Two new species of legume, Caesalpinia celendiniana and Mimosa lamolina and one new variety, Caesalpinia pluviosa var. maraniona, from the inter-Andean Río Marañón Valley in northern Perú are described and illustrated. These add to the already impressive tally of endemics known from the seasonally dry tropical forests of the Río Marañón Valley, which apparently far exceeds the endemic plant diversity from other nearby inter-Andean dry valleys in Perú and southern Ecuador.
Recent molecular studies show that the Chilean endemic Caesalpinia aphylla Phil. is placed in the wrong genus and should be transferred to Hoffmannseggia as H. aphylla (Phil.) G. P. Lewis & Sotuyo. A number of morphological characters support this transfer. A short description and illustration of the species are provided to aid identification.
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