Ecology of the Tilio-Acerion Klika 1955 forests in Molise and coenological and phytogeographical consideration about ravine woodlands of the south-central Apennine (central and southern Italy). On the bases of releves recognized to the Eastern sector of the Matese Mountain (South Apennines), we analyzed a synecological and syntaxonomical meaning of the dominated Acer opalus subsp. obtusatum, Tilia plathyphyllos, Ostrya carpinifolia and Acer cappadocicum subsp. lobelii forests. These broadleaved mixed woods, are belonging to the Tilio-Acerion Klika 1955 alliance (in the Fagetalia sylvaticae order, and Querco-Fagetea class). These fragmented coenoses, normally considered as relics stands, are located in specific morphological conditions (‘ravine woodlands’), like in the steep slopes and ravines, at the bottom of shady steep-sided valleys and on colluvial deep soils at the foot of slopes. We defined the new association Aro lucanii-Aceretum lobelii, a typical Southern communities with an high number of Endemic entities. The chorological analysis and a comparison with other Central and Southern Apennine similar forests, emphasize the Illirical floristic connotation and extraordinary biogeographical significance for the Molise region forests
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