Morphometric analysis and bioclimatic distribution of Glebionis coronaria s.l. (Asteraceae) in the Mediterranean area
We present a revision of Glebionis coronaria in the Mediterranean area based on: a) micro-morphology of the disc floret cypselas observed with a high-resolution confocal microscopy; b) measurements of the disc cypsela with a stereoscopic microscope - duly scaled; c) its distribution in several biocl...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/129055 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/129055 |
| Access Level: | acceso abierto |
| Palabra clave: | 551.586 574.9 582.3/.9 582.32/.998 581.2 502/504 372.85 Bioclimatic Distribution Biogeography Glebionis Identification Key Micromorphology Nomenclature Ciencias Botánica (Biología) Fisiología vegetal (Biología) Medio ambiente natural Enseñanza de las ciencias Métodos de enseñanza 2417 Biología Vegetal (Botánica) 2499 Otras Especialidades Biológicas 24 Ciencias de la Vida 5801 Teoría y Métodos Educativos |
| Sumario: | We present a revision of Glebionis coronaria in the Mediterranean area based on: a) micro-morphology of the disc floret cypselas observed with a high-resolution confocal microscopy; b) measurements of the disc cypsela with a stereoscopic microscope - duly scaled; c) its distribution in several bioclimatic belts; d) field observations; e) comparisons of herbarium samples. Because of this study, we propose the elevation of Glebionis coronaria var. discolor to the rank of species, as Glebionis discolor comb. & stat. nov., based on morphological and ecological characteristics such as the disposition of the intercostal glands, the size of the disc cypsela wings and its distribution according to the bioclimatic belts. Glebionis coronaria, with totally yellow ray florets and intercostal glands aligned, is exclusive to the thermo-Mediterranean bioclimatic belt, while Glebionis discolor, with white ray florets on a yellow base and intercostal glands arranged randomly, is found in the thermo- and meso-Mediterranean belt. Illustrations of micromorphological characteristics of the cypselas, an identification key, a taxonomic synopsis including information on nomenclatural types, synonyms, descriptions of the taxa, and, as supplementary information, a list of the specimens examined and bioclimatic classification of samples localities are also presented. |
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