Berberis can be deciduous or evergreen shrubs with spiny shoots bearing simple, often spine-toothed leaves, and small yellow or orange flowers in axillary clusters or racemes, followed by small berries
'Atropurpurea Nana' is a deciduous dwarf shrub to 60cm, compact and bushy in habit, with spiny stems bearing purplish-red, obovate leaves, becoming brighter in autumn. Flowers small, pale yellow, followed by deep red berries