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O. Hinojosa-Espinosa, J. L. Villaseñor, and E. Ortiz, “On the identity of two Mexican species of <em>Ageratina</em> (Eupatorieae, Asteraceae): <em>A. grandifolia</em> and <em>A. rivalis</em&gt;”, Bot. Sci., vol. 97, no. 2, pp. 250-259, Jun. 2019.