Please note that the Museum will be closing at noon on Wednesday, September 9, 2026 for a staff appreciation event. (Art Institute classes are not affected by the closure.)
A hillside of organ pipe cacti and a lone saguaro in the Puerto Blanco Mts, Organ Pipe Cactus National Monument, Arizona. Organ pipe cactus is a tropical species that extends into the Sonoran Desert. It is more abundant in thornscrub and tropical deciduous forest. See the gallery on coastal thornscrub for an impenetrable organ pipe forest.
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