Hamatocactus sinuatus (A.Dietr.) Orcutt in Cactography 6. 1926 Hamatocactus sinuatus (A.Dietr.) Orcutt in Cactography 6. 1926is new combination for Echinocactus sinuatus A.Dietr. in Allg. Gartenzeitung 19(44): 345–346. 1851Taxon for this nameHamatocactus sinuatus (A.Dietr.) Orcutt