Which genus has more species, Acanthus or Clematis?
Acanthus (plant): Acanthus is a genus of about 30 species of flowering plants in the family Acanthaceae, native to tropical and warm temperate regions, with the highest species diversity in the Mediterranean Basin and Asia. Clematis:  Their garden hybrids have been popular among gardeners, beginning with "Clematis" × "jackmanii", a garden standby since 1862; more hybrid cultivars are being produced constantly.
i don't know