Paeonia Tree (Tree Peony) suffruticosa 'Renkaku' - Degroot
Renkaku' Tree Peony | Steven Severinghaus | Flickr
Tree Peony Renkaku (aka Flight of Cranes) - Halifax Perennials
Lurie Garden - Tree peony (Paeonia suffruticosa 'Renkaku') blooming at Lurie Garden, May 2016. In this image the shrub form of the plant is clearly seen. | Facebook