1f. Carpinus betulus ‘ Purpurea ’

C. betulus f. purpurea K.Koch, Dendrologie 2 (2): 3 (Koch 1873). – C. betulus var. purpurea (K.Koch) G.Nicholson, The Garden (London 1871–1927) 24: 419 (Nicholson 1883). – Original citation: No detailed data given. – Type: not localized. – Note: this is a cultivar with initially brownish-red leaves that turn greenish soon after. Nicholson does not refer to Koch, but intended to describe the same cultivar, therefore Art. 41.4 (McNeill et al. 2012) applies.