Vinca (/ˈvɪŋkə/;[2]Latin: vincire "to bind, fetter") is an Old World genus of flowering plants in the family Apocynaceae, The English name periwinkle is shared with the related genus Catharanthus (and with the mollusc Littorina littorea). Some Vinca species are cultivated but have also spread invasively. Additionally, some species have medicinal uses. The most widespread species is Vinca minor.
Vinca plants are subshrubs or herbaceous, and have slender trailing stems 1–2m (3+1⁄2–6+1⁄2ft) long but not growing more than 20–70cm (8–27+1⁄2in) above ground; the stems frequently take root where they touch the ground, enabling the plant to spread widely. The leaves are opposite, simple broad lanceolate to ovate, 1–9cm (1⁄2–3+1⁄2in) long and 0.5–6cm (1⁄4–2+1⁄4in) broad; they are evergreen in four species, but deciduous in the herbaceous V.herbacea, which dies back to the root system in winter.[3][4]
The flowers, produced through most of the growing season, are salverform (like those of Phlox), simple, 2.5–7cm (1–3in) broad, with five usually violet (occasionally white) petals joined together at the base to form a tube. The fruit consists of a pair of divergent follicles; the dry fruit dehisces along one rupture site to release seeds.[3][4]
Vinca majorL. – southern Europe, Turkey, Syria, Caucasus; introduced to and established in New Zealand, California, British Isles, central Europe, Ukraine, North Africa, south China, Canary Islands, Madeira, North America,[6] Mexico, Colombia, Venezuela, Peru,[7] Costa Rica, Guatemala
Vinca minorL. – central and southeastern Europe, Ukraine, Caucasus; introduced to and established in British Isles, Scandinavia, Portugal, Turkey, south China, North America,[8] New Zealand
Vinca major and V. minor are extensively cultivated as a flowering evergreen ornamental plant. Because the plants are low and spread quickly, they are often used as groundcover in garden landscapes and container gardens. They are also traditionally used in older cemeteries as an evergreen maintenance-free ground cover.[15] Many cultivars are available, with different plant, leaf, and flower colors, sizes, and habits.
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