Thelocactus argenteus

Thelocactus bicolor                                                                 

Thelocactus bicolor v.scharzii                                            

Thelocactus bicolor v.texensis                                         

Thelocactus heterochromus

Thelocactus heterochromus v.longispinus

Thelocactus hexadrophorus v.fossulatus                  

Thelocactus lophothele                                                       

Thelocactus rinconensis

Thelocactus sausserii