Description from Flora of China
Convolvulus dissectus Jacquin, Obs. Bot. 2: 4. 1767; Ipomoea dissecta (Jacquin) Persoon; I. sinuata Ortega; Operculina dissecta (Jacquin) House.
Twiners, semi-woody; axial parts ± yellowish spreading hirsute. Stems woody basally, tuberculate, glabrescent, herbaceous when young. Petiole 2.5-7 cm; leaf blade palmately 5-7-divided nearly to base; segments lanceolate, middle 2.5-10 X 0.5-3 cm, lateral ones smaller, glabrous or pubescent along veins abaxially, margin coarsely dentate to irregularly pinnately lobed, apex mucronulate. Inflorescences 1- to several flowered; peduncle 5-10 cm. Pedicel 1.5-2 cm, thicker distally, minutely tuberculate, glabrous. Sepals ovate-lanceolate, subequal, 2-2.5 cm, enlarged and leathery in fruit, glabrous, margin narrowly scarious, apex acute, mucronulate. Corolla white, with purple-red throat, funnelform, midpetaline bands distinct. Anthers spirally twisted. Ovary glabrous. Capsule globose, glabrous, 2-loculed. Seeds black, glabrous. 2n = 30, 32.
Cultivated and escaped. Guangdong [India, Indonesia, ?Myanmar, Pakistan, Sri Lanka, ?Thailand; native in North and South America].