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Humboldt & Bonpland's Cactaceae in the herbaria at Paris and Berlin

Abstract Leuenberger, B. E.: Humboldt & Bonpland's Cactaceae in the herbaria at Paris and Berlin. — Willdenowia 32: 137–153. 2002. — ISSN 0511-9618. Cactaceae specimens collected by Humboldt & Bonpland in tropical America and kept in the herbaria at Paris and in the Willdenow herbarium at Berlin are listed and discussed. Of the 15 taxa treated by Kunth, in 1823, in “Nova genera et species plantarum”, ten specimens from Venezuela, Colombia, Ecuador and Peru are extant in the Humboldt & Bonpland collection at Paris (P-Bonpl). The general herbarium at Paris contains duplicates of three of these and an additional specimen under a name not treated by Kunth. Of the eight specimens in the Willdenow herbarium at Berlin (B-W) attributed to Humboldt & Bonpland, six belong to taxa described as new by Kunth. Three of these were filed under unpublished names. The specimens and protologues are compared with Humboldt & Bonpland's unpublished field notes (“Journal botanique”). The nature of the material, its identification, and taxonomic and nomenclatural problems are briefly treated and the results summarized in tabular form.