An important food source for many birds and animals, the native California blackberry is a spreading vine shrub with prickly stems. It produces white flowers and edible berries. The flower petals are narrower than other non-native blackberries.
The California blackberry is native to the western United States and is found in California, Washington, Oregon, Idaho, and Montana. The petals of the flowers are narrower than many other Rubus species and help distinguish it in the field.