periwinkle Apocynaceae Vinca
Leaf: Opposite, evergreen, simple, elliptical to ovate, 1/2 to 1 inch long, entire, shiny dark green, paler mid-vein.
Flower: Attractive, most commonly bluish-purple, some cultivars white, 5 fused petals, 1 inch across, appearing spring.
Fruit: Inconspicuous, small (1 inch) brown, bean-like follicle.
Twig: Slender, green; small green buds; commonly root at the nodes.
Form: Prostrate, trailing, non-climbing vine; forms a dense mat along the ground.