Cactus and Succulent Field Number

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Field number : REPP 818
Collector : Werner Reppenhagen
Species : Mammillaria johnstonii   cactuspro.com
Locality : Mexicó : Sonora (San Carlos, 50m)      * Geocode
Date : 11/09/1974
Notes :

Taxonomy of the Cactaceae - Joël Lodé = Mammillaria johnstonii
New Cactus Lexicon - David Hunt = Mammillaria johnstonii

The International Plant Names Index : http://www.ipni.org
Mammillaria (Haworth 1812)
Mammillaria johnstonii ((Britton & Rose) Orcutt 1926)