivated and sparingly escaped in Guangdong, S Yunnan [North America (Jamaica, Mexico), South America].