<em>Pseudognaphalium aldunateoides</em> de nuevo bajo <em>Gnaphalium (Compositae: Gnaphalieae)</em>

A. Acosta-Maindo; M. Galbany-Casals

doi:10.3989/collectbot.2018.v37.012

Autores/as

A. Acosta-Maindo Unitat de Botànica, Departament de Biologia Animal, Biologia Vegetal i Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona https://orcid.org/0000-0002-3619-8181
M. Galbany-Casals Unitat de Botànica, Departament de Biologia Animal, Biologia Vegetal i Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona - Sistemática y Evolución de Plantas Vasculares (Universitat Autònoma de Barcelona), Unidad Asociada al CSIC https://orcid.org/0000-0002-7267-3330

DOI:

https://doi.org/10.3989/collectbot.2018.v37.012

Palabras clave:

ETS, ITS, espaciador intergénico rpl32-trnL, estereoma, filogenia molecular, micromorfología, vilano

Resumen

La clasificación genérica de varios miembros de la tribu Gnaphalieae (Compositae) y en particular la delimitación genérica del antiguo género Gnaphalium ha sido problemática durante mucho tiempo. El género Pseudognaphalium fue escindido de Gnaphalium por su morfología lo que después fue apoyado por filogenias moleculares. Sin embargo, la identidad genérica de algunas especies todavía es dudosa. Aquí aportamos un estudio morfológico de Pseudognaphalium aldunateoides, que es comparado con las especies tipo de los géneros Gnaphalium (Gnaphalium uliginosum) y Pseudognaphalium (Gnaphalium oxyphyllum). También hemos incluido estas tres especies en filogenias moleculares de la tribu Gnaphalieae basadas en ADN ribosómico nuclear y ADN cloroplástico. Nuestros resultados muestran que P. aldunateoides tiene el vilano dimórfico, carácter que no está presente en el género Pseudognaphalium pero que, sin embargo, es característico del género Gnaphalium. Además, su estereoma muestra características intermedias entre el estereoma no dividido típico del género Gnaphalium y el estereoma fenestrado típico del género Pseudognaphalium. En ambas filogenias, P. aldunateoides se sitúa dentro del clado Gnaphalium s. str., no próximamente emparentado con Pseudognaphalium. Con todas estas evidencias concluimos que P. aldunateoides se clasifica correctamente dentro de Gnaphalium.

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Citas

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