La sect. Obtusifolii del genero Lonchocarpus (Leguminosae: Papilionoideae: Millettieae) para Mesoamerica.

A revision of the species of Lonchocarpus Kunth sect. Obtusifolii (Bentham) M. Sousa (Leguminosae, Papilionoideae, Millettieae) is presented for Mesoamerica. Of the 12 recognized species, five that are new to science, L. canoensis M. Sousa, L. foveolatus M. Sousa, L. paucinervius M. Sousa, L. sylvicola M. Sousa, and L. velizii M. Sousa, are here described and illustrated. The Mesoamerican species are compared in a key. The series Obtusifolii Bentham is lectotypified with L. rugosus Bentham, and a new combination is made elevating the series to sectional rank. Section Obtusifolii is characterized and distinguished from section Densiflori Bentham. Assessments of the conservation status (IUCN) are made for each taxon