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| By 100 years the saguaro may have reached 25 feet. Saguaros that live 150 years or more attain the grandest size, towering as much as 50 feet and weighing 8 tons, sometimes more, dwarfing every other living thing in the desert. These are the largest cacti in the United States. Their huge bulk is supported by a strong but flexible cylinder-shaped framework of long woody ribs. | |
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