Ceanothus thyrsiflorus ‘Skylark’

Ceanothus thyrsiflorus, known as blueblossom or blue blossom ceanothus, is an evergreen shrub in the buckthorn family Rhamnaceae that is native to Oregon and California in the western United States and the state of Baja California in northwestern Mexico. The terms 'Californian lilac' and 'Mountain lilac' are also applied to this and other varieties of ceanothus, though it is not closely related to Syringa, the true lilac.