Field number : L 694
Collector : Alfred Bernhard Lau
Species : Mammillaria cowperae 
Locality : Mexicó : Zacatecas (Hornilos near Fresnillo 2300m) * Geocode
Date : 26/05/1974
Notes :
together with Mamillaria zacatecasensis, Echinofossulocactus zacatecasensis
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Taxonomy of the Cactaceae - Joël Lodé = Mammillaria moelleriana
New Cactus Lexicon - David Hunt = Error : not found in the Database
The International Plant Names Index : https://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria cowperae
http://www.mammillarias.net
Semeurs de cactus
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