Which genus, Rubus or Cunonia, contains the largest number of individual species?
Rubus: Rubus is a large and diverse genus of flowering plants in the rose family, Rosaceae, subfamily Rosoideae, with 250–700 species. Cunonia:  The genus has a disjunct distribution, with 24 species endemic to New Caledonia in the Pacific, and one species (Cunonia capensis) in Southern Africa.
Rubus