This is Ipomoea pandurata, also known as Man of the Earth, Big-root Morning Glory, and Wild Potato Vine. This plant likes to live in full sun where it attracts birds, bees, and butterflies. This vine has beautiful white blooms which last from late Summer until early Fall. These roots , if roasted, taste a lot like sweet potatoes. The roots are better to eat when they are at a young age. This is a larval host plant for the Purplish-black Skipper butterfly and the Morning Glory Pellicia moth. USDA Hardiness Zones 6 to 9.