Taxonomic status: Unresolved

homotypic synonyms:
Echinocactus pentacanthus Lemaire; Stenocactus pentacanthus (Lemaire) A. Berger ex A.W. Hill;

protologue: Cact. 3: 115 (1922)
URL protologue: https://archive.org/stream/mobot31753002274329#page/115/mode/2up

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