As reported at TCPalm.com, researchers in Florida are taking a closer look at the history of the introduction of the air potato (Dioscorea bulbifera) to the US, in an effort to find a better way to control the invasive vine. The current method of control is to remove the vines by hand, and to collect all the aerial tubers so they can't fall to the ground and grow into new vines. While the scientists search for a potential biological control, they have discovered an interesting fact about the air potato: it turns out there are in fact two different species of the vine that have been introduced, and molecular testing indicates that they are native to Africa.
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