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: is a genus of about 300 species within the buttercup family Ranunculaceae. 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. Clematis:  Most species are known as clematis in English, while some are also known as traveller's joy, a name invented for the sole British native, "C. vitalba", by the herbalist John Gerard; virgin's bower for "C. viticella"; old man's beard, applied to several with prominent seedheads; leather flower for those with fleshy petals; or vase vine for the North American "Clematis viorna".
Clematis