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Carnegiea gigantea
http://florawww.eeb.uconn.edu/acc_num/198502363.html
Description and propagation of the giant saguaro cactus [also known as Cereus giganteus Engelm.].
Cereus gigantea - Saguaro cactus
http://www.botany.hawaii.edu/faculty/carr/images/cer_gig.jpg
Photograph.
Saguaro Cactus (Carnegiea gigantea)
http://www.desertusa.com/july96/du_saguaro.html
Description and images from Desert USA.
Saguaro Cactus - Carnegiea gigantea
http://www.blueplanetbiomes.org/saguaro_cactus.htm
Color photo, scientific and common names, description, adaptations, habitat, uses, and status.
Saguaro Cactus: From Life to Death
http://www.amnh.org/nationalcenter/youngnaturalistawards/yna2003/kyle.html
Illustrated article given the "Young Naturalist Award" by the American Museum of Natural History.
Sammy Saguaro's Scrapbook
http://www.dbg.org/sammy/
A look into the life of the saguaro cactus.
The Biogeography of Cereus giganteus
http://bss.sfsu.edu/geog/bholzman/courses/Fall99Projects/saguaro.htm
Student paper about the biology of the Saguaro cactus; includes photos and diagrams.