Lophocereus schottii - http://www.desertusa.com/mag05/dec/op_cactus.html
Article by Joe Zentner on the Organ Pipe Cactus National Monument and the Senita Cactus that grows there. |
Lophocereus schottii: Senita - http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/senita.htm#top
Much information and photographs of the old man cactus growing in its desert home. |