Cistus ladanifer ‘Paladin’ is a frost-hardy evergreen shrub suitable for sunny mixed or shrub borders, which bears solitary white flowers, marked with a dark red blotch on each petal in the summer. It has mid-dark green upper leaves and grey-green beneath. Plant in poor to moderately fertile, well-drained soil in full sun. Will tolerate all, but very chalky soils.
The pic is of Cistus ladanifer, which is extremely similar to Paladin.