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.

Pilosocereus piauhyensis.

Pilosocereus species mix

Polaskia chende. (Synonyms: Myrtillocactus chende, Cereus chende, Cereus delmoralii, Heliabravoa chende, Lemaireocereus chende) 

Polaskia chichipe. 

Pyrrhocactus andicolus

Pyrrhocactus andraeanus

Pyrrhocactus choapensis USDA: 9b-11. Full sun. Hardy to 28° F. Full sun to light shade. Needs good drainage. Origin: Mexico. Synonym: Eriosyce curvispina var. choapensis, Horridocactus choapensis, Neoporteria choapensis

Pyrrhocactus curvispinus v Alicahue

Pyrrhocactus curvispinus v cambarbalensis