Summary Eupatorium maculatum L. (Compositae: Eupatorieae: Eupatoriinae) is described and illustrated. Notes are provided for the species’ cultivation, propagation, likely pests and diseases, and availability, along with useful contrasting planting in a prairie garden or specimen border planting. A full synonymy is given, along with type citations and known presence of type material, together with relevant notes. Selected illustrations of the species are cited, and statements of the species’ distribution, habitat and ecology, phenology, etymology, conservation status and vernacular names provided. A simple explanation of tribal placement also suggests why the inclusion of Eutrochium and Eupatoriadelphus in synonymy of Eupatorium should be considered. The possession of coloured pappus setae in this species is commented on, and a token listing of some of the more spectacular colours, and the tribes in which they occur tentatively suggests why some colours exist.
Hind et al. (Mon,) studied this question.