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Brachypodium ×cugnacii A.Camus nieuw voor Nederland / Ger Londo in Gorteria, vol. 33 (Années 2007-2008)  

Public [article]  inGorteria > vol. 33 (Années 2007-2008) . - pp. 1-10 Titre : Brachypodium ×cugnacii A.Camus nieuw voor Nederland Type de document : texte imprimé Auteurs : Ger Londo, Auteur ; Hans de Jong, Auteur Année de publication : 2008 Article en page(s) : pp. 1-10 Langues : Néerlandais (nla) Catégories : [ZG] Pays-Bas [Espèces (in biblio)] Brachypodium pinnatum [Espèces (in biblio)] Brachypodium sylvaticum [Espèces (in biblio)] Brachypodium x cugnacii Mots-clés : plante hybride  comparaison d'espèces  description Résumé : "Brachypodium ×cugnacii, the hybrid of B. pinnatum and B. sylvaticum, has originated spontaneously in a vegetation withthe parental species at the transition between calcareous grassland and scrub in the first author’s ecological experimental garden in Scherpenzeel (The Netherlands) in a vegetation gradient between calcareous grassland and scrub. The hybrid has chromosome number 23, which is intermediate to that of the parental species (being 28 and 18, respectively). The features of B. ×cugnacii are largely intermediate to those of the parental species. In 2006, a plant with interme-diate features was also found in the southern part of the Province of Limburg, The Netherlands. Presumably, this plant also belongs to B. ×cugnacii, even though this has not yet been confirmed by chromosome research." (source : auteurs) Type de publication : périodique Référence biblio : Londo G., de Jong H., 2008 - Brachypodium ×cugnacii A.Camus nieuw voor Nederland. Gorteria, 33 : 1-10. ID PMB : 69432 En ligne : https://repository.naturalis.nl/pub/528107 Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69432 [article]

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Landoltia punctata (G. Mey.) D.H. Les & D.J. Crawford (dotted duckweed), a new record for The Netherlands / Johan van Valkenburg in Gorteria, vol. 33 (Années 2007-2008)

Public [article]  inGorteria > vol. 33 (Années 2007-2008) . - pp. 41-49 Titre : Landoltia punctata (G. Mey.) D.H. Les & D.J. Crawford (dotted duckweed), a new record for The Netherlands Type de document : texte imprimé Auteurs : Johan van Valkenburg, Auteur ; Roelf Pot, Auteur Année de publication : 2008 Article en page(s) : pp. 41-49 Langues : Néerlandais (nla) Catégories : [ZG] Pays-Bas Mots-clés : Landoltia punctata  illustration  description Résumé : "Landoltia punctata, native to Australia and SE Asia, was first recorded in The Netherlands in 2007. The species can be recognized by the narrowly egg-shaped to slightly kidney-shaped fronds, with one or three curved nerves. The ventral side if often purplish-red, especially at the margin. The fronds have more than one, but always relatively few roots. The species was often encountered as contamination in water tanks at garden centres and pet shops selling aquarium plants. It is very plausible that Landoltia punctata has been introduced as a contamination with aquarium plants from South-East Asia. In Europe the number of recent records is low and some were only temporary. It is not very likely that the species will be a nuisance to water management in The Netherlands. Its ecology hardly differs from other indigenous duckweed species and the risk of replacement of a native species is very low." (source : auteurs) Type de publication : périodique Référence biblio : van Valkenburg J., Pot R., 2008 - Landoltia punctata (G. Mey.) D.H. Les & D.J. Crawford (dotted duckweed), a new record for The Netherlands. Gorteria, 33 : 41-49. ID PMB : 69812 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69812 [article]

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