Cactus and Succulent Field Number

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Field number : LAU 81
Collector : Alfred Bernhard Lau
Species : Mammillaria gueldemanniana v. guirocobensis  cactuspro.com
Locality : Mexicó : Sonora (Guirocoba , Alamos 800-1000m)      * Geocode
Date : 10/04/1973
Notes :
together with Mammillaria sonorensis, Echinocereus stoloniferus, Echinocereus subinermis

Taxonomy of the Cactaceae - Joël Lodé = Mammillaria sheldonii
New Cactus Lexicon - David Hunt = Mammillaria sheldonii

The International Plant Names Index : http://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria gueldemanniana