Abstract
Taxonomic studies of Tephrosia Pers. (Leguminosae, Papilionoideae, Millettieae) in South America have highlighted the need to resolve some nomenclatural issues. Five new synonyms are proposed and a new species is described. Nine lectotypes of accepted names and synonyms, and one neotype, are here designated. An identification key to the taxa occurring in South America is also presented.
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