Taxonomic status: Synonym

homotypic synonyms:
Echinocactus johnsonii Parry ex Engelm.; Echinomastus johnsonii (Parry ex Engelm.) E.M. Baxter; Ferocactus johnsonii (Parry ex Engelm.) Britton & Rose; Neolloydia johnsonii (Parry ex Engelm.) L.D. Benson; Thelocactus johnsonii (Parry ex Engelm.) W.T.Marshall;

protologue: Bradleya 5: 94 (1987)
URL protologue: https://www.cactuspro.com/biblio_fichiers/pdf/Bradleya/Bradleya_1987_O.pdf

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