Vinca is an Old World genus of flowering plants in the family Apocynaceae. The English name periwinkle is shared with the related genus Catharanthus. Some Vinca species are cultivated but have also sp

Catharanthus is a genus of flowering plants in the family Apocynaceae. Like the genus Vinca, they are known commonly as periwinkles. It is a perennial herb and a subshrub endemic to Madagascar, with t