Personal ideas about the application of the International Rules of Nomenclature, or, as with the Rules themselves, International deliberation? II. Some denominations of Dicotyledonous Trees and Shrubs species. With a Retrospection and a set of Propositions on the Nomenclature-Rules

This second Part has its origin principally in Dr. ALFRED REHDER’S “Manual of Cultivated Trees and Shrubs” 1927. That admirable work contains several revolutionary looking changes of names, which changes partly were already propagated in BAILEY’S works of the last years; and I have made a study of those names, beside others. The result is that I cannot in many cases join with REHDER’S new-old names and principles. But when I therefore criticise in all those cases REHDER’S opinion, the reader must not think thereby that I criticise REHDER’S work as a whole. I criticise the names and principles only because I think that these changes and principles are unfavourable with respect to the world’s effort to obtain unity of plantnomenclature; and I don’t think about criticizing the work as a whole. REHDER’S “Manual” is the result of long and arduous work; it is in its relative size the most complete, the sharpest as to the characters, the newest and most usable of all Dendrological works existing. No Dendrologist, even no Botanist, who has to do with Trees and Shrubs, can do without it.