Calystegia abyssinica Engler; C. acetosifolia (Turczaninow) Turczaninow, C. hederacea Wallich var. elongata Liou & Ling; Convolvulus acetosifolius Turczaninow; C. calystegioides Choisy; C. wallichianus Sprengel; Volvulus hederaceus (Wallich) Kuntze.

Plants glabrous. Stems erect when young, later shoots prostrate or twining, to 1 m. Petiole 1--5 cm; leaf blade sagittate, triangular to narrowly triangular, 2--8 X 2--7 cm including lobes; lobes abruptly spreading, with 2(or 3) acute angles, sinus with divergent sides. Lower peduncles exceeding leaves, upper peduncles shorter; bracteoles ± ovate, 0.7--1.4(--1.8) cm X (4--)6--10(--12) mm, flat, apex acute to ± obtuse. Corolla pale pink or occasionally whitish or purplish, 2--3.5 cm. Stamens 1.1--1.6(--1.9) cm; anthers 3--4 mm. Fl. Mar-Sep, fr. Jun-Sep. 2n = 22, 30.

Only one collection has ever been made in Africa, from Ethiopia, and only two or three collections have been seen from North America.

Fields, wasteland, roadsides, river banks, often on sandy soils; 100-3500 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Yunnan, Zhejiang [Afghanistan, India, Japan, Korea, Malaysia, Mongolia, Myanmar, Nepal, Pakistan, Russia, Tajikistan; NE Africa, rarely introduced in North America]