Vinca minor

Vinca minor (Lesser Periwinkle) is a plant native to central and southern Europe, from Portugal and France north to the Netherlands and the Baltic States, and east to the Caucasus, and also in southwestern Asia in Turkey.

Additional recommended knowledge

What is the Correct Way to Check Repeatability in Balances?

Recognize and detect the effects of electrostatic charges on your balance

What is the Sensitivity of my Balance?

  It is a trailing subshrub, spreading along the ground and rooting along the stems to form large clonal colonies and occasionally scrambling up to 40 cm high but never twining or climbing. The leaves are evergreen, opposite, 2-4.5 cm long and 1-2.5 cm broad, glossy dark green with a leathery texture and an entire margin. The flowers are solitary in the leaf axils and are produced mainly from early spring to mid summer but with a few flowers still produced into the autumn; they are violet-purple (pale purple or white in some cultivated selections), 2-3 cm diameter, with a five-lobed corolla. The fruit is a pair of follicles 2.5 cm long, containing numerous seeds.

The closely related species Vinca major is similar but larger in all parts, and with relatively broader leaves with a hairy margin.

Cultivation and uses

  The species is commonly grown as a groundcover in temperate gardens for its evergreen foliage, spring and summer flowers, ease of culture, and dense habit that smothers most weeds. The species has few pests or diseases outside it native range and is widely naturalised and classified as an invasive species in parts of North America [1]. There are numerous cultivars, with different flower colours and variegated foliage, including 'Argenteovariegata' (white leaf edges), 'Aureovariegata' (yellow leaf edges), 'Gertrude Jekyll' (white flowers), and 'Plena' (double flowers).

Other vernacular names used in cultivation include Small Periwinkle, Common Periwinkle, and sometimes in the United States, Myrtle or Creeping Myrtle (as a result of confusion with the unrelated myrtles [2]).

• Ethnomedically, the dried leaves, aerial parts, and in some cases the entire plant of Vinca, are used to enhance blood circulation, including that of the brain, enhance metabolism in the brain, and to treat cardiovascular disorders.

Vincamine is the pharmaceutical molecule responsible for Vinca's nootropic activity.

References

• Flora Europaea: Vinca minor distribution
• Morphology and ecology of Vinca minor (in Spanish)
• Borealforest: Vinca minor
• Vinca minor (from Ohio State University's Pocket Gardener)
• Common Periwinkle (as an invasive species; includes photos)
• Blamey, M., & Grey-Wilson, C. (1989). Flora of Britain and Northern Europe. Hodder & Stoughton.
• Huxley, A., ed. (1992). New RHS Dictionary of Gardening 4: 665. Macmillan.