Facheiroa cephaliomelana subsp. cephaliomelana Buining & Brederoo 1975
Facheiroa cephaliomelana subsp. estevesii (Braun) Taylor & Zappi 1997
Facheiroa squamosa (Guerke) Braun 1989
Facheiroa ulei (Guerke) Werdermann 1933
Ferocactus alamosanus subsp. alamosanus (Britton & Rose) Britton & Rose 1922
Ferocactus alamosanus subsp. reppenhagenii (Unger) Taylor 1998
Ferocactus chrysacanthus subsp. chrysacanthus (Orcutt) Britton & Rose 1922
Ferocactus chrysacanthus subsp. grandiflorus (Lindsay) Taylor 1998
Ferocactus cylindraceus subsp. cylindraceus (Engelmann) Orcutt 1926
Ferocactus cylindraceus subsp. eastwoodiae (Benson) Taylor 2002
Ferocactus cylindraceus subsp. lecontei (Engelmann) Taylor 1998
Ferocactus cylindraceus subsp. tortulispinus (Gates) Taylor 1998
Ferocactus diguetii (Weber) Britton & Rose 1922
Ferocactus echidne (De Candolle) Britton & Rose 1922
Ferocactus emoryi subsp. emoryi (Engelmann) Orcutt 1926
Ferocactus emoryi subsp. covillei (Britton & Rose) Hunt & Dmt 2005
Ferocactus emoryi subsp. rectispinus (Coulter) Taylor 1998
Ferocactus flavovirens (Scheidweiler) Britton & Rose 1922
Ferocactus fordii subsp. fordii (Orcutt) Britton & Rose 1922
Ferocactus fordii subsp. borealis Taylor 2002
Ferocactus glaucescens (De Candolle) Britton & Rose 1922
Ferocactus gracilis subsp. gracilis (Gates) 1933
Ferocactus gracilis subsp. coloratus (Gates) Taylor 1998
Ferocactus gracilis subsp. gatesii (Lindsay) Taylor 1998
Ferocactus haematacanthus (Salm-Dyck) Backeberg & Knuth 1936
F. hamatacanthus subsp. hamatacanthus (Muehlenpfordt) Britton & Rose 1922
Ferocactus hamatacanthus subsp. sinuatus (Dietrich) Taylor 1998
Ferocactus herrerae (González Ortega) 1927
Ferocactus histrix (De Candolle) Lindsay 1955
Ferocactus johnstonianus Britton & Rose 1923
Ferocactus latispinus subsp. latispinus (Haworth) Britton & Rose 1922
Ferocactus latispinus subsp. greenwoodii (Glass) Taylor 2005
Ferocactus latispinus subsp. spiralis (Pfeiffer) Taylor 1998
Ferocactus lindsayi Bravo 1966
Ferocactus macrodiscus subsp. macrodiscus (Martius) Britton & Rose 1922
Ferocactus macrodiscus subsp. septentrionalis (Meyran) Taylor 1998
Ferocactus peninsulae (Weber) Britton & Rose 1922
Ferocactus pilosus (Salm-Dyck) Werdermann 1933
Ferocactus pottsii (Salm-Dyck) Backeberg 1961
Ferocactus robustus (Pfeiffer) Britton & Rose 1922
Ferocactus santa-maria Britton & Rose 1922
Ferocactus schwarzii Lindsay 1955
Ferocactus tiburonensis (Lindsay) Backeberg 1961
Ferocactus townsendianus Britton & Rose 1922
Ferocactus viridescens (Torrey & Gray) Britton & Rose 1922
Ferocactus wislizeni (Engelmann) Britton & Rose 1922
Frailea buenekeri subsp. buenekeri Abraham 1990
Frailea buenekeri subsp. densispina Hofacker & Herm 1997
Frailea castanea Backeberg 1936
Frailea cataphracta (Dams) Britton & Rose 1922
Frailea chiquitana (Cárdenas) 1951
Frailea curvispina Buining & Brederoo1972
Frailea fulviseta Buining & Brederoo 1973
Frailea gracillima subsp. gracillima (Lemaire) Britton & Rose 1922
Frailea gracillima subsp. horstii (Ritter) Braun & Esteves 1995
Frailea mammifera subsp. mammifera Buining & Brederoo1972
Frailea mammifera subsp. angelesiae Kiesling & Metzing 2006
Frailea phaeodisca (Spegazzini) Spegazzini 1923
Frailea pumila (Lemaire) Britton & Rose 1922
Frailea pygmaea subsp. pygmaea (Spegazzini) Britton & Rose 1922
Frailea pygmaea subsp. albicolumnaris (Ritter) Hofacker 1998
Frailea pygmaea subsp. tuyensis (Buining & Moser) Metzing 2006
Frailea schilinzkyana subsp. schilinzkyana (Karl Schumann) Britton & Rose 1922
F. schilinzkyana subsp. concepcionensis (Buining & Moser) Braun & Esteves 1995
