Welcome to ATP, Daylilylady!
Air potato is a very pretty vine, but is a terrible weedy pest here in Florida. So, if you live somewhere warm, Beware!! It will seed itself widely and you'll never be rid of it.
Also, be sure to tell the lady the 'potatoes' are not edible, just in case she was thinking it was an edible plant. I get potatoes that are quite large sometimes - softball size is not unusual.
