Eupatoriastrum is a genus of flowering plants in 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. It is native to Mexico and Central America (and found in Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua).
The genus is named for Mithridates Eupator, king of Pontus.
The genus has been verified by the United States Department of Agriculture and the Agricultural Research Service, but it does not list any species.
Species As accepted by Plants of the World Online; Eupatoriastrum angulifolium Eupatoriastrum chlorostylum Eupatoriastrum corvi Eupatoriastrum johnbeamanii Eupatoriastrum nelsonii Eupatoriastrum pochutlanum Eupatoriastrum triangulare
References
Other sources Turner, B. L. 1994. Systematic study of the genus Eupatoriastrum (Asteraceae, Eupatorieae). Pl. Syst. Evol. 190:113-127.