Native to (or naturalized in) Oregon:
- Broadleaf evergreen shrub, to 5 ft (1.5 m) tall, stems have longitudinal groves and are red at first then yellow, spines are 3-parted to 4 cm. Leaves alternate, simple, elliptic-oblong, about 8 cm long and 2 cm wide, leathery, margin serrate with up to 6 prominent teeth per side, upper surface dull green, whitish bloom below. Flowers pale yellow, with as many as 25 per in short stalked clusters; petals deeply incised; blooms in late spring. Fruit to 6 mm, ovoid, with a heavy bloom, essentially white.
- Sun to part shade
- Hardy to USDA Zone 6 Native to China, Yunnan.
- pruinosa: a reference to the pruinose underside of leaves; i.e., a waxy, powdery, usually whitish (bloom) surface coating.