This revision to Xanthosoma illustrates the difficulties when dealing with the cultivated species I mentioned earlier, specifically X. sagittifolium.
The Commonly Cultivated Species of
Xanthosoma Schott (Araceae), including Four New Species
by E. G. Goncalves, Aroideana Volume 34, 2011
In the article Goncalves argues that while "It has has been stressed that many forms can be considered cultivars of
Xanthosoma sagittifolium...it seems that most authors are not completely sure about what constitutes
Xanthosoma sagittifolium..."
The described species are as follows:
(species that "...can be considered cultivars of
Xanthosoma sagittifolium..." are denoted, below, by an *).
*
*
Arrow Leaf Elephant's Ear (Xanthosoma sagittifolium) *
*
Tanier spinach (Xanthosoma brasiliense)
*
Crested Elephant Ear (Xanthosoma sagittifolium 'Lineatum')
*
*
Elephant Ear (Xanthosoma riedelianum)
Arrowleaf Elephant Ear (Xanthosoma robustum)
Elephant Ear (Xanthosoma taioba)
*
