Of course, we first thought of toyon Heteromeles arbutifolia, a large shrub or small tree that's also called Christmasberry or California holly - the "holly" in Hollywood.    From Wordnik.com.  [SFGate: Top News Stories] Reference

Other common species are Christmasberry, California scrub oak, mountain mahogany, and many species of ceanothus.    From Wordnik.com.  [California Coastal Range Open Woodland-Shrub-Coniferous Forest - Meadow Province (Bailey)] Reference

Christmasberry.    From Wordnik.com.  [Beard] Reference