Joël MathezUniversité de Montpellier, France · Herbier de l'Université (MPU)
Joël Mathez
Agrégé de Sciences naturelles
About
111
Publications
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362
Citations
Introduction
Additional affiliations
September 1993 - September 2006
Université de Montpellier, France
Position
- Managing Director
January 1993 - November 2015
Université de Montpellier, France
Position
- Retired
Publications
Publications (111)
Les zones humides des Hauts Plateaux sud-constantinois ont été récemment reconnues pour leur intérêt ornithologique. C’est dans deux de ces zones humides que nous avons découvert la présence de Potentilla supina L., espèce paléo-tempérée inconnue en Algérie jusqu’alors. Les deux stations sont situées dans des zones de débordement des oueds sur des...
Wetlands of South Constantine high plateaus were recently recognized for their ornithological interest. Potentilla supina L., a paleo-temperate species, was discovered for the first time in Algeria in two of these wetlands. Both stations are located on freshwater overflow areas on salt-affected soils by evaporation. The observed phytocoenose is cha...
Apports de la palynomorphologie et de la morphologie à la taxinomie des Boraginaceae Cynoglosseae (notamment genres Cynoglossum et Pardoglossum, Rindera gymnandra)
Guide de nomenclature des noms normalisés en français pour les plantes Trachéophytes de France métropolitaine
Résumé
Description et diagnose de Polycarpon Sauvagei J. Mathez sp. nova, plante vivace des fissures des rochers découverte dans le massif du jbel Torziane, point culminant du Plateau Central marocain où elle est très localisée. Cette espèce proche de P. polycarpoides Fiori s'en distingue aisément par ses fleurs bien plus grandes.
http://www.ville-ge.ch/cjb/flore/html/index.html
A morphological study of a new species of Apiaceae and a molecular systematic analysis based on ITS sequences has led to the description of the new genus Pseudoridolfia that is related to Foeniculum, Ridolfia and Anethum. The new species, P. fennanei, occurs in the Tetraclinis articulata formations of the semi—arid valleys located on the northern f...
A group of botanists from both shores of the Mediterranean has recently created a collaborative project
on North African flora with the aim of gathering botanists from different countries who are interested
in this subject. All the people involved in this project will be volonteers and the data will be provided
freely. A committee made out of activ...
RESUME - Cet article fait état de la découverte dans Ie massif de l' Akfadou (Grande Kabylie, Algerie) de Rhynchocorys elephas (L.) Griseb. signale pour la première fois en Afrique du Nord. Après une brève présentation du site et quelques éléments sur
l’écologie de la station, l'article esquisse a l'aide d'un tableau synoptique sommaire les liens d...
RESUME - Cet article fait état de la découverte dans Ie massif de l' Akfadou (Grande Kabylie, Algérie) de Rhynchocorys elephas (L.) Griseb. signalé pour la première fois en Afrique du Nord. Après une breve présentation du site et quelques éléments sur
l’écologie de la station, l'article esquisse a l'aide d'un tableau synoptique sommaire les liens d...
RESUME - Cet article fait état de la découverte dans Ie massif de l' Akfadou (Grande Kabylie, Algérie) de Rhynchocorys elephas (L.) Griseb. signale pour la première fois en Afrique du Nord. Après une brève présentation du site et quelques elements sur
l’écologie de la station, l'article esquisse a l'aide d'un tableau synoptique sommaire les liens d...
Cet article fait état de la découverte dans le massif de l’Akfadou (Grande Kabylie, Algérie) de Rhynchocorys elephas (L.) Griseb. signalé pour la première fois en Afrique du Nord. Après une brève présentation du site et quelques éléments sur l’écologie de la station, l’article esquisse à l’aide d’un tableau synoptique sommaire les liens dynamiques...
The purpose of this study is to provide a new focus to contribute, from the perspective of genomic evolution, towards a better understanding of the Valerianaceae evolutionary history. Chromosome numbers were determined by Feulgen staining in 24 populations of 18 species (first count for Valerianella multidentata, 2n=2x=14–16), and DNA contents were...
A morphological study of a new species of Apiaceae and a molecular systematic analysis based on ITS sequences has led to the description of the new genus Pseudoridolfia that is related to Foeniculum, Ridolfia and Anethum. The new species, P. fennanei, occurs in the Tetraclinis articulala formations of the semi-arid valleys located on the northern f...
Recent progresses in phylogenies inference using molecular markers bring closer a scientific prospect long-awaited by biologists: the carrying out of a "natural", objective, and thus universal classification. Much difficulties are still to be overcomed, to figure out the one and only actual phylogeny, as well as to translate it into classification....
The monophyly of Valerianaceae and the precise delimitation of the family are not totally resolved. Our knowledge on the phylogeny of the group is only partial: on a morphological basis, some contradicting taxonomic proposals have been published, which demonstrates the difficulties in establishing a natural classification of the family and especial...
A preliminary analysis of the sequence alignment of the chloroplast intergene atp beta-rbcL in tribe Valerianeae reveals that insertion-deletion evolutionary events ('indels'), combined with nucleotide substitutions, have occurred in large zones in some of the studied taxa. Due to the frequent occurrence and large size of indels within this tribe,...
Between 1955 and 1977, the main contributions to the systematics ofthe Cardueae were made
by Wagenitz (pollen: 1955), Dittrich (histology of cypselas: 1966, 1968a, 1968b, 1969, 1977,
1984) and Meusel & Kohler (growthforrn: 1960).
Since 1980, new approaches have provided an impetus to a new look at the group. Different
authors used cladistic methods...
The genusFedia consists of three species (F. cornucopiae, F. graciliflora andF. pallescens) of winter annual herbs, endemic to the western Mediterranean Basin. The deciduous terminal fruits of these taxa are polymorphic in the development of their pericarp and/or calyx, and each population is dimorphic or more rarely trimorphic. The three main frui...
The genus Fedia has a W. mediterranean distribution center, but also extends to N. Lybia, Greek Macedonia and Crete. The chromosome number in 26 populations of the seven taxa of the genus was determined to be 2n = 32 (tetraploid, x = 8), consistent with earlier counts (sub F. cornucopiae s.l.). Only one population of F. graciliflora subsp. snasseno...
