The String of Hearts (Ceropegia woodii) is a straggly evergreen climber with delicate heart-shaped foliage and slender vines can reach up to 12' long in its natural environment. The simple, opposite heart-shaped leaves are 1-2 cm wide and long. They are dark green marbled with silver on the upper surface and green to purple on the underside. Small tubers, which look somewhat like little potatoes, form at the nodes or leaf bases along the stems another possibility for the “beads” that give rise to the common name of rosary vine.