Redescubrimiento y confirmación de la presencia de Pycnophyllum macropetalum (Caryophyllaceae) para la Flora Argentina

Christian Alejandro Zanotti; Juan M. Cellini; Martín Timaná; Juan M. Azaro; Juan M. Acosta

doi:10.14522/darwiniana.2024.121.1204

Authors

Christian Alejandro Zanotti Instituto de Botánica Darwinion, Labardén 200, Casilla de Correo 22, B1642HYD San Isidro, Buenos Aires, Argentina https://orcid.org/0000-0002-4804-7655
Juan M. Cellini Laboratorio de Investigaciones en Maderas (LIMAD) Facultad de Ciencias Agrarias y Forestales (FCAyF), Universidad Nacional de La Plata (UNLP), La Plata, Argentina https://orcid.org/0000-0002-7870-5751
Martín Timaná Centro de Investigación en Geografía Aplicada (CIGA), y Sección Geografía y Medio Ambiente, Pontificia Universidad Católica del Perú, Lima, Perú https://orcid.org/0000-0003-1559-4449
Juan M. Azaro Laboratorio de Investigaciones en Maderas (LIMAD) Facultad de Ciencias Agrarias y Forestales (FCAyF), Universidad Nacional de La Plata (UNLP), La Plata, Argentina https://orcid.org/0000-0002-8535-0151
Juan M. Acosta Instituto de Botánica Darwinion, Labardén 200, Casilla de Correo 22, B1642HYD San Isidro, Buenos Aires, Argentina https://orcid.org/0000-0002-0223-2185

DOI:

https://doi.org/10.14522/darwiniana.2024.121.1204

Keywords:

Argentina, Caryophyllaceae, phylogeny, Pycnophyllum

Abstract

Pycnophyllum macropetalum Matff. is a species originally described for the Andes of Chile which has also been collected in Bolivia and in Argentina. Presence of P. macropetalum in Argentina is based on a single sterile specimen collected in 1945. For this reason, and because P. macropetalum is morphologically very similar to P. molle, the species was excluded from the Argentinian flora; however, recently, a population of P. macropetalum has been found in the province of Jujuy (Argentina). Therefore, the objective of this work is to describe and to illustrate this species, to provide environmental notes about the habitat where it was found, and to provide a map of the geographic distribution of the species for Argentina, Bolivia and Chile. Furthermore, based on molecular analyzes of the collected specimen, the morphological identification is corroborated, and the monophyly of the genus is confirmed. Finally, a dichotomous key is provided to differentiate the four Pycnophyllum species recorded in Argentina.

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