No taxon left behind? - a critical taxonomic checklist of Carpinus and Ostrya (Coryloideae, Betulaceae) Author Holstein, Norbert Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Nordrhein-Westfalen, Germany. & Corresponding author: holstein @ uni-bonn. de Author Weigend, Maximilian Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Nordrhein-Westfalen, Germany. & Email: mweigend @ uni-bonn. de text European Journal of Taxonomy 2017 2017-12-07 375 1 52 journal article 21949 10.5852/ejt.2017.375 c072dbcc-028b-4fa2-a564-8601e0435854 2118-9773 3838542 1i. Carpinus betulusPyramidalis C. betulus var. pyramidalis hort. ex Bean, Trees and Shrubs, Hardy in the British Isles 1: 294 ( Bean 1914 ). – Original citation: “A fine specimen grows in the Solferino Square at Rouen.”. – Type : not localized. – Note: this cultivar has erect branches, but not as slender as those of ‘Columnaris’. Bean does not refer to Dippel (1891) or Winkler (1904) , whose names are superfluous.