Vinca major
Template:Short description Template:Speciesbox
Vinca major, with the common names bigleaf periwinkle, large periwinkle, greater periwinkle and blue periwinkle, is a species of flowering plant in the family Apocynaceae, native to the western Mediterranean. Growing to Script error: No such module "convert". tall and spreading indefinitely, it is an evergreen perennial, frequently used in cultivation as groundcover.
Description
Vinca major is a trailing vine, spreading along the ground and rooting along the stems to form dense masses of groundcover individually Script error: No such module "convert". across and up to Script error: No such module "convert". high, perhaps even Script error: No such module "convert"..
The leaves are opposite, nearly orbicular at the base of the stems and lanceolate at the apex, Script error: No such module "convert". long and 2–6 cm broad, glossy dark green with a leathery texture and an entire but distinctly ciliate margin, and a hairy petiole 1–2 cm long.
The flowers are hermaphrodite, axillary and solitary, violet-purple, 3–5 cm in diameter, with a five-lobed corolla. The calyx surrounding the base of the flower is Script error: No such module "convert". long with hairy margins. The flowering period extends from early spring to autumn.
Similar species
The closely related Vinca minor is similar but smaller, with narrower, hairless leaves.
Taxonomy
Subspecies
There are two subspecies, with geographically separate ranges:
- Vinca major subsp. major - leaf petioles finely hairy, hairs short (Southern Europe)
- Vinca major subsp. hirsuta (Boiss.) Stearn (syn. V. pubescens d'Urv.) - leaf petioles densely hairy, hairs longer; petals much narrower (Caucasus, northeastern Turkey)
Etymology
The genus name probably derives from the Latin word Template:Wikt-lang, meaning snip, as the long creeping vines were used to prepare garlands. The Latin specific epithet major means "larger",[1] relative to the similar V. minor.
Distribution and habitat
This species is found in southern Europe and northern Africa, from Spain and southern France east to the western Balkans, and also in northeastern Turkey and the western Caucasus. These are also found in lower Himalayan ranges in Asia.
It prefers moist undergrowth, woodlands, hedgerows and banks along the rivers at an altitude of Script error: No such module "convert". above sea level. It grows well in full sun and in deep shade.
As an invasive plant
Vinca major is an invasive species in temperate parts of the United States, South Africa[2] Australia, and New Zealand. It is especially a common noxious weed 'smothering' native plants and diversity in riparian area and oak woodland habitats of coastal California. It forms dense strands that envelop other plant life and can prevent saplings and shrubs from growing by blocking out the light. Periwinkle moves from place to place, with unintentional human help, in dumped garden waste or as plant fragments carried along in water.[3]
Cultivation
Vinca major is a commonly grown ornamental plant in temperate gardens for its evergreen foliage, spring flowers, and groundcover or vine use.
Many cultivars are available, with differences in flowers, such as white to dark violet flowers, and different patterns and colors of variegated foliage. The cultivar 'Variegata' has gained the Royal Horticultural Society's Award of Garden Merit.[4][5]
It contains the following compounds: vinblastine, vincristine, vindesine and vinorelbine.
Gallery
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Detail of the flower, swelling flower buds and foliage in spring
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Giant steps periwinkle, a variety of Vinca major
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A display of the flower of var. oxyloba
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Note hairy margin of sepals
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Leaves with ciliate margins and a hairy petiole
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'Variegata'
References
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- ↑ Script error: No such module "citation/CS1".
- ↑ [1] Web page managed by the South African Green Industries Council
- ↑ Periwinkle, Aliens Among Us. Virtual Exhibit of the Virtual Museum of Canada.
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Bibliography
- Pignatti S. - Flora d'Italia – Edagricole – 1982, Vol. II, pag. 348
- Flora Europaea: Vinca major distribution
- Blamey, M., & Grey-Wilson, C. (1989). Flora of Britain and Northern Europe. Hodder & Stoughton.
- Huxley, A., ed. (1992). New RHS Dictionary of Gardening 4: 664-665. Macmillan.