Romneya coulteri

Although it dies down in winter, it creates a shrub-like effect in summer with many upright, branching stems clothed in glaucous-grey leaves, topped with fat buds, which open huge white poppies, 15 cm across, with crumpled tissue-paper-like petals pinned together with a mass of yellow stamens. Best in a warm, sunny sheltered position. The woody base will travel and young shoots will pop up some distance away so allow space. It resents disturbance.