Melocactus depressus (Aiton) Hook. species synonym Melocactus melocactoides f. depressus (Hook.) Rizzini form synonym Melocactus violaceus subsp. violaceus subspecies accepted Melocactus melocactoides (Hoffmanns.) DC. species synonym Melocactus margaritaceus Rizzini species synonym Melocactus violaceus subsp. ritteri N.P.Taylor subspecies accepted Melocactus violaceus subsp. natalensis P.J.Braun & Esteves subspecies synonym Melocactus violaceus subsp. margaritaceus N.P.Taylor subspecies accepted Melocactus pentacentrus Lem. species synonym Melocactus parthonii Miq. species synonym Melocactus melocactoides var. violaceus (Pfeiff.) Rizzini variety synonym Melocactus melocactoides f. sanctaritae Rizzini form synonym Melocactus melocactoides f. perspinosus Rizzini form synonym Melocactus melocactoides var. natalensis Rizzini variety synonym Melocactus melocactoides var. itaipuassuensis Rizzini variety synonym Melocactus melocactoides f. exsanguis Rizzini form synonym Melocactus melocactoides var. depressus (Hook.) Rizzini variety synonym Melocactus melocactoides f. capensis Rizzini form synonym Melocactus margaritaceus var. salvadoranus Rizzini variety synonym Melocactus margaritaceus var. disciformis Rizzini variety synonym Melocactus macrodiscus var. minor Ritter variety synonym Melocactus goniodacanthus Lem. species synonym Melocactus ellemeetii Miq. species synonym Cereus meonacanthus Link & Otto ex Steud. species synonym Echinocactus meonacanthus Link & Otto species synonym Echinocactus melocactoides Lem. species synonym Cactus depressus (Aiton) Borg species synonym Cactus meonacanthus Lem. ex Steud. species synonym Cactus melocactoides Hoffmanns. species synonym Cactus melocactus var. depressus Aiton variety synonym Melocactus gardenerianus J.R.Booth ex C.F.Först. species synonym Melocactus melocactoides f. civitatis Rizzini form synonym Melocactus gardenerianus J.R.Booth species homotypic synonym Cactus meonacanthus Lem. species homotypic synonym Cereus meonacanthus Link & Otto species homotypic synonym Melocactus pentacetrus Lem. species synonym |