Which appears on more continents, Utricularia species or Witch-hazel species?
Utricularia Utricularia, commonly and collectively called the bladderworts, is a genus of carnivorous plants consisting of approximately 233 species (precise counts differ based on classification opinions; one recent publication lists 215 species). They occur in fresh water and wet soil as terrestrial or aquatic species across every continent except Antarctica. "Utricularia" are cultivated for their flowers, which are often compared with those of snapdragons and orchids, especially amongst carnivorous plant enthusiasts.
Utricularia welwitschii Utricularia welwitschii is a small to medium-sized, probably perennial, carnivorous plant that belongs to the genus "Utricularia". It is endemic to tropical Africa, where it can be found in the Democratic Republic of the Congo, Madagascar, Malawi, South Africa, Tanzania, Zambia, and Zimbabwe. "U. welwitschii" grows as a terrestrial plant in sandy or peaty soils in marshy grasslands at altitudes from 1000 m to 2200 m . It was originally described and published by Daniel Oliver in 1865. Taylor previously described two varieties of "U. welwitschii", "U. welwitschii" var. "odontosepala" and "U. welwitschii" var. "microcalyx", in 1964, but later elevated them to the rank of species as "U. odontosepala" and "U. microcalyx", respectively. It is named in honor of Friedrich Welwitsch.