Berberis pinnata subsp. insularis
Aliso 2: 230. 1950
Shrubs, self-supporting or clambering, 1-7 m. Leaflets thin and flexible; lateral leaflet blades lance-oblong or elliptic, margins plane or weakly undulate, marginal teeth tipped with spines to 1-1.6 × 0.1-0.2 mm. Inflorescences 6-9 cm.
Phenology: Flowering winter (Mar).
Habitat: In shade beneath trees, pine and pine-oak forest
Elevation: 100-450 m
Of conservation concern.
Berberis pinnata subsp. insularis is endemic to the Channel Islands. Specimens of B. pinnata from the coast north of Santa Barbara often show some characteristics of subsp. insularis.