Carnegia Gigantea: Saguaro
- Comprehensive information on this cactus, with many photographs of it growing in its natural habitat.
- http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/saguaro.htm#top

Saguaro Cactus: From Life to Death
- Illustrated article given the "Young Naturalist Award" by the American Museum of Natural History.
- http://www.amnh.org/nationalcenter/youngnaturalistawards/yna2003/kyle.html

Carnegiea gigantea
- Description and propagation of the giant saguaro cactus [also known as Cereus giganteus Engelm.].
- http://florawww.eeb.uconn.edu/acc_num/198502363.html

Cereus gigantea - Saguaro cactus
- Photograph.
- http://www.botany.hawaii.edu/faculty/carr/images/cer_gig.jpg

The Biogeography of Cereus giganteus
- Student paper about the biology of the Saguaro cactus; includes photos and diagrams.
- http://bss.sfsu.edu/geog/bholzman/courses/Fall99Projects/saguaro.htm

Saguaro Cactus (Carnegiea gigantea)
- Description and images from Desert USA.
- http://www.desertusa.com/july96/du_saguaro.html

Saguaro Cactus - Carnegiea gigantea
- Color photo, scientific and common names, description, adaptations, habitat, uses, and status.
- http://www.blueplanetbiomes.org/saguaro_cactus.htm