Echinofossulocactus pfeifferi (Zucc.) Lawr. species synonym

Ferocactus pfeifferi (Zucc.) Backeb. species synonym

Echinocactus haematacanthus var. crassispinus Engelm. variety synonym

Echinocactus electracanthus var. rufispinus Müll.Arg. variety synonym

Echinocactus pfeifferi Zucc. ex Pfeiff. species synonym

Echinocactus dietrichianus C.F.Först. species synonym

Echinocactus lancifer Rchb. ex Walp. species heterotypic synonym

Cactus multangularis Moc. & Sessé species homotypic synonym

Cactus multangularis Moc. & Sessé ex DC. species synonym

Bisnaga glaucescens (DC.) Orcutt species accepted

Cactus multiangularis Sessé & Moc. ex DC. species synonym

Echinocactus electracanthus var. haematacanthus Monv. variety homotypic synonym

Cactus multiangularis Sessé & Moc. species homotypic synonym

Echinocactus pfersdorffii Schelle species synonym

Echinocactus oxypterus Zucc. ex Pfeiff. species synonym

Echinocactus melocactiformis DC. species synonym

Echinocactus mammillarioides Hook. species synonym

Echinocactus hystrichacanthus Lem. species synonym

Echinocactus histrix DC. species synonym

Echinocactus haematacanthus (Monv. ex Salm-Dyck) Monv. ex F.A.C.Weber species synonym

Echinocactus glaucescens DC. species synonym

Echinocactus flavispinus Meinsh. species synonym

Echinocactus electracanthus var. haematacanthus Monv. ex Salm-Dyck variety synonym

Echinocactus coulteri G.Don species synonym

Parrycactus glaucescens (DC.) Doweld species synonym

Bisnaga pueblensis Doweld species synonym

Bisnaga histrix (DC.) Doweld species accepted

Bisnaga electracantha (Lem.) Orcutt species synonym

Echinofossulocactus oxypterus (Zucc. ex Pfeiff.) Lawr. species synonym

Ferocactus stainesii var. haematacanthus (Monv. ex Salm-Dyck) Backeb. variety synonym

Echinocactus treculianus Labour. species synonym

Echinocactus theionacanthus Lem. species synonym

Echinocactus theiacanthus Lem. species synonym

Ferocactus melocactiformis (DC.) Britton & Rose species synonym

Ferocactus histrix (DC.) G.E.Linds. species synonym

Ferocactus haematacanthus (Monv. ex Salm-Dyck) Bravo ex Backeb. & F.M.Knuth species synonym

Ferocactus glaucescens (DC.) Britton & Rose species synonym

Echinocactus pycnoxyphus Lem. species synonym

Echinocactus electracanthus Lem. species synonym

Bisnaga hamatacantha (Muehlenpf.) Orcutt species accepted

Bisnaga haematacantha (Monv. ex Salm-Dyck) Doweld species accepted

Pyrrhocactus mammillarioides (Hook.) Backeb. species synonym

Echinocactus flexispinus Engelm. species heterotypic synonym

Malacocarpus mammillarioides (Hook.) Britton & Rose species synonym

Neoporteria subgibbosa var. mammillarioides (Hook.) Donald & G.D.Rowley variety synonym

Neoporteria mammillarioides (Hook.) Backeb. species synonym

Bisnaga haematacantha (Monv. ex Salm-Dyck) Orcutt species synonym

Echinocactus pfeifferi Seitz species synonym

Echinocactus oxypterus Zucc. species homotypic synonym

Ferocactus haematacanthus (Monv. ex Salm-Dyck) Bravo species homotypic synonym