Children (5 direct children, 5 direct and indirect children):
Discocactus heptacanthus subsp. catingicola
Discocactus heptacanthus subsp. magnimammus
Discocactus heptacanthus subsp. goiasensis
Discocactus heptacanthus subsp. melanochlorus
Discocactus heptacanthus var. semicampaniflorus