lobes 5, free, green or reddish, pubescent; corolla oblique in the calyx, the tube spurred, infundibuliform, the limb 5-lobed; stamens 4, included; disc reduced to a single bibbed gland; ovary superior, the stigma stomnatomorphic. Fruit an ovoid, laterally compressed berry; seeds striate, the base surrounded by an aril. Chromosomes n = 9 (Wiehler, 1975).