Field number : WM 6642
Collector : Wendell (Woody) Minnich
Species : Mammillaria johnstonii 
Locality : San Carlos Bay, Sonora, Mexicó
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Taxonomy of the Cactaceae - Joël Lodé = Mammillaria johnstonii
New Cactus Lexicon - David Hunt = Mammillaria johnstonii
The International Plant Names Index : https://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria johnstonii ((Britton & Rose) Orcutt 1926)
http://www.mammillarias.net
Semeurs de cactus
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