Field number : L 20
Collector : Alfred Bernhard Lau
Species : Mammillaria fraileana f. 
Locality : Mexicó : Baja California (Loreto , San Francisquito 1-30m) * Geocode
Date : 13/11/1972
Notes :
together with L19, L21, Ferocactus townsendianus and Mammillaria poselgeri
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Taxonomy of the Cactaceae - Joël Lodé = Mammillaria albicans subsp. fraileana
New Cactus Lexicon - David Hunt = Error : not found in the Database
The International Plant Names Index : https://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria fraileana
http://www.mammillarias.net
Semeurs de cactus
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