Cactus and Succulent Field Number

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Field number : SH 33
Collector : Dennis Sargant (plants collected by Alfred Bernhard Lau)
Species : Mammillaria dioica f. ?  cactuspro.com
Locality : Mexicó : Baja California (Isla Cedros , Punta Norte)      * Geocode
Date : 20/10/1972
Notes :
together with Ferocactus chrysacanthus, Mammillaria pondii and Echinocereus maritimus Mammillaria goodrichii v. rectispina

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

The International Plant Names Index : http://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria dioica (K.Brandegee 1897)