Peniocereus greggii v. transmontanus. USDA: 9-10. Light shade to full sun. Heat resistant. Little water required. Hardy to 20°F. Grayish green trailing stems reaching 10 or more feet, often growing into trees. Strongly scented white flowers. Collected Maricopa county AZ

Pfeiffera gracilis

Pfeiffera ianthothele

Pfeiffera mataralensis

Pilosocereus azulensis

Pilosocereus azureus.

Pilosocereus braunii

Pilosocereus chrysacanthus v rubrispinus.

 Pilosocereus chrysostele. 

Pilosocereus glaucescens. 

Pilosocereus gounellei. USDA: 10-12. Hardy to 30°F. Light shade. Heat resistant. Regular water summer, keep dry during winter domancy. Tree like cactus, up to 14 feet tall  20' tall. Clusters of pink flowers. Origin: Brazil.

Pilosocereus leucocephalus  

Pilosocereus palmeri.