What is "mahonia aquifolium"

hollygrape \hollygrape\ n. An ornamental evergreen shrub ( Mahonia aquifolium) of the Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries.

Syn: Oregon grape, Oregon holly grape, mountain grape, holly-leaves barberry, Mahonia aquifolium.

Mahonia aquifolium (Oregon-grape or Oregon grape) is a species of flowering plant in the family Berberidaceae, native to western North America. It is an evergreen shrub growing to tall by wide, with pinnate leaves consisting of spiny leaflets, and dense clusters of yellow flowers in early spring, followed by dark bluish-black berries.