Taxonomic status: Accepted

homotypic synonyms:
Echinocactus johnsonii Parry ex Engelm.; Ferocactus johnsonii (Parry ex Engelm.) Britton & Rose; Neolloydia johnsonii (Parry ex Engelm.) L.D. Benson; Sclerocactus johnsonii (Parry ex Engelm.) N.P. Taylor; Thelocactus johnsonii (Parry ex Engelm.) W.T.Marshall;

protologue: Calif. Cact. 75: 75 (1935)
URL protologue: https://archive.org/stream/#page/75/mode/2up

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