This richly illustrated work delves into the taxonomic intricacies of one of the most complicated groups in botany. Here, the authors expand upon and synthesize earlier discussions of the generic affinities morphological diversity, and unique features of each genus within the Eupatorieae. Included are sections on the taxonomic history, the cytology, and the chemistry of the group. Extensive and detailed keys to all the genera are presented, along with keys to the genera of Mexico, Colombia, the West Indies, and Brazil. Intricate line drawings accompany each genus. The Genera of the Eupatorieae is a seminal work in the study of the Asteraceae and provides a key reference staple for any botanical library.