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PhytoKeys. 2017 Jun 26;(81):103-126. doi: 10.3897/phytokeys.81.11995. eCollection 2017.

Morphometric analysis and bioclimatic distribution of Glebionis coronaria s.l. (Asteraceae) in the Mediterranean area.

Author information

1
Dpt. of Animal and Plant Biology and Ecology, Section of Botany, University of Jaén, Campus Universitario Las Lagunillas s/n, 23071 Jaén, Spain.
2
Dpt. of AGRARIA, "Mediterranea" University of Reggio Calabria, Località Feo di Vito, 89122 Reggio Calabria, Italy.
3
Dpt. of Landscape, Environment and Planning; Institute for Mediterranean Agrarian and Environmental Sciences (ICAAM); School of Science and Technology, University of Évora (Portugal). Rua Romão Ramalho, n°59, P-7000-671 Évora, Portugal.

Abstract

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 discolorcomb. & 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.

KEYWORDS:

Bioclimatic Distribution; Biogeography; Glebionis; Identification Key; Micromorphology; Nomenclature

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