Children (4 direct children, 4 direct and indirect children):
Mammillaria hahniana bravoae
Mammillaria hahniana subsp. bravoae
Mammillaria hahniana hahniana
Mammillaria hahniana subsp. hahniana
Mammillaria hahniana mendeliana
Mammillaria hahniana subsp. mendeliana
Mammillaria hahniana woodsii
Mammillaria hahniana subsp. woodsii