The Collaborative International Dictionary of English v.0.48:
Calystegia \Calystegia\ n. a genus of climbing or scrambling herbs; bindweed. Syn: genus Calystegia. [WordNet 1.5]WordNet (r) 3.0 (2006):
Calystegia n 1: climbing or scrambling herbs: bindweed [syn: Calystegia, genus Calystegia]