Children (7 direct children, 7 direct and indirect children):
Frailea gracillima subsp. gracillima
Frailea gracillima subsp. horstii
Frailea gracillima var. fecotrigensis
Frailea gracillima f. lepida
Frailea gracillima subsp. alacriportana
Frailea gracillima subsp. luteiflora
Frailea gracillima subsp. albifusca