A Morphometric Analysis of the Santolina chamaecyparissus Complex (Asteraceae)

Antonio Giacò, Paola De Giorgi, Giovanni Astuti, Paolo Caputo, Miguel Serrano, Rodrigo Carballal, Llorenç Sáez, Gianluigi Bacchetta, Lorenzo Peruzzi

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Resum

The genus Santolina (Asteraceae, Anthemideae) includes 26 species of aromatic evergreen shrubs endemic to the western Mediterranean Basin. Santolina is widely used as ornamental plant, in xerigardening, and in ethnobotany. The Santolina chamaecyparissus complex, including about half of the known species diversity, has been properly investigated on systematic and taxonomic grounds only recently, and a complete morphometric study is still missing. Here we provide a morphometric characterization and comparison of all the 14 species of this complex, using both univariate and multivariate analyses. Our results suggest that species of this complex can be distinguished using combinations of quantitative and qualitative character-states, mostly related to the leaf morphology. The analysis of S. villosa, a tetraploid/hexaploid Spanish endemic, showed that the two cytotypes cannot be safely identified based on morphology. Coupling this evidence with available phylogenetic information, we conclude that there is no reason to split the two cytotypes of S. villosa in two distinct taxa. An identification key for all the species of the complex is presented.
Idioma originalEnglish
RevistaPlants
Volum11
Número24
DOIs
Estat de la publicacióPublicada - 2022

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