Bindweed

Plants of the closely related genera Convolvulus and Calystegia, mostly twining, often weedy, and producing handsome white, pink, or blue, funnel-shaped flowers. Bellbine, or greater bindweed (Calystegia sepium), native in Eurasia and North America, bears arrow-shaped leaves and white to pink, 5-centimetre (2-inch) flowers. This twining perennial grows