Vinca is a small Old World genus of flowering plants in the family Apocynaceae (order Gentianales), commonly known as periwinkles. The genus comprises subshrubs and herbaceous perennials native to Europe, northwest Africa, and southwest Asia, with slender trailing stems that reach 1–2 metres in length but rarely exceed 70 cm in height. The stems readily root where they contact the ground, allowing individual plants to spread broadly. Leaves are opposite, simple, and broadly lanceolate to ovate; they are evergreen in most species but deciduous in the herbaceous V. herbacea, which dies back to the rootstock each winter.
The showy flowers are produced through most of the growing season. They are salverform — resembling those of Phlox — with five petals, typically violet though occasionally white, united at the base into a narrow tube, and 2.5–7 cm across. The fruit consists of a pair of divergent follicles that split along a single suture to release seeds.
The most widespread species is Vinca minor (lesser periwinkle), a low groundcover of central and southeastern Europe now naturalised across temperate regions worldwide. Vinca major (greater periwinkle) is similarly cultivated and has become invasive in parts of Australia, New Zealand, the British Isles, and coastal California, where dense mats suppress native vegetation. Both species are extensively grown as flowering evergreen groundcovers in garden landscapes, container plantings, and cemeteries.
The genus is notable for its alkaloid chemistry: at least 86 alkaloids have been isolated from Vinca species. Vincamine, derived from V. minor, is used as a nootropic agent. The chemotherapy drugs vincristine and vinblastine — widely used against leukaemias, lymphomas, and other cancers — share the same alkaloid scaffold and are extracted from the closely related genus Catharanthus roseus; the semi-synthetic derivative vinorelbine is used to treat non-small-cell lung cancer.
Etymology
The genus name Vinca derives from the Latin vincire, meaning "to bind" or "to fetter," an allusion to the plant's long trailing stems that spread across the ground. The common name periwinkle is shared with the related genus Catharanthus and, unrelated, with the marine mollusc Littorina littorea.
Distribution
Vinca is native to Europe, northwest Africa, and southwest Asia. Vinca major and V. minor have been widely introduced beyond this native range and are now naturalized in New Zealand, Australia, the British Isles, central and northern Europe, North America, and parts of South America and East Asia. The remaining species — including V. erecta, V. herbacea, V. ispartensis, and V. soneri — have narrower ranges centred on the Mediterranean basin, the Caucasus, Central Asia, and Turkey.
Ecology
Vinca major and V. minor are considered invasive species in several regions where they have been introduced. Their ability to spread rapidly by stem-rooting enables dense, persistent mats that exclude native ground-layer plants and alter local habitat structure. Affected regions include parts of Australia, New Zealand, Canada, and the United States, with coastal California particularly affected.
Cultivation
Vinca major and V. minor are among the most widely cultivated flowering groundcovers in temperate horticulture. Both species are low-growing and spread quickly, making them popular for weed suppression in garden beds, slopes, and container plantings. Numerous cultivars are available offering variation in flower colour (violet, white, blue), leaf variegation, and growth habit. They have a long history of use in cemeteries as hardy, low-maintenance evergreen covers.
Cultural Uses
Vinca species have been used medicinally for centuries. The genus contains at least 86 alkaloids; vincamine, extracted from V. minor, is used as a nootropic and cerebrovascular agent. The related alkaloids vincristine and vinblastine (derived from Catharanthus roseus, formerly placed in Vinca) are important chemotherapy drugs used to treat leukaemias, lymphomas, and other cancers. The semi-synthetic vinorelbine, prepared from natural vinca alkaloids, is used against non-small-cell lung cancer.
