Santosia is a genus of plants in the tribe Eupatorieae within the family Asteraceae.[D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: The Families and Genera of Vascular Plants vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Verlag. Berlin, Heidelberg.][ King, Robert Merrill & Robinson, Harold Ernest. 1980. Phytologia 45: 463-465.]
The genus was named for Brazilian biologist Talmon S. dos Santos.[
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- Species
The only known species is Santosia talmonii, native to the State of Bahia in eastern Brazil.[ The Plant List Santosia talmonii R.M.King & H.Rob. ]