Thelocactus bicolor
by Massimiliano Mazzinghi
Thelocactus macdowellii
by David Traish
Thelocactus macdowellii
by David Traish
Thelocactus rinconensis subsp. phymatothele
by David Traish
Thelocactus rinconensis subsp. phymatothele
by David Traish
Thelocactus saussieri
by David Traish