Original: The genus Ipomoea that contains the sweet potato also includes several garden flowers called morning glories, though that term is not usually extended to Ipomoea batatas. Some cultivars of Ipomoea batatas are grown as ornamental plants; the name "tuberous morning glory" may be used in a horticultural context.
Simplified: The Sweet Potato (Ipomoea batatas) is a plant that is a member of the morning glory family, grown for its sweet, edible, tuberous roots.