Whoever dart might be he39s lucky to possess this red lady berberis thunbergii f atropurpurea 39dart39s red lady39 is among the finest varieties of japanese barberry as evidenced by its well deserved rhs agm the hardy shrub spreads beautifully to create a blanket of colour throughout the season beginning when its deep purple deciduous leaves appear this foliage sprouts delicate yellow flowers along the lengths of its stems in march and april followed by contrasting crimson