evergreen shrub mahonia aquifolium oregon-grape, blue fruits and green and red leaves in winter covered by snow

snow green mahonia bush natural nature garden blue foliage season shrub background winter plant purple oregon wild leaves leaf grape park aquifolium flora berberidaceae fruits branch berry beautiful bunch berries bright outdoor day thorn barberry ornamental evergreen colorful organic botany arboretum stem medicine dauricum landscape herbal ecology blooming