They are typically found in forest habitats in tropical West and Central Africa, scrambling over trees, but a few species are large shrubs.

They have simple, glossy green leaves in opposite pairs, jasmine-like flowers with tubes and parts in fives, and hard-shelled, fleshy fruits with several seeds embedded in the pulp.

After fruiting, the flower stem develops into a twisting tendril which branches near its tip.

[2][3] Members of this genus exude latex when the bark is damaged.

Many species have large edible fruits which are sweet and juicy and rich in beta-carotene.