Mammillaria carmenae Castañeda Mammillaria carmenae Castañeda in Anales Inst. Biol. Univ. Nac. México 24: 233. 1954 sec. Hunt 2016=Escobariopsis carmenae (Castañeda) Doweld in Sukkulenty 3: 40. 2000 syn. sec. Guzmán & al. 2003