Ipomoea turpethum (Linn.) R.Br.
Perennial climbers, the stem narrowly 3-5-winged, sulcate or angular, glabrous or sparsely pilose. Leaves variable, orbicular, broadly ovate, ovate-lanceolate or lanceolate, 5-15 cm long, basally cordate to hastate, apically acuminate, acute or obtuse to rounded, the margins entire or more commonly dentate to shallowly lobed, the upper surface glabrous or nearly so, the lower surface pubescent. Flowers solitary or cymose. Sepals ovate or broadly ovate, the outer 1.5-2.5 cm long, the inner 2 cm long, acute or shortly acuminate, the outer pubescent, the inner glabrous. Corolla white or white with a yellowish base, campanulate to broadly funnel-shaped, 3-4.5 cm long. Fruits capsular, depressed-globose, 1.5 cm wide. Seeds dull black, glabrous.
Fl. Per.: Probably March and April.
Type: Ceylon, Hermann herb. 2:68 (BM, lectotype fide Verdcourt, a specimen which is probably an isolectotype is in the Hermann herb. 2:135 in Leiden).
Distribution: Reported from tropical Africa, in southern Asia, Australia and Polynesia, introduced in West Indies.
This species has not been reported from Pakistan so far but it is to be expected. It is found in the adjoining areas in India and is occasionally cultivates. The stems and the roots are used in medicine.