Kh'merican Backyard Gardening. Vegetables and Herbs

(Dioscorea rotundata??) is an african cultivar that has rounded stems, thorns, and leaves are completely different, darker green, and on the stiff side. As for this variety, it isn't prickly, and leaves are elongated heartshape.  What variety is it? ដំឡូងជ្រូក

 ត្រាវ (Xanthosoma sagittifolium) Commonly called Malanga.  (Xanthosoma sagittifolium) Malanga  (Xanthosoma violaceum) Malanga Lila.