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Bright carmine pink flowers organised in upright clusters from the end of June to August. Very dense panicles that can reach 15 to 20 cm long. They stay light thanks to the numerous thin and prominent stamens. Serrated leaves of 5 to 8 cm long with a spear shape. Slightly downy on their upper side, they turn green-grey in summer. Its reddish-brown shoots turn grey in 3 years. It quickly takes the shape of an upright and dense shrub, and gradually spreads thanks to shoots emerging from the ground or suckers. Work of the nurseryman Billiard de Fontenay aux roses near Paris, specialist of spireas.