Which appears on more continents, Utricularia species or Witch-hazel species?
Witch-hazel: Witch-hazels ("Hamamelis," ) are a genus of flowering plants in the family Hamamelidaceae, with four species in North America ("H. mexicana", "H. ovalis", "H. virginiana", and "H. vernalis"), and one each in Japan ("H. japonica") and China ("H. mollis").
i don't know