Thelocactus

bicolor
bicolor ssp. bolaensis
bicolor ssp. commodus
bicolor v. pottsii
bicolor v. texensis
bicolor v. tricolor
buekii
conothelos
conothelos ssp. argenteus
conothelos ssp. argenteus
conothelos ssp. aurantiacus
ehrenbergii
ehrenbergii
flavidispinus
hastifer
hastifer
hexaedrophorus
hexaedrophorus
hexaedrophorus
krainzianus
lausseri
leucacanthus
lloydii
lloydii
lloydii f. major
macdowellii
macdowellii
matudae
nidulans
panarottoanus
phymatothelos
phymatothelos
saussieri
saussieri
saussieri
saussieri
schwarzii