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Science. Botany. Angiosperms (Flowering Plants).      
cactus Family Cactaceae (Cactuses).
 
Saguaro (Carnegiea gigantea)The Saguaro (Carnegiea gigantea) is the largest cactus of the United States, standing up to 50 feet tall and weighing as much as 10 short tons. It is also one of the longest-living plants in the world, with 200-year-old specimens not being uncommon.

Cactuses (Rookie Read-About Science)
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Science.--Botany.--Angiosperms (Flowering Plants).

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