Field number : STO 96-1053/
Collector : Helmut Amerhauser, Franz Strigl, Hans Till (either together, or separately)
Species : Gymnocalycium ritterianum 
Locality : Sierra Virgo to Sierra Sanagasta, La Rioja, Argentina
Date : 19/06/09
Notes :
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Taxonomy of the Cactaceae - Joël Lodé = Gymnocalycium ritterianum
New Cactus Lexicon - David Hunt = Gymnocalycium ritterianum
The International Plant Names Index : https://www.ipni.org
Gymnocalycium (Pfeiffer 1845)
Gymnocalycium ritterianum (Rausch 1972)
http://www.gymnocalycium.fr
Semeurs de cactus
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