Xanthosoma is a genus of about 50 species of tropical and sub-tropical arums in the flowering plant family, Araceae, all native to tropical America. Several species are grown for their starchy corms, an important food staple of tropical regions, known variously as malanga, new cocoyam, tannia, tannier, yautÃa, macabo, taioba, dasheen, quequisque and ‘ape. Many other species (including especially X. roseum) are utilized as ornamental plants, and in popular horticultural literature are known as ‘ape or elephant ear (from the purported resemblance of the leaf to an elephant's ear), although the latter name is sometimes also applied to members with similar appearance and uses in the closely related genera of Caladium, Colocasia (i.e., taro), and Alocasia.
The leaves of most Xanthosoma species are 40-200 cm long, sagittate (arrowhead-shaped) or subdivided into 3 or as many as 18 segments. Unlike the leaves of Colocasia, those of Xanthosoma are usually not peltate—the upper v-notch extends in to the point of attachment of the leaf petiole to the blade.