Native to (or naturalized in) Oregon:
- Deciduous shrub, 3-6+ ft (0.9-1.8 m), very dense, rounded form; thorny; single spines, not parted, usually 1-1.5 mm long. Leaves alternate, but appear in clusters, simple, obovate to spatulate-oblong, small, 1.3-3.2 cm long, variable in size, narrow base, margin entire. Flowers yellowish, about 1 cm wide, on a long pedicel. Fruit small (8 mm), red, ellipsoid, persisting into winter.
- Sun to part shade, drought tolerant, very adaptable, but does not withstand extremely moist conditions.
Many cultivars, including:
- Green, standard size, and popular dwarf forms such as:
- Yellowish-green ("golden") types include:
- ‘Silver Beauty’ (‘Argenteo-marginata’).
- Purple or red leaf forms are classified as Berberis thunbergii var. atropurpurea (or similar, Berberis thunbergii f. atropurpurea).
- Hardy to USDA Zone 4 Native to Japan.