Thelocactus conothele. 

Thelocactus conothele v. argenteus.

Thelocactus fossulatus

Thelocactus hexaedrophorus var. fossulatus. Syn: Thelocactus fossulatus. 

Thelocactus rinconensis

Thelocactus setispinus

Thelocactus species mix.

Thrixanthocereus blossfeldiorum (Syn: Espostoa blossfeldiorum). 

Thrixanthocereus senilis (SYN: Espostoa senilis). 

Trichocereus boliviensis.

Trichocereus bridgesii (Sunset: 16,17,21-24; USDA: 9-11) Full sun to light shade. Heat tolerant. Low water. Clustering columnar cactus, grows to 8' tall. Hardy to 20°F. Origin: Bolivia.

Trichocereus chilensis (Sunset: 16,17,21-24; USDA: 10-12). Full sun to light shade. Heat tolerant. Low water. Upright cactus, grows to 25' tall. Large white flowers. Hardy to 25°F. Origin: Chile. 

Trichocereus chilensis v. borealis