Mahonia aquifolium (tall) is an evergreen shrub with multiple erect, unbranched stems; alternate, pinnately- compound leaves with prickly, holly-like leaflets; and yellow bark, wood, and roots. Short Oregon grape grows to about eight feet tall. Flowers are yellow, clustered, and appear March through June. Fruits are waxy blue berries that appear in grape-like clusters.
Grows in dry to moist, well-drained soils, in sun or shade.
Flowers attract butterflies. Fruits are coveted by birds and mammals.