Photo: Carnegiea gigantea 7.

Size comparison of Carnegiea gigantea (saguaro) (larger) and Stenocereus thurberi (organ pipe cactus) (smaller). Organ Pipe Nat'l monument, AZ, US. Wild. 1998-03-01.
Carnegiea gigantea (Engelm.) Britt & Rose Engl.: saguaro, giant cactus, saguaro cactus. Deu.: Riesenkaktus, Saguaro, Saguaro Kaktus. Sven.: saguaro-kaktus. Bot. syn.: Carnegia gigantea (Engelm.) Britt. & Rose, Cereus giganteus Engelm., Pilocereus giganteus (Engelm.) Rümpler
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Photo: Carnegiea gigantea 7.