air potato or air-po·ta·to (ârʹpə-tā'tō)
A tropical Old World yam (Dioscorea bulbifera) having axillary potatolike tubers, some of which are edible after cooking. It is a weed in the tropics and Florida. Also called aerial yam, potato yam.
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Dioscorea bulbifera — Air potato Scientific classification Kingdom: Plantae (unranked) … Wikipedia