Ceanothus impressus is a species of shrub in the family Rhamnaceae known by the common name Santa Barbara ceanothus.[1] [2] It is endemic to the Central Coast of California, where it is known from San Luis Obispo and Santa Barbara Counties.[3] It occurs in chaparral habitat.[1]
This is an upright shrub with a dense or open form, reaching up to 3 meters in height. The evergreen leaves are about 2 centimeters long and oval shaped, highly ridged and wrinkled and curling under along the edges. They may be gland-dotted and have grayish hairy undersides. The shrub flowers abundantly in inflorescences of small blue flowers. The fruit is a crested spherical capsule about 4 millimeters wide.[3] [4]
There are two varieties:[3]