Typification of names of Clusiaceae based on material collected by August Weberbauer in Peru

August Weberbauer was a German botanist who worked for most of his life in Peru. Many species have been described based on specimens collected by him, which were mainly deposited in the Berlin herbarium (B). After the bombing of the Berlin herbarium during World War II, it was assumed that most of these types had been destroyed, duplicates rarely existed and neotypes had to be designated. However, during visits to Peruvian herbaria we rediscovered some overlooked duplicates of specimens of Clusiaceae. In the present paper, we designate lectotypes of ten names based on these Weberbauer collections and report additional duplicates found in the herbarium G. Some former incorrect typifications are corrected, and the problem of destroyed types in herbarium B, often known mainly from photos made by J. F. Macbride, is briefly discussed.