Thelocactus
rinconensis subs. phymatothelos
Thelocephala
Toumeya
Trichocereus
Turbinicarpus
pseudomacrochele v. sphacelatus
schmiedickeanus v. dickinsoniae
schmiedickeanus v. flaviflorus
Uebelmannia
pectinifera v. pseudopectinifera
Weberbauerocereus
Weingartia
Wigginsia
Wilcoxia