Search results SearchResult 1 of 1Content pagesMultimediaEverythingAdvanced Ageratina herbacea snakeroot Basionym: Eupatorium ageratifolium var. herbaceum A. Gray Smithsonian Contr. Knowl. 5(6): 74. 1853 Synonyms: Eupatorium herbaceum (A. Gray) Greene 3 KB (249 words) - 21:10, 5 November 2020