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This name is applied to a caoutchouc plantation, the caoutchouc being extracted from the "seringueira" tree, whose scientific name is siphonia elastica. It is said that, by negligence or bad management, the number of these trees is decreasing in the basin of the Amazon, but the forests of seringueira trees are still very considerable on the banks of the Madeira, Purus, and other tributaries.
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