Pilosocereus purpusii -... species.wikimedia.org

On-line Guide to the... www.cactiguide.com

On-line Guide to the... www.cactiguide.com

On-line Guide to the... www.cactiguide.com

On-line Guide to the... www.cactiguide.com

Cephalocereus www.desert-tropicals.com

Pitayo viejo (Pilosocereus... enciclovida.mx

38 Cacti & Succulent... www.cactuseros.com

Pitayo viejo (Pilosocereus... enciclovida.mx

Pitayo viejo (Pilosocereus... enciclovida.mx

The Cactaceae :... www.alamy.com

Image from page 83 of... www.flickr.com

PlantFiles: The Largest... davesgarden.com

The Cactaceae :... www.alamy.com

Pitayo viejo (Pilosocereus... enciclovida.mx

38 Cacti & Succulent... www.cactuseros.com

38 Cacti & Succulent... www.cactuseros.com

The Cactaceae :... www.alamy.com

Southwestern Arboretum repository.arizona.edu

The Cactaceae :... www.alamy.com