trié(s) par (Pertinence décroissant(e), Titre croissant(e)) 

Does Hieracium sect. Pulmonarioidea occur in Scandinavia? Finding a place for species of the Depilata group / T. Tyler in New Journal of botany, vol. 7, n°2-3 (Année 2017)

Public [article]  inNew Journal of botany > vol. 7, n°2-3 (Année 2017) . - pp. 147-151 Titre : Does Hieracium sect. Pulmonarioidea occur in Scandinavia? Finding a place for species of the Depilata group Type de document : texte imprimé Auteurs : T. Tyler, Auteur Année de publication : 2018 Article en page(s) : pp. 147-151 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Hieracium [Thèmes] Morphologie végétale [Thèmes] Taxonomie Mots-clés : hybridation  Hieracium depilatum  aire de répartition Résumé : "The taxonomic position and evolution of the five Scandinavian montane species previously referred to the informal group Depilata of Hieracium are discussed. There is very little modern information about these species and as they have not been listed under any of the currently accepted sections of the genus they are at risk of being completely forgotten. They have always been considered as intermediate between H. sect. Alpina and sect. Prenanthoidea, but as discussed here they can hardly be included in either of these sections. However, C European species intermediate between the same two sections have been referred to H. sect. Pulmonarioidea and it appears appropriate to include the Depilata here as well. Hereby, the geographic range of H. sect. Pulmonarioidea is most significantly enlarged and its morphological circumscription is somewhat amended. The morphology of Scandinavian H. sect. Pulmonarioidea is described and a brief overview of the species and their distribution is provided. In addition, the possibility that the species concerned may have evolved in situ in Scandinavia through hybridisation between members of H. sect. Alpina and sect. Prenanthoidea is discussed." (source : auteur) Type de publication : périodique Référence biblio : Tyler T., 2018 - Does Hieracium sect. Pulmonarioidea occur in Scandinavia? Finding a place for species of the Depilata group. New Journal of botany, 7 : 147-151. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66881 [article]

Exemplaires(1)

Cote	Localisation	Disponibilité
P0130-5	Brest	Exclu du prêt

Morphometric analyses and species delimitation in Legousia (Campanulaceae) / Eric Wahlsteen in Willdenowia, vol. 49, n°1 (Année 2019)

Public [article]  inWilldenowia > vol. 49, n°1 (Année 2019) . - pp. 21-33 Titre : Morphometric analyses and species delimitation in Legousia (Campanulaceae) Auteurs : Eric Wahlsteen, Auteur ; T. Tyler, Auteur Année de publication : 2019 Article en page(s) : pp. 21-33 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Legousia [Thèmes] Clé de détermination [Thèmes] Taxonomie Mots-clés : classification Résumé : "n order to evaluate the traditional morphological characters commonly used to distinguish the taxonomically problematic species of Legousia, we carried out a morphometric study with univariate analysis, principal component analysis (PCA), discriminant analysis (DA) and cluster analysis (UPGMA). The analyses were based on data from 436 individuals on 207 herbarium specimens from 18 countries in Europe, Africa and Asia representing all recently accepted species of the genus. Legousia falcata was found clearly distinct based on binary characters, L. falcata and L. hybrida were separated using refined binary and continuous characters, whereas L. pentagonia, L. snogerupii and L. speculum-veneris were all mixed in a single cluster, as were L. castellana, L. falcata and L. scabra. In a further refined sampling, L. snogerupii was separated by PCA, DA and UPGMA, but L. pentagonia and L. speculum-veneris were still indistinguishable and formed a single mixed cluster. Based on the results, we propose to reduce L. castellana and L. scabra to synonyms of L. falcata, and L. skvortsovii to a synonym of L. hybrida, while subspecific rank is proposed for L. pentagonia as L. speculum-veneris subsp. pentagonia, comb. & stat. nov. A key and nomenclatural synopsis of accepted taxa is provided and their geographic distribution is outlined." (source : auteurs) Type de publication : périodique Référence biblio : Wahlsteen E., Tyler T., 2019 - Morphometric analyses and species delimitation in Legousia (Campanulaceae). Willdenowia, 49 (1) : 21-33. ID PMB : 71892 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71892 [article]

Exemplaires(1)

Cote	Localisation	Disponibilité
P0170	Brest	Exclu du prêt

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