Eggli, U. & Leuenberger, B. E.: Type specimens of Cactaceae names in the Berlin Herbarium (B) [De herbario berolinensi notulae 48]. — Willdenowia 38: 213–280. — ISSN 0511-9618; © 2008 BGBM Berlin-Dahlem. doi:10.3372/wi.38.38116 (available via http://dx.doi.org/)
A short history of the Cactaceae holdings of the Berlin herbarium and their fate is provided. While a considerable number of historical spirit specimens have escaped the destruction of the herbarium during World War II, the pre-1943 collection of pressed specimens was lost almost entirely. More than half of the present Cactaceae holdings of B were made on the base of cultivated material. The importance of these “Garden Herbarium” specimens is stressed, especially for succulent plants, where much of the type material, even of recently described taxa, is of insufficient quality or even fragmentary. A complete survey of all extant Cactaceae specimens at B (including the material recently transferred from the former KOELN herbarium) has resulted in a detailed and commented list of type specimens and specimens derived from cultivated descendants of type collections. Nomenclatural and typification problems encountered during this compilation are discussed. A list of photographs preserved at B depicting type material located in other herbaria, is also given. Lectotypes are designated for the names Cereus lamprospermus, C. rhodoleucanthus, C. stenogonus, C. xanthocarpus, Echinocactus umadeave, Echinopsis rhodotricha, Pilocereus setosus, Rebutia steinbachii and Turbinicarpus pseudomacrochele var. lausseri.