This grower is sure of this plant identification.
Wonderful show from August until the frosts. good for cutting
Clerodendrum bungei (Glory flower). An upright bushy deciduous suckering shrub native to China and the Himalayas. Leaves are heart-shaped and medium green, smelling rather unpleasant when crushed. The salverform flowers are borne in terminal panicles in shades of red, purple and pink and are pleasantly scented. It will reach 6 ft (1.8 m) unless cut to the ground each spring; new growths will then flower on 3 ft (1 m) stems. It will spread rapidly if not contained or controlled.
Thin out crowded growth in spring. Stems require support. They are fully hardy to frost tender, min 5C and will need humus-rich, well drained soil. Give them a position in full sun with partial shade in the summer. Make sure you water them freely in the growing season, and less at other times.