The shrublands growing on siliceous and/or calcium-poor substrata of the hilly and mountainous areas of north-western and central Italy were studied. This secondary vegetation is dominated by several acidophilous shrubs like Ulex europaeus, Cytisus scoparius, Erica arborea, E. scoparia and Calluna vulgaris. The synecology, synchorology and syntaxonomy of this vegetation was studied using multivariate methods, and discussed in comparison with similar types described in other zones of the Italian peninsula. Two new subassociations are proposed here: Erico arboreae-Arbutetum unedonis genistetosum germanicae and Calluno-Sarothamnetum ericetosum scopariae. Calluno-Sarothamnetum is typified; the Sarothamnion alliance is discussed and referred to Cytisetea scopario-striati. The presence of Calluno-Ulicetea and Cytisetea scopario-striati classes is discussed, and a syntaxonomical scheme is proposed.

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In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, exclusions, and status changes to the Italian administrative regions. A new combination in the genus Pilosella is proposed. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.

Abstract. In Tuscany (Italy), oak mixed woods with high cover values of Quercus petraea are rather infrequent but well documented within local and national phytosociological studies, even if, in the literature, not always analyzed and well characterized from the syntaxonomic view point. We gathered 71 published and unpublished Tuscan phytosociological relevés where Q. petraea was dominant or with relevant cover values, that were investigated by means of multivariate analysis. The ecological requirements of the resulting groups were indirectly calculated by means of Ellenberg Indicator Values (EIV), and the fidelity coefficient (PHI) for the diagnostic species of each group was calculated. According to our analysis, five different types of Q. petraea woods were found to be present in Tuscany. Each group was characterized floristically and ecologically, allowing to investigate their syntaxonomic aspects. Thus we have attributed the Tuscan Q. petraea communities to five different associations, two of which already existing and three are here described as new associations. In the end, some conservation aspects of these woods regarding Natura 2000 habitats are discussed. Keywords: Ecology; Distribution; Phytosociology; Sessile oak; Syntaxonomy; Vegetation[es] Bosques de Quercus petraea (Matt.) Liebl. de la Toscana (Italia): clasificación de la vegetación Resumen. En la región de la Toscana (Italia), los robledales con altos valores de cobertura de Quercus petraea son bastante infrecuentes pero están bien documentadas en los estudios fitosociológicos locales y nacionales, incluso si en la literatura no siempre se analizan y caracterizan bien desde el punto de vista sintaxonómico. Recopilamos 71 datos fitosociológicos de esta región publicados y no publicados en los que Q. petraea aparece como dominante o con valores de cobertura relevantes y que se han analizado mediante análisis multivariante. Los requisitos ecológicos de los grupos resultantes se calcularon indirectamente mediante los valores del indicador de Ellenberg (EIV), y se calculó el coeficiente de fidelidad (PHI) para las especies de diagnóstico de cada grupo. Los resultados del análisis mostraron cinco tipos diferentes de bosques de Q. petraea en la Toscana. Cada grupo está caracterizado por un elenco florístico concreto y unos requisitos ecológicos diferenciados que nos ha permitido investigar sus aspectos sintaxonómicos. Así podemos atribuir las comunidades toscanas de Q. petraea a cinco asociaciones diferentes, dos de las cuales ya existen y tres son descritas en este trabajo como nuevas asociaciones. También se discuten algunos aspectos de conservación de estos bosques con respecto a los hábitats Natura 2000.

The recent Landscape Plan of Tuscany Region pays particular attention towards the floodplain woods, for their conservation concern, landscape, and historical importance. The floodplain forest vegetation is defined as the natural and semi-natural wood vegetation located close to the rivers and submerged only during exceptional flooding. We gathered 180 both published and unpublished relevés coming from Tuscany and carried out in floodplain woods, where Alnus glutinosa, Fraxinus angustifolia subsp. oxycarpa, Quercus robur, Ulmus minor, Carpinus betulus, Populus nigra, P. alba and Salix alba were dominant, alone or in consociation with each other. On this dataset we performed a multivariate analysis, and the resulting groups were characterized by several points of view: floristic, ecological, chorological, by mean of diagnostic species, with the use of EIV. Moreover, their distribution in Tuscany was better defined. According to our results, six associations were found to be present in Tuscany. Thereby, one new association and three new subassociations were proposed. The syntaxonomic arrangement above the association level was discussed, with particular attention to the Italian Fraxinus angustifolia subsp. oxycarpa-rich communities. Finally, a comparison with the Annex I habitat types (sensu Directive 92/43/EEC) was carried out.