La Vegetazione arbustiva di un settore costiero dell'adriatico centrale italiano

The shrubby vegetation in a coastal sector of italian central adriatic sea. The results of the phytosociological analysis concerning the shrubby vegetation of a sector of the italian adriatic coast, of around 20 Kms, situated in the Rrgional natural park of Conero, are presented. It deals with mountainous coasts of two main lithomorphological typologies: marly-arenaceous and calcareous formations. On the first formation, in correspondence to marly rocks, the newLonicero etruscae-Cornetum sanguineaeassociation, belonging to theedapho-hygrophilousmeso and submediterranean pre-apennine series of the elm (Symphyto bulbosi-Ulmeto minoris sigmetum), develops. On the contrary, on sand stones, constituted by superimposed levels and intercalated to marlstones, develops axerophilousvegetation which stops at the maquis stadium, referred to the newCoronillo emeroidis-Rhamnetum alaterniassociation in the newloniceretosum etruscae sub-association. On the calcareous cliffs of the warmest slopes, a maquis vegetation develops, referred to the same association but in the most thermophilous subassociation viburnetosum tini, colonising partially consolidated screes, which represents an element of the mesomediterranean italian-tyrrhenian and amphiadriatic calcicolous series of the holm-oak (Fraxino orni -Querceto ilicissigmetum). Finally, on the steep slopes of the compact limestones of the warmest sectors of the South-East side of M. Conero (Valley ofthe Vellare), the new ampelodesmetosum mauritanici sub-association oftheCoronillo emeroidis-Euphorbietum dendroidisassociation is described. It differentiates from the latter for the presence of more temperate elements and for the loss of some thermomediterranean species.