Children (7 direct children, 7 direct and indirect children):
Ferocactus peninsulae var. viscainensis
Ferocactus peninsulae subsp. santa-maria
Ferocactus peninsulae subsp. townsendianus
Ferocactus peninsulae subsp. viscainensis
Ferocactus peninsulae var. coloratus
Ferocactus peninsulae var. gracilis
Ferocactus peninsulae var. townsendianus