Any plant of the closely related genera
Convolvulus and
Calystegia, mostly twining, often weedy, and producing funnel-shaped flowers. Bellbine, or greater bindweed (
Calystegia sepium), native in Eurasia and North America, is a twining perennial that grows from creeping, underground stems and is common in hedges and woods and along roadsides. Sea bindweed (
C. soldanella) creeps along European seaside sand and gravel. Several
Convolvulus species are widespread or conspicuous. The weedy perennial field bindweed (
C. arvensis), European but widely naturalized in North America, twines around
crop plants and along roadsides. Scammony, a purgative, is derived from the
rhizomes of
C. scammonia, a trailing perennial native to western Asia. Rosewood oil comes from certain species of
Convolvulus.
For more information on bindweed, visit Britannica.com.