Berberis (Mahonia) aquifolium
2. Shiny holly-like leaves with 5-11 prickly pinnate leaflets.
3. May grow to six feet. Purple berries in summer.
2. Yellow dye is made from dried roots.
3. Dried bark or roots used as herbal medication for stomach aches, coughs, and as a laxative.
4. Common northwest garden ornamental.