Cactus caesius (H.L.Wendl.) Britton & Rose species synonym

Cactus ruestii (K.Schum.) Britton & Rose species synonym

Cactus maxonii Rose species synonym

Cactus salvador (L.Murillo) Britton & Rose species synonym

Cactus obtusipetalus (Lem.) Britton & Rose species synonym

Melocactus rubens Miq. species heterotypic synonym

Melocactus caesius subsp. lobelii (Valck.Sur.) Guiggi subspecies synonym

Melocactus monvilleanus Miq. species synonym

Melocactus ruestii K.Schum. species synonym

Melocactus obtusipetalus Lem. species synonym

Melocactus maxonii (Gürke) Gürke species synonym

Melocactus koolwijkianus Valck.Sur. species synonym

Melocactus dawsonii Bravo species synonym

Melocactus curvispinus subsp. curvispinus subspecies accepted

Melocactus argenteus Valck.Sur. species synonym

Cactus oaxacensis Britton & Rose species synonym

Melocactus uncinatus Valck.Sur. species synonym

Melocactus salvador L.Murillo species synonym

Melocactus rustii K.Schum. species synonym

Melocactus ruestii subsp. sanctae-rosae (L.D.Gómez) Elizondo subspecies synonym

Melocactus ruestii subsp. oaxacensis (Britton & Rose) Elizondo subspecies synonym

Melocactus ruestii subsp. maxonii (Rose) Elizondo subspecies synonym

Melocactus ruestii subsp. cintalapensis Elizondo subspecies synonym

Melocactus ruestii subsp. centalapensis Elizondo subspecies synonym

Melocactus roseus Valck.Sur. species synonym

Melocactus radiatus Valck.Sur. species synonym

Melocactus obtusipetalus var. crassicostatus (Lem.) Lem. ex Miq. variety synonym

Melocactus oaxacensis (Britton & Rose) Backeb. species synonym

Melocactus nanus Valck.Sur. species synonym

Melocactus guitartii León species synonym

Melocactus maxonii var. sanctae-rosae L.D.Gómez variety synonym

Melocactus martialis Valck.Sur. species synonym

Melocactus loboguerreroi Cárdenas species synonym

Melocactus lobelii Valck.Sur. species synonym

Melocactus koolwijkianus f. quadrispina Valck.Sur. form synonym

Melocactus koolwijkianus f. plurispina Valck.Sur. form synonym

Melocactus koolwijkianus var. adustus Valck.Sur. variety synonym

Melocactus jakusii Z.Mészáros species synonym

Melocactus humilis Valck.Sur. species synonym

Melocactus holguinensis Areces species synonym

Melocactus guatemalensis Gürke & Eichlam species synonym

Melocactus griseus H.L.Wendl. ex Miq. species synonym

Melocactus delessertianus Lem. ex Labour. species synonym

Melocactus dawsonii subsp. dawsonii subspecies synonym

Melocactus curvispinus subsp. saravianus Fern.Alonso & Xhonneux subspecies synonym

Melocactus curvispinus subsp. obtusipetalus (Lem.) Xhonneux & Fern.Alonso subspecies synonym

Melocactus curvispinus subsp. loboguerreroi (Cárdenas) Fern.Alonso & Xhonneux subspecies synonym

Melocactus curvispinus f. lobelii (Valck.Sur.) N.P.Taylor form synonym

Melocactus curvispinus subsp. koolwijkianus (Valck.Sur.) G.Thomson subspecies accepted

Melocactus curvispinus subsp. dawsonii (Bravo) N.P.Taylor subspecies accepted

Melocactus curvispinus subsp. cucutensis Xhonneux & Fern.Alonso subspecies synonym

Melocactus curvispinus f. caesius (H.L.Wendl.) N.P.Taylor form synonym

Melocactus crassicostatus Lem. species synonym

Melocactus compactus Valck.Sur. species synonym

Melocactus cephalenoplus Lem. species synonym

Melocactus caesius H.L.Wendl. ex Miq. species synonym

Melocactus brongnartii Hildm. species synonym

Melocactus armatus Valck.Sur. species synonym

Melocactus argenteus var. tenuispina Valck.Sur. variety synonym

Melocactus appropinquatus Valck.Sur. species synonym

Melocactus amoenus Hoffmanns. species synonym

Melocactus caesius var. griseus (H.L.Wendl. ex Miq.) C.F.Först. variety synonym

Melocactus curvispinus subsp. guitarti (León) Lodé subspecies synonym

Melocactus caesius H.L.Wendl. species synonym

Melocactus griseus H.L.Wendl. species homotypic synonym

Melocactus obtusipetalus var. crassicostatus (Lem.) Lem. variety homotypic synonym

Melocactus curvispinus subsp. lobelii (Valck.Sur.) Fern.Alonso & Xhonneux subspecies accepted

Melocactus curvispinus subsp. caesius (H.L.Wendl.) N.P.Taylor subspecies accepted