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Australian Systematic Botany Australian Systematic Botany Society
Taxonomy, biogeography and evolution of plants
RESEARCH ARTICLE

Understanding Praxelis (Asteraceae, Eupatorieae): an updated taxonomy with lectotypifications and morphological and distributional clarifications

Vanina G. Salgado https://orcid.org/0000-0001-7430-5956 A * , Mariana A. Grossi B C , Rogério N. Ribeiro D , Carolyn E. B. Proença D and Diego G. Gutiérrez A C
+ Author Affiliations
- Author Affiliations

A División Plantas Vasculares, Museo Argentino de Ciencias Naturales, CONICET, Avenida Ángel Gallardo 470, Buenos Aires, C1405DJR, Argentina.

B División Plantas Vasculares, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n, La Plata, B1900FWA, Argentina.

C Laboratorio de Morfología Comparada de Espermatofitas, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, 60 and 119 Street, La Plata, B1900FWA, Argentina.

D Departamento de Botânica, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, 70919-900, Brazil.

* Correspondence to: vgsalgado@macn.gov.ar

Handling Editor: Leon Perrie

Australian Systematic Botany 35(4) 296-316 https://doi.org/10.1071/SB21027
Submitted: 27 July 2021  Accepted: 20 April 2022   Published: 28 July 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing.

Abstract

The South American genus Praxelis Cass. (Asteraceae, Eupatorieae) includes 18 species and is the second-largest genus of subtribe Praxelinae. It is distributed from Colombia, Venezuela and the Guianas, to central Argentina, southern Brazil and north-western Uruguay. Over the past 40 years, one species, P. clematidea, has invaded several countries around the world. To understand Praxelis and its species, this study provides an updated taxonomy with the re-establishment of P. urticeafolim var. nanum as a synonym of P. ostenii, 16 lectotypifications, clarification of morphology and geographical distribution, brief descriptions, and the first key to all the species in the genus.

Keywords: Compositae, Eupatorium, lectotypification, nomenclature, Ooclinium, Praxelinae, South America, taxonomy.


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