Climbers with glabrous twining stems. Leaves ovate, acuminate apically, cordate basally, 3-7 x 2-6 cm. Flowers in axillary cymes, 3-9 cm long. Sepals ovate-lanceolate, 4-6 mm long. Corolla blue to violet, the tube white, 4-6 cm long, funnelform. Fruit capsular, ovoid, 8-10 mm long, mucronate because of the persisting style base. Seeds 4-5 mm long, black, minutely pubescent.

Type: Not found, presumably in Madrid.

G-5 Hydrabad Dist.: Hydrabad, Saida Qureshi s.n. (KUH).

Distribution: Originally from the Americas, probably Mexico, and now cultivated in many parts of the world.

This species is occasionally cultivated in Pakistan for its flowers. Horticultural races have been developed and are sold in some parts of the world under the names of ‘Heavenly Blue,’ and a white-flowered plant ‘Pearly Gates.’