Prosopis caldenia, commonly known as the caldén, is a species of flowering tree in the pea family, Fabaceae, The tree is endemic to subtropical regions of Argentina. It thrives in sandy and arid soil and resists drought, developing an extremely deep root system. The leaves of this tree are pinnately compound, deciduous, alternate and small. Its foliage is tortuous, with conical spines arranged in pairs at the nodes.
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