Transfer of Paraguayan Eupatorium amambayense to Chromolaena (Asteraceae, Eupatorieae) with taxonomical notes

Vanina G. Salgado; Mariana A. Grossi; Diego G. Gutiérrez

doi:10.14522/darwiniana.2023.111.1077

Authors

Vanina G. Salgado División Plantas Vasculares, Museo Argentino de Ciencias Naturales (MACN-CONICET), Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina.
Mariana A. Grossi División Plantas Vasculares, Museo de La Plata, Paseo del Bosque s.n., BFW1900A La Plata, Argentina; Laboratorio de Morfología Comparada de Espermatófitas, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, Av. 60 s.n. entre 116 y 118, B1900FWA La Plata, Buenos Aires, Argentina. https://orcid.org/0000-0002-9837-9156
Diego G. Gutiérrez División Plantas Vasculares, Museo Argentino de Ciencias Naturales (MACN-CONICET), Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina; Laboratorio de Morfología Comparada de Espermatófitas, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, Av. 60 s.n. entre 116 y 118, B1900FWA La Plata, Buenos Aires, Argentina. https://orcid.org/0000-0001-9292-235X

DOI:

https://doi.org/10.14522/darwiniana.2023.111.1077

Keywords:

Chromolaena, Eupatorium, Paraguay, Praxelinae

Abstract

Eupatorium amambayense, an endemism of Paraguay, was originally described within Eupatorium sect. Cylindrocephalum. Nowadays, genus Eupatorium is restricted to species from North America and Eurasia, and section Cylindrocephalum is a synonym of Chromolaena (Praxelinae). The objective of the work is to determine the current taxonomic identity of E. amambayense. Detailed comparative analyses of morphological traits, the protologue and type materials have revealed that the species belongs to Chromolaena and can be differentiated from the other genera of Praxelinae, especially Praxelis. As result the transfer of Eupatorium amambayense as Chromolaena amambayensis is proposed.