Plants prostrate or climbing with tuberous roots, perennial. The stems usually somewhat succulent, glabrous or pubescent. Leaves variable, from cordate to ovate, entire, dentate or often deeply lobed, 5-10 cm long, glabrous or pubescent. Flowers absent in some varieties, frequent in others, in few-flowered cymes or sub-umbellate-cymose. Sepals oblong, the outer acuminate and cuspidate, (8-) 10-15 mm long, mostly pubescent or only ciliate. Corolla with a lavender to purple limb and darker throat, white in some varieties, 4-7 cm long. Fruits rarely formed, ovoid, glabrous.

Fl. Per.: October to July.

Type: India, (LINN 218.12).

G-4 Karachi University Campus, 5.12.65, S. Qureshi s.n. (KUH).

Distribution: An American root crop, grown throughout the tropical and subtropical regions of the world.

Commonly cultivated for the edible tubers.