Rivea

Morphological Summary

Genus of tropical and subtropical vines in the family Convolvulaceae, distributed mainly in Africa, Madagascar, and southern Asia. Its representatives produce showy tubular flowers and, in African species, fleshy tuberous roots that act as storage organs during the dry season. Historically confused with related genera such as Convolvulus and Ipomoea, its current circumscription is restricted to a small number of species.