detail uf the flowers of bluebeard or blue spirea

heavenly blue bluebeard spirea mist caryopteris aa clandonensis lamiaceae periwinkle showy fragrant grown grows growing deciduous shrub flowers bloom blooming blossom terminal axillary clusters silverygray leaves borders botany botanical flora floral garden gardening gardener outdoor late summer autumn season seasonal herbaceous daylight shadow nature natural cultivated cultivation ornamental beauty close up vegetable vegetation umbria italy