Melocactus violaceus subsp. margaritaceus
Melocactus violaceus subsp. margaritaceus in Bradleya 9: 57. 1991 sec. Zappi & Taylor 2020+1 wfo-0001289794
- =Melocactus pentacentrus, Cact. Gen. Sp. Nov.: 108. 1839 syn. sec. Taylor & Zappi 20042 wfo-0001289725
- =Melocactus ellemeetii in Ned. Kruidk. Arch. 4: 336. 1958 syn. sec. Taylor & Zappi 20043 wfo-0000375375
- –Melocactus margaritaceus, Melocactus Bras.: 76. 1982, nom. inval. syn. sec. Taylor & Zappi 20044 wfo-0000375489
- –Melocactus margaritaceus var. disciformis, Melocactus Bras.: 78. 1982, nom. inval. syn. sec. Taylor & Zappi 20045 wfo-0001432485
- –Melocactus margaritaceus var. salvadorianus, Melocactus Bras.: 78. 1982, nom. inval. syn. sec. Taylor & Zappi 20046 wfo-0001432486