Trees and shrubs of Mexico by P. C. Standley (1920C. Standley ( -1926 gives medicinal uses and poisonous properties for a variety ofplants. The literature since 1920 has been reviewedfor further properties ofthe medicinal papilionoid legumes mentioned by Standley, as well as some of their allies, and the results are presented here. It is hoped that this review will not only provide a useful update to Standley's work, but will also draw attention to certain species which have been little studied since Standley's time.Papilionoideae (Fabaceae) Mexicanos de uso medicinal. Primera parte. Esta contribucion es el resultado de una revision bibliografica sobre la subfamilia Papilionoideae (Leguminosae) con usos medicinales y/o propriedades venenosas de laflora de Mexico. Ademds de la gran cantidad de informacion etnobotdnica sobra leguminosas que han sido mencionada por Standley (1920Standley ( -1926 en Los arboles et arbustos de Mexico, se repartan nuevos datos de la literatura moderna, especialmente los referentes a las caracteristicas quimicas de algunas especies. Se seiialan algunas plantas que se consideran importantes ya mencionadas por Standley que lamentablemente no han sido estudiadas desde entonces.