The genus Sclerocactus, tribe Cacteae, family Cactaceae

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Distribution, checklist of endangering, overview, taxonomy of the genus Sclerocactus Britton & Rose, key of the genus Sclerocactus, of the sections Mesea-Verdae, Parviflori, Sclerocactus, of the species, subspecies, accepted names with synonyms, Isoenzyme analysis, summary of seed morphology, SEM´S of seeds, first descriptions, cultivation and winterhardy aspects, glossary, bibliography, fh - fieldnumbers (updated 2005), herbaria references (documented fh fieldnumber material is in HD, SRP) index of common names, german summary.