| Frailea alacriportana Backeb. & Voll |
Synonym |
 |
WCSP (in review) |
| Frailea albiareolata Buining & Brederoo |
Unresolved |
 |
WCSP (in review) |
| Frailea albicolumnaris F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea albifusca F.Ritter |
Unresolved |
 |
WCSP (in review) |
| Frailea alexandri Metzing |
Accepted |
 |
WCSP (in review) |
| Frailea altasensis Prestlé |
Accepted |
 |
WCSP (in review) |
| Frailea altigibbera P.J. Braun & Esteves |
Unresolved |
 |
TRO |
| Frailea amerhauseri Prestle |
Unresolved |
 |
TRO |
| Frailea asperispina F.Ritter |
Unresolved |
 |
WCSP (in review) |
| Frailea asterioides Werderm. |
Accepted |
 |
WCSP (in review) |
| Frailea asterioides var. backebergii F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea asterioides var. harmoniana F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea aurea Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea aureinitens Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea aureispina F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea aureispina var. pallidior F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea bruchii Speg. [Unplaced] |
Unresolved |
 |
WCSP (in review) |
| Frailea buenekeri W.R.Abraham |
Accepted |
 |
WCSP (in review) |
| Frailea buenekeri subsp. densispina Hofacker & Herm |
Accepted |
 |
WCSP (in review) |
| Frailea buiningiana Prestlé |
Accepted |
 |
WCSP (in review) |
| Frailea buiningiana f. gracilispina Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea caespitosa (Speg.) Britton & Rose |
Unresolved |
 |
WCSP (in review) |
| Frailea carminifilamentosa Kilian |
Synonym |
 |
WCSP (in review) |
| Frailea carminifilamentosa var. winkelmanniana Kilian ex Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea castanea Backeb. |
Accepted |
 |
WCSP (in review) |
| Frailea castanea subsp. harmoniana (F.Ritter) P.J.Braun & Esteves |
Accepted |
 |
WCSP (in review) |
| Frailea castanea var. perumbilicata (F.Ritter) Prestlé |
Unresolved |
 |
WCSP (in review) |
| Frailea cataphracta (Dams) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea cataphracta var. duchii G.Moser |
Synonym |
 |
WCSP (in review) |
| Frailea cataphracta subsp. duchii (G.Moser) P.J.Braun & Esteves |
Accepted |
 |
WCSP (in review) |
| Frailea cataphracta subsp. melitae (Buining & Brederoo) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea cataphracta var. tuyensis Buining & G.Moser |
Synonym |
 |
WCSP (in review) |
| Frailea cataphracta subsp. tuyensis (Buining & G.Moser) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea cataphractoides Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea chiquitana Cárdenas |
Accepted |
 |
WCSP (in review) |
| Frailea chrysacantha Hrabe |
Synonym |
 |
WCSP (in review) |
| Frailea colombiana (Werderm.) Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea concepcionensis Buining & G.Moser |
Unresolved |
 |
WCSP (in review) |
| Frailea curvispina Buining & Brederoo |
Accepted |
 |
WCSP (in review) |
| Frailea dadakii (Fric) A.Berger |
Synonym |
 |
WCSP (in review) |
| Frailea deminuta Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea densispina (Hofacker & K.Herm) N.Gerloff |
Synonym |
 |
WCSP (in review) |
| Frailea friedrichii Buining & G.Moser |
Accepted |
 |
WCSP (in review) |
| Frailea fulviseta Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea gracillima (Lem.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea gracillima subsp. alacriportana (Backeb. & Voll) N.Gerloff |
Synonym |
 |
WCSP (in review) |
| Frailea gracillima subsp. albifusca (F.Ritter) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea gracillima var. fecotrigensis (Prestlé) Berka |
Synonym |
 |
WCSP (in review) |
| Frailea gracillima subsp. horstii (F.Ritter) P.J.Braun & Esteves |
Accepted |
 |
WCSP (in review) |
| Frailea gracillima f. lepida (Buining & Brederoo) Hofacker & Berka |
Synonym |
 |
WCSP (in review) |
| Frailea grahliana (K.Schum.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea grahliana subsp. moseriana (Buining & Brederoo) Prestlé |
Accepted |
 |
WCSP (in review) |
| Frailea hlineckyana Kervinka |
Synonym |
 |
WCSP (in review) |
| Frailea horstii F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea horstii subsp. fecotrigensis Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea ignacionensis Buining & G.Moser |
Unresolved |
 |
WCSP (in review) |
| Frailea jajoiana Kervinka |
Synonym |
 |
WCSP (in review) |
| Frailea knippeliana (Quehl) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea larae R.Vásquez |
Synonym |
 |
WCSP (in review) |
| Frailea lepida Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea magnifica Buining ex Prestlé [Invalid] |
Synonym |
 |
WCSP (in review) |
| Frailea mammifera Buining & Brederoo |
Accepted |
 |
WCSP (in review) |
| Frailea matoana Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea melitae Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea moseriana Buining & Brederoo |
Synonym |
 |
WCSP (in review) |
| Frailea odieri (Lem. ex Salm-Dyck) Speg. |
Unresolved |
 |
WCSP (in review) |
| Frailea perbella Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea perumbilicata F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea perumbilicata var. spinosior F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea phaeodisca (Speg.) Backeb. & F.M.Knuth |
Accepted |
 |
WCSP (in review) |
| Frailea pseudogracillima F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pseudopulcherrima Y.Itô |
Accepted |
 |
WCSP (in review) |
| Frailea pulcherrima (Arechav.) Speg. |
Synonym |
 |
WCSP (in review) |
| Frailea pullispina Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea pullispina var. atrispina Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea pullispina var. centrispina Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea pumila (Lem.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea pumila subsp. albiareolata (Buining & Brederoo) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pumila subsp. colombiana (Werderm.) Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea pumila subsp. deminuta (Buining & Brederoo) Prestlé |
Accepted |
 |
WCSP (in review) |
| Frailea pumila subsp. hlineckiana (Cervinka) Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea pumila subsp. jajoiana (Cervinka) Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea pumila var. maior F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pumila subsp. maior (F.Ritter) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea (Speg.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea pygmaea subsp. albicolumnaris (F.Ritter) Hofacker |
Accepted |
 |
WCSP (in review) |
| Frailea pygmaea var. altigibbera F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea subsp. altigibbera (F.Ritter) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea subsp. asperispina (F.Ritter) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. atrofusca Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. aurea (Backeb.) Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea subsp. aureinitens (Buining & Brederoo) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. aureinitens (Buining & Brederoo) P.J. Braun & Esteves |
Synonym |
 |
TRO |
| Frailea pygmaea subsp. aureispina (F.Ritter) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. curvispina F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. dadakii (Fric) Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea subsp. fulviseta (Buining & Brederoo) P.J.Braun & Esteves |
Accepted |
 |
WCSP (in review) |
| Frailea pygmaea var. lilalunula F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea subsp. lilalunula (F.Ritter) P.J.Braun & Esteves |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. longispina F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. maior F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. phaeodisca (Speg.) Y.Itô |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. planicosta F.Ritter |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea var. pulcherrima (Arechav.) Prestlé |
Synonym |
 |
WCSP (in review) |
| Frailea pygmaea subsp. tuyensis (Buining & G.Moser) Metzing |
Accepted |
 |
WCSP (in review) |
| Frailea schilinskyana (Haage ex K.Schum.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Frailea schilinzkyana (F. Haage) Britton & Rose |
Accepted |
 |
TRO |
| Frailea schilinzkyana subsp. concepcionensis (Buining & G.Moser) P.J.Braun & Esteves |
Unresolved |
 |
WCSP (in review) |
| Frailea schilinzkyana subsp. matoana (Buining & Brederoo) Berka |
Synonym |
 |
WCSP (in review) |
| Frailea stockingeri Prestlé |
Accepted |
 |
WCSP (in review) |
| Frailea tuyensis (Buining & Moser) P.J. Braun & Esteves |
Synonym |
 |
TRO |
| Frailea uhligiana Backeb. |
Synonym |
 |
WCSP (in review) |
| Frailea ybatense Buining & G.Moser |
Unresolved |
 |
WCSP (in review) |