» For the moth genus, see Colocasia (moth). Colocasia's a genus of six to eight species of flowering plants in the family Araceae, native to tropical Polynesia and southeastern Asia (Wagner, Herbst, and Sohmer, 1999). Common name "Elephant-ear", or Taro - this name's also used for some other large-leaved genera in the Araceae, notably Xanthosoma and Caladium. They're herbaceous perennial plants with a large rhizome on or just below the ground surface. The leaves are large to very large, 20-150… (More on Colocasia)