Cactus and Succulent Field Number

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Field number : SH 52
Collector : Dennis Sargant (plants collected by Alfred Bernhard Lau)
Species : Mammillaria petrophila   cactuspro.com
Locality : Mexicó : Baja California (Sierra de la Laguna 1800m)      * Geocode
Date : 13/11/1972
Notes :
together with Echinocereus pensilis

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

The International Plant Names Index : http://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria petrophila (K.Brandegee 1904)