ツルニチニチソウ 蔓日々草
[b][i]Vinca[/i][/b], commonly called periwinkle, is a genus of low-growing [[flower]]ing plants in the family [i]Apocynaceae[/i]. Two of the most commonly cultivated species are [i]Vinca major[/i] (greater periwinkle) and [i]Vinca minor[/i] (lesser periwinkle), which differ mainly in size. It is often used as an ornamental ground cover.

Periwinkle flowers are tubular, consisting of five distinctive pinwheel-like petals with blunt, broad tips; the center of the flower has a prominent star to pentagon shape. The color of the flowers usually varies between blue and purple; occasionally white. The leaves are elliptic (oval to lance-shaped).

h4. Examples
* !asset #23820874: [i]Vinca minor[/i]
* !asset #23820861: [i]Vinca minor[/i]
* !asset #23820768: [i]Vinca major[/i]
* !post #4786427

h4. Other Apocynaceae species
* [[Catharanthus (flower)|]]
* [[Golden trumpet]]
* [[Oleander]]
* [[Plumeria]]
* [[Tweedia]]

h4. External links
* "Wikipedia: Vinca":https://en.wikipedia.org/wiki/Vinca
* "Wikipedia: Vinca minor":https://en.wikipedia.org/wiki/Vinca_minor 
* "Wikipedia: Vinca major":https://en.wikipedia.org/wiki/Vinca_major
* "Wikipedia: Apocynaceae":https://en.wikipedia.org/wiki/Apocynaceae
periwinkle (flower)