Native to (or naturalized in) Oregon:
- Evergreen shrub, 3-5 ft (0.9-1.5 m), arching stiffly, very thorny 3-parted spines, 1.3-2.0 cm long. Leaves alternate, simple, elliptic to ovate-lanceolate, tapering at both ends, leathery, lustrous green above and silver (glaucous) below, margins recurved and remotely spiny-toothed, purplish-green in winter. Flowers small; fruit small (8 mm), blue-black, and rod-shaped. Stems supposedly "warty" (verrucose), i.e. with rounded, more or less identical raised spots (Krüssmann, 1976).
- Shade or part shade. Any garden soil.
- Hardy to USDA Zone (5)6 Native to western China
- Oregon State Univ. campus: west of Milam Hall.