Which genus has more species, the Catharanthus or the Bosea?
Catharanthus: Catharanthus is a genus of flowering plants in the dogbane family, Apocynaceae. Catharanthus:  There are eight known species. Bosea (plant): Bosea The genus of evergreen, woody shrubs contains 3 species that are geographically widely separated; one in the Canary Islands, one in Cyprus and one in the western Himalayas.
Catharanthus