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It is a perennial, tropical plant primarily grown as a root vegetable for its edible starchy corm, and as a leaf vegetable. It is a food staple in African, Oceanic and South Indian cultures and is believed to have been one of the earliest cultivated plants. <ref name="des"/> Colocasia is thought to have originated in the Indomalaya ecozone, perhaps in East India, Nepal and Bangladesh, and spread by cultivation eastward into Southeast Asia, East Asia and the Pacific Islands; westward to Egypt and the eastern Mediterranean Basin; and then southward and westward from there into East Africa and West Africa, where it spread to the Caribbean and Americas. It is known by many local names and often referred to as "elephant ears" when grown as an ornamental planplant.