abstract: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 black berries.
Any ofvarious evergreenshrubsof the genusMahonia, especially M. aquifolium of northwestNorth America, having compound leaveswith spiny-toothedleafletsandblackberrieswithbluebloom.