Wild Potato Vine (Man-of-the-Earth)
Perennial, trailing or climbing vine. Flowers 1-7 in terminal clusters, each flower on a long peduncle, funnel-shaped, to 3 inches long, white with a dark crimson or purple center. Blooms May–September. Leaves on long stems, heart-shaped, pointed, to 6 inches long. Root a tuber to 2 feet long and weighing 20 pounds or more, often branched, leglike.