Xanthosoma atrovirens

K. Koch & Bouché 1854

This plant has edible tubers after cooking. Some other members of this genus too.
It comes from the tropical America, where it is called Yautia amarilla.

photos © David Boudreaux
It is easy to recognize by rounded posterior lobes and glaucous leaf surface. photos (3-4) © Michael Kolaczewski

Tropicos: Xanthosoma atrovirens