Echinocactus foliosus (Gillies ex Loudon) Steud., Nomencl. Bot., ed. 2, 1: 536. 1840 Echinocactus foliosus (Gillies ex Loudon) Steud., Nomencl. Bot., ed. 2, 1: 536. 1840Taxon for this nameEchinocactus foliosus (Gillies ex Loudon) Steud.