A plant related to Xanthosoma and this genus are both flowering plants. The Securigera plant, another flowering plant, is a member of the same genus.
Colocasia is a genus of flowering plants in the family Araceae, native to southeastern Asia and the Indian subcontinent. 
The genus Coronilla contains about 20 species of flowering plants native to Europe and North Africa. 
 Many other species (including especially "X. roseum") are used 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 "Caladium", "Colocasia" (i.e., taro), and "Alocasia". 
 It is a segregate of the genus "Coronilla". 
