Berberidaceae
Mahonia aquifolium

Shining Oregon-Grape

Woody shrub with upright to spreading stems. Stems have yellow inner bark. Leaves alternate on stem, 3–10 in. long, pinnately divided, 5–9 leaflets held along central stalk. Leaflets holly-like, leathery, shiny on upper side, dull underneath, 1–3 in. long, with a single central vein, edged with 12–29 very sharply pointed spines. Flowers bright yellow, in dense clusters at stem ends. Berries edible, dark blue, egg-shaped to round, covered with whitish waxy powder. Grows in oak woodlands, forests to sagebrush slopes, below 7000 ft. State flower of Oregon.

  • Rarity: Common
  • Flowering Time: All Spring
  • Life Cycle: Perennial
  • Height: 1--4 feet
  • Habitat: Coastal, West-Side Forest, East-Side Forest, Disturbed
  • Found In: Siskiyous, West Gorge, Mt. Rainier NP, Olympic NP, N Cascades NP
  • Native: Yes