Malanga vs. Yautia
I picked up these "roots" at the local Latin grocery store a couple of days ago. The one on the left is "malanga", the one on the right is "yautia". The big question is, what is the difference? Aside from a slight difference in size (malanga was generally bigger), they looked identical to me. The girl at the store insisted they are different and said that the yautia has white flesh, which it does (I broke a piece off); the malanga has pale pink flesh. It will be interesting to see what they grow into. As far as I can tell, both are Xanthosoma; malanga has produced a very handsome elephant ear in previous years (X. sagittifolia?) but I have never grown yautia. Different species? Different cultivars? Who knows.
Here's the malanga I grew a couple of years ago: