Purple Ninebark or Physocarpus opulifolius. Cultivar Monlo with dark purple leaves and white flowers. General view of flowering plant in garden Stock Photo | Adobe Stock
Physocarpus opulifolius 'Diabolo'. Ninebark 'Diabolo' also known as Physocarpus opulifolius 'Monlo'. Colourful foliage, late Spring Stock Photo - Alamy