Echinocactus fossulatus var. quadrispinus Regel variety synonym

Echinocactus hexaedrophorus var. fossulatus (Scheidw.) Salm-Dyck ex Labour. variety synonym

Echinocactus hexaedrophorus f. major (Quehl) Schelle form synonym

Echinocactus hexaedrophorus f. labouretianus (K.Schum.) Schelle form synonym

Echinocactus hexaedrophorus f. fossulatus (Scheidw.) Voss form synonym

Thelocactus hexaedrophorus var. lloydii (Britton & Rose) Kladiwa & Fittkau variety synonym

Echinocactus hexaedrophorus Lem. species synonym

Thelocactus hexaedrophorus subsp. hexaedrophorus subspecies accepted

Echinocactus insculptus Scheidw. species synonym

Echinocactus hexaedrophorus var. subcostatus Salm-Dyck variety synonym

Echinocactus hexaedrophorus var. major Quehl variety synonym

Echinocactus hexaedrophorus var. labouretianus K.Schum. variety synonym

Echinocactus hexaedrophorus var. fossulatus (Scheidw.) Salm-Dyck variety synonym

Echinocactus hexaedrophorus var. droegeanus Schelle variety synonym

Echinocactus hexaedrophorus var. decipiens A.Berger variety synonym

Echinocactus fossulatus Scheidw. species synonym

Echinocactus droegeanus Hildm. species synonym

Echinofossulocactus hexaedrophorus (Lem.) Lawr. species synonym

Thelocactus lloydii Britton & Rose species synonym

Thelocactus hexaedrophorus var. paradensis Pilbeam variety synonym

Thelocactus hexaedrophorus var. major (Quehl) Y.Itô variety synonym

Thelocactus hexaedrophorus subsp. lloydii (Britton & Rose) N.P.Taylor subspecies accepted

Thelocactus hexaedrophorus var. labouretianus (K.Schum.) Pilbeam variety synonym

Thelocactus hexaedrophorus subsp. kvetae Chvastek & Halda subspecies synonym

Thelocactus hexaedrophorus subsp. jarmilae Halda & Chvastek subspecies synonym

Thelocactus hexaedrophorus subsp. franci Halda & Sladk. subspecies synonym

Thelocactus hexaedrophorus var. fossulatus (Scheidw.) Backeb. variety synonym

Thelocactus hexaedrophorus var. droegeanus (Schelle) Pilbeam variety synonym

Thelocactus hexaedrophorus var. decipiens (Lem.) Pilbeam variety synonym

Thelocactus fossulatus (Scheidw.) Britton & Rose species synonym

Thelocactus hexaedrophorus subsp. lloydii (Britton & Rose) Kladiwa & Fittkau subspecies doubtful