Two new species and one subspecies of Mexican Zapoteca (Leguminosae, Mimosoideae) are described and mapped. Zapoteca balsasensis, endemic to Guerrero, is characterized by having leafless portions of the branchlets bearing persistent stipules, whereas Z. cruzii, also from Guerrero, is distinguished by its ability of producing adventitious roots on the stem nodes. Zapoteca formosa subsp. sinaloana, endemic to Sinaloa, differs by its narrowly-oblong leaflets, which contrast with the oblong-obovate to widely obovate leaflets in the other subspecies. For the three taxa, information on their geographic range, habitat and hypotetical taxonomic affinities are provided.