the air potato found at invasive.org, found under creative commons law photo by f. nation
This yam under phylum name is known as dioscorea bulbifera L. It's also known as a Chinese yam, cinnamon vine and the air potato.
The air potato grows in the Southeastern United States, Southern Alabama and Florida. It grows in subtropical areas. It has heart shaped leaves and a tuber type of fruit. The limbs of the vine is small and limber.
These plants were used for medicinal purposes and food in Africa and Asia long ago. The invasives were brought over as ornamental like many other invasive species
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