plumbago

Plumbago auriculata, also called Plumbago capensis, Blue plumbago, Cape plumbago or Cape leadwort, is a well known houseplant originally from South Africa.[1][2]

Plumbago auriculata grows fast and to 1.8 meters (6 feet) tall. It has light blue to blue flowers and also variations with white (Plumbago auriculata var. alba) or deep blue (Plumbago auriculata 'Royal cape') flowers. The leaves are green and grow to 5 cm (2 in) long.[2][1]
source: http://en.wikipedia.org/wiki/Plumbago_auriculata