Carnegia gigantea (Saguaro). Sunset: 11-13,18-21; USDA: 9-10. Full sun. Heat tolerant. Little water. Hardy to 15°F. Grows to 50' tall. Origin: Sonoran desert of southwestern USA and Northern Mexico.

Corryocactus melanotrichus (Clustering cereus). USDA zone: 10-11. Full sun to part sun. Heat tolerant. Little water. Hardy to 30F. Grows to 8' tall. Native to Bolivia.

Lophocereus schottii (Senita). Organ pipe cactus. Sunset: 12-13, 16, 17, 21-24; USDA: 9-11. Full sun. Heat tolerant. Little water. Hardy to 18°F. Branching cactus, each stem can grow to 28' tall, 10" diameter. Small white flowers. Origin: AZ, northwest Mexico

Lophocereus schottii 'mieckleyanus' (Thin senita form). Organ pipe cactus. Sunset: 12-13,16,17,21-24; USDA: 9-11. Full sun. Heat tolerant. Little water. Hardy to 18°F. Each stem can grow to 20' tall, 4-6" diameter. Origin: Arizona, northwestern Mexico.

Lophocereus schottii monstrose 'mieckleyanus' (Thin totem pole). Sunset: 12-13,16,17,21-24; USDA: 9-11). Mutated form of Lophocereus schottii. Full sun. Heat tolerant. Little water. Hardy to 18°F. Grows to 20' tall; 8' diameter. Origin: Arizona, northwestern Mexico

Lophocereus schottii v. monstrose (Totem cactus). Sunset:12-13,16,17,21-24; USDA: 9-11). Mutated form of Lophocereus schottii. Full sun. Heat tolerant. Little water. Hardy to 18°F. Grows to 26' tall. Origin: Arizona, northwestern Mexico

Myrtillocactus geometrizans (Blue candle). USDA: 9b-11. Full sun. Heat tolerant. Moderate water. Hardy to 26°F. Grows to 12' tall; 8' diameter. Origin: Northern central Mexico.

Oreocereus celsianus (Old Man of the Andes). Sunset: 10-13; USDA: 8-10. Full sun to light shade. Little water. Hardy to 12°F. Grows slowly to 10'. Origin: Bolivia, Peru, northern Argentina. Plant pictured is a 5 gal. size.

Oreocereus trollii

Pachycereus pringlei (Cardon / Mexican Saguaro). USDA: 10-12. Full sun. Little to moderate water. Hardy to 25°F. Grows slowly to 40'. Origin: Central Baja California.

Stenocereus alamosensis (Octopus cactus). Syn. Rathbunia alamosensis. USDA: 9b-10. Full sun. Little water. Hardy to 28°F. Thicket of bending stems, up to 10 ft tall. Tubular pinkish red flowers, attracts hummingbirds. Origin: Mexico (Chihuahua and Sonora)

Stenocereus marginatus (Mexican fence post / Organ pipe cactus). USDA: 9b-11. Full sun. Heat tolerant. Little water. Hardy to 23° F. Grows to 20' tall. Origin: Central Mexico

Stenocereus pruinosus (Stenocereus griseus). Mexican organ pipe. USDA: 10. Full sun. Heat tolerant. Little to moderate water. Hardy to 23°F. Fast growing to 20' tall. Origin: South-central Mexico.

Stenocereus thurberi (Arizona organ pipe) Sunset: 12-24; USDA: 9b-12. Full sun. Heat tolerant. Little to moderate water. Hardy to 24°F. Fast growing to 20' tall. Origin: Southern Arizona, northern Mexico.