Caryopteris

Caryopteris - C. mastacanthus is a small shrub with greyish foliage, distinct in habit, and with purple flowers, not quite hardy perhaps in all soils, but pretty on warm banks and in warm gardens. There is a white variety. It would group well with the dwarfer shrubs, and in cool districts and on cool soils it will grow against warm walls. On warm soils it would come in well with borders of greyish plants, such as the Lavenders.