Field number : WK 9
Collector : Wolfgang Krueger
Species : Mammillaria ritteriana 
Locality : Mexicó : Nuevo León (Huasteca Canon) * Geocode
Date : 1975
Notes :
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Taxonomy of the Cactaceae - Joël Lodé = Mammillaria ritteriana
New Cactus Lexicon - David Hunt = Mammillaria formosa subsp. chionocephala
The International Plant Names Index : https://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria ritteriana (Boed. 1929)
http://www.mammillarias.net
Semeurs de cactus
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