Periwinkle is a garden plant that escapes from cultivation. In this country, it apparently does not spread by seed -- only by expanding the size of its patch by its creeping stems. Because of this, Vinca growing in a wild area generally marks the site of a former home and garden.
- Family: dogbane (Apocynaceae)
- Habitat: woods, shady roadsides
- Height: 6-8 inches
- Flower size: 3/4 to 1 inch across
- Flower color: blue-purple
- Flowering time: April to May
- Origin: southern Europe