Which appears on more continents, Utricularia species or Witch-hazel species?
Utricularia:  They occur in fresh water and wet soil as terrestrial or aquatic species across every continent except Antarctica. Utricularia:  "Utricularia" are cultivated for their flowers, which are often compared with those of snapdragons and orchids, especially amongst carnivorous plant enthusiasts. 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