Willdenowia / Botanic Garden, Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Botanischer Garten, Botanisches Museum Berlin-Dahlem, BGBM . vol. 49, n°1Paru le : 01/04/2019 |
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Cote | Localisation | Disponibilité |
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P0170 | Brest | Exclu du prêt |
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Ajouter le résultat dans votre panierPanicle shoot, an overlooked stem type of several blackberries (Rubus, Rosaceae) / Detlev Drenckhahn in Willdenowia, vol. 49, n°1 (Année 2019)
[article]
Titre : Panicle shoot, an overlooked stem type of several blackberries (Rubus, Rosaceae) Type de document : texte imprimé Auteurs : Detlev Drenckhahn, Auteur Année de publication : 2019 Article en page(s) : pp. 43-52 Langues : Anglais (eng) Résumé : "Blackberries (Rubus subg. Rubus, Rosaceae) are perennial plants that form thickets of biennial spiny stems (canes), which grow in length in the first year and develop flowering laterals in the second year. In the present study, a hitherto overlooked separate type of stem is described, denoted as panicle shoot (PS, turio paniculatus) that occurs in several species of all three European blackberry sections. PSs are up to 2.5 m long, spring directly from the rootstock, terminate apically in a mostly large paniculate inflorescence (simple type) and may develop additional flowering branches (complex type). PSs can emerge from young (two-year old) and older rootstocks established sexually from seeds and vegetatively from tip-rooted canes, respectively. As a rule, they are biennially flowering shoots that develop flowering laterals in the second season. By virtue of their length, PSs tend to project with their panicles out of the surface of bushes and hence overcome the frequent fate of flowering laterals of low arching canes to become rapidly overgrown and overshadowed by surrounding vegetation." (source : auteur) Type de publication : périodique Référence biblio : Drenckhahn D., 2019 - Panicle shoot, an overlooked stem type of several blackberries (Rubus, Rosaceae). Willdenowia, 49 (1) : 43-52. ID PMB : 68643 DOI : 10.3372/wi.49.49106 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=68643
in Willdenowia > vol. 49, n°1 (Année 2019) . - pp. 43-52[article]Exemplaires(1)
Cote Localisation Disponibilité P0170 Brest Exclu du prêt Morphometric analyses and species delimitation in Legousia (Campanulaceae) / Eric Wahlsteen in Willdenowia, vol. 49, n°1 (Année 2019)
[article]
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] TaxonomieMots-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
in Willdenowia > vol. 49, n°1 (Année 2019) . - pp. 21-33[article]Exemplaires(1)
Cote Localisation Disponibilité P0170 Brest Exclu du prêt