Ceanothus purpureus, with the common name Napa ceanothus and hollyleaf ceanothus, is a species of shrub in the family Rhamnaceae. It is endemic to northern California, where it is known only from the Inner North Coast Ranges north of the Bay Area, mainly in Sonoma and Napa Counties. The largest remaining population of this shrub occurs on Mt. George near Napa, where it is protected in a botanical preserve.

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