Field number : ML 743A
Collector : Michel Lacoste
Species : Mammillaria grahamii 
Locality : Tanque Verde Canyon, East of Tucson, Pima County, Arizona, USA 870m
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Taxonomy of the Cactaceae - Joël Lodé = Mammillaria grahamii
New Cactus Lexicon - David Hunt = Mammillaria grahamii
The International Plant Names Index : https://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria grahamii (Engelmann 1856)
http://www.mammillarias.net
Semeurs de cactus
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