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Which cactus is the signature plant of the Sonoran Desert?
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North American Desert
Physical features of western North America.
The saguaro (Carnegiea gigantea) is the signature plant of the Sonoran Desert. This large, ribbed, and columnar cactus is native to parts of the United States and Mexico and is well-known for its slow growth and ability to reach heights of up to 15 metres (almost 50 feet).12