A taxonomic headache due to a ‘Frankenstein type’: solving the identity and typification of a Mimosa species

A nomenclatural type is the element to which a name permanently linked and must consist of gathering, or part single species infraspecific taxon. However, sometimes more than one may be mounted on herbarium sheet (‘Frankenstein type’), causing confusion (admixture) in use name, creates difficulties delimitation application its (‘taxonomic headache’). This case assigned holotype Mimosa asperoides Izag. & Beyhaut that composed also other species. To solve ‘Frankenstein type’ asperoides, we analyzed original material, protologue, performed morphological comparative analysis distinguish involved admixture. These analyses allowed us identify fragments correspond M. enabling lectotypification providing new diagnostic features amend description. Finally, reported first citation for Brazil discussed link between nomenclature taxonomy taxonomic headache due