A new combination and lectotypification in the genus Desmodium (Papilionoideae: Desmodieae) of Mexico

During the review of the genus Desmodium for the different regional floras of Mexico, we have identified problems of nomenclature and typification such as the case of Meibomia karwinskii, wrongly cited in the list of Legumes of Oaxaca as Desmodium karwinskii and thus invalidly published. Also, in this list the attached illustration exhibits incorrect interpretations on its floral characters that does not agree with usage of this species. In this proposal, the nomenclature of the species name is discussed and justified here the designation of a lectotype and three isolectoypes. In addition, a more detailed description of the species is given based on recent field collections and illustrated with images of the habit and morphological characters.