|Scientific Name||Calystegia sepium|
|Common Names||English: Hedge bindweed, Larger bindweed; German: Echte Zaunwinde, Gewöhnliche Zaunwinde; French: Liseron des haies; Spanish: Correhuela mayor, Campanilla blanca|
|Description||Perennial, rhizome-propagated weed with extensively creeping rhizomes.|
Flowers have two leafy bracts at the base. Leaves are triangular in outline with 'dog-ears'.
Large cotyledons if propagated by seeds. The small parts of rhizomes produce roots at the internodes and leaves under favorable conditions.
Twining or creeping, with runners at the base, 1-3 m (3.28 - 9.84 ft) long, may be with or without hairs.
Petioled, alternate, triangular in outline, 5-10 cm (1.97 - 3.93 inch) long, most often found without hairs, pointed tip and distinctive angular bases that are cut squarely across the top (truncate) and resemble the ears of a dog.
Usually pure white, large, corolla up to 7 cm (2.75 inch) long, on long peduncles, axillary, open evenings.
Calyx enclosed by two large, green, cordate prophylls.
Larger than flowers of Convolvulus arvensis.
May - September.
Egg-shaped capsule containing 2-4 seeds.
Germination usually in spring.
Viability Of Seeds
Mostly vegetatively by rhizomes, partly by black seeds, shaped like quartered oranges.
Stream banks, riverbanks, swamps, marshes, ditches, gardens, fields, thickets, fencerows, and roadsides.
C. sepium occurs in almost all soils, but likes fresh to moist, nutrient-rich soils.
Additional Crop Information
Cultivated fields, no-tillage fields.
Because of its quick-growth and clinging vines, it can overwhelm and pull down cultivated plants and even small bushes and trees. Hedge bindweed growth faster than Convolvulus arvensis and is a persistent weed. It can rapidly engulf the rows in vines reducing growth and yield. The extensive mass of vines also makes harvest very difficult. It contains purgative materials which have caused mild distress in swine.
Integrated Crop Management
C. sepium is difficult to control with herbicides. It is important to prevent that rhizomes are moved into other fields by contaminated tillage machinery. Regular ploughing and stubble cultivation decreases population densities as well as early mechanical weeding.
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