New taxa of the Lonchocarpus genus from Mexico and Mesoamerica (Leguminosae, Papilionoideae, millettieae) are described and illustrated. of the 19 recognized species, eight species: L. brenesii, L. isthmensis, L. latimarginatus, L. michoacanicus, L. pedunculatus, L. plicatus, L. subsessilifolius and L. wendtii, and a new subspecies of L. brenesii, subsp. vulcanicola, are new to science. The Lonchocarpus section is once again characterized with this significant increase in the number of its known species. Mesoamerican species and subspecies of the Lonchocarpus section show contrasting differences in the dichotomous key.
