Convolvulus silvaticus subsp. silvaticus
Greater bindweed (Calystegia silvatica) is a long-lived, perennial climbing herb that is native to southern Europe. It was introduced to New Zealand as a garden ornamental and was first recorded in the wild (naturalised) in 1904. The plant climbs by twining stems and has large, arrow-shaped leaves and white, trumpet-shaped flowers. It flowers from November to April, producing capsules containing seeds, although seed production is uncommon in New Zealand. It tolerates a wide range of soil types and grows in full sun and partial shade. It reproduces mainly vegetatively from creeping rhizomes and stem fragments. Rhizomes and stem fragments are spread by soil movement, cultivation, dumped garden waste and other human activities. Even small rhizome fragments readily produce new plants.
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