Lophocereus schottii: Senita
- Much information and photographs of the old man cactus growing in its desert home.
- http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/senita.htm#top

Lophocereus schottii
- Article by Joe Zentner on the Organ Pipe Cactus National Monument and the Senita Cactus that grows there.
- http://www.desertusa.com/mag05/dec/op_cactus.html