1b. Carpinus betulus ‘ Incisa ’

C. betulus var. incisa Aiton, Hortus Kewensis 3: 362 (Aiton 1789). – C. betulus f. incisa (Aiton) K.Koch, Dendrologie 2, 2: 3 (Koch 1873). – Type: Kew [cult.], Oct. 1883, s. coll., s.n. (neo-, designated here: K! ex ligneous herb. Mr. G. Nicholson s.n.). – Note: the specimen designated as neotype here is mounted together with another specimen marked as “ C. betulus var. asplenifolia ”.

C. laciniata hort. ex G.Nicholson, The Garden (London 1871–1927) 24: 419 (Nicholson 1883) nom. inval. pro syn. – Note: this variety, better to be treated as a cultivar, has leaves with a lobulate margin, triangular lobes, acute apices, and a shallow dentation.