Taxon - Links and literature
Eggli, U. & Leuenberger, B. E. (2008): Type specimens of Cactaceae names in the Berlin Herbarium (B) [De herbario berolinensi notulae 48], Willdenowia 38(1), pages 213-280
http://www.bgbm.org/willdenowia/w-pdf/wi...
Families of Flowering Plants [cactacea]
Watson L. , Dallwitz M. J.: Families of Flowering Plants [http://delta-intkey.com/angio]
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