Description from Flora of China
Convolvulus pileatus (Roxburgh) Sprengel.
Herbs annual, twining, with ± densely retrorse hispid-pilose axial parts. Stems 1-2 m. Petiole 1.5-6 cm; leaf blade cordate-ovate, 2.5-9 X 2.5-7.5 cm, pilose, more densely so abaxially, base cordate, margin entire, apex acuminate or attenuate. Inflorescences capitate, few to several flowered; peduncle 1.5-7 cm; involucral bracts navicular, tapered at both ends, 2.7-5.5 cm, outside densely pubescent, inside long hirtellous; bracteoles oblong-spatulate, much smaller, villous. Sepals subequal, 8-10 mm; outer 3 elliptic-spatulate; inner 2 narrower, lanceolate, villous, apex obtuse. Corolla pink or purple, salverform, 2.5-3 cm; tube cylindric; limb with deltate lobes, midpetaline bands pilose. Stamens inserted near middle of corolla tube. Ovary glabrous. Capsule ± globose, 5-6 mm in diam. Seeds dark brown, 3-4 mm, glabrous or short pubescent.
Edges of forests, clearings on mountain slopes, roadsides, grasslands; 100-1000 m. Guangdong, Guangxi, Hainan, Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Philippines, Sri Lanka, Thailand, Vietnam; Africa].