Rosary vine (Ceropegia woodii variegata) is a very easy houseplant to grow. It has many common names. You may also hear it referred to as Sweetheart Vine or String of Hearts. This unusual, hardy vining succulent produces pretty, variegated, heart-shaped leaves with purple undersides on tough, wire-like stems. Ceropegia woodii trails nicely and makes an unusual hanging plant. The vines can grow to be two or three feet long, and the pretty leaves are deep green with variegated silver markings.