Field number : STO 9x-1454
Collector : Helmut Amerhauser, Franz Strigl, Hans Till (either together, or separately)
Species : Gymnocalycium riojense v. pipanacoense 
Locality : Argentina :
Date : 1996+
Notes :
spines up to 4cm long
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Taxonomy of the Cactaceae - Joël Lodé = Error : not found in the Database
New Cactus Lexicon - David Hunt = Error : not found in the Database
The International Plant Names Index : https://www.ipni.org
Gymnocalycium (Pfeiffer 1845)
Gymnocalycium riojense
http://www.gymnocalycium.fr
Semeurs de cactus
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