Phytosociological analysis of the <i>Genista</i> sp. pl. garrigues of the <i>Cisto</i>-<i>Lavanduletea</i> and <i>Rosmarinetea</i><i>officinalis</i> classes in the South-Tyrrhenian area (Mediterranean Region)

The study reviews the <i>Genista</i> sp. pl. garrigues ascribable to the classes <i>Cisto</i>-<i>Lavanduletea</i> (acidophilous communities on volcanics and quartzarenites) and <i>Rosmarinetea</i><i>officinalis</i> (basiphilous communities on calcareous and calcareous-dolomite substrates), in the southern territories of the Italo-Tyrrhenian Province. The floristic-synecological characterization of the identified coenoses led to the description and/or redefinition of various new syntaxa. They are distributed in the two new suballiances <i>Calicotomo</i><i>villosae</i>–<i>Genistenion</i><i>tyrrhenae</i> and <i>Genisto</i><i>aristatae</i>–<i>Calicotomenion</i><i>infestae</i> of the class <i>Cisto</i>-<i>Lavanduletea</i> (<i>Lavanduletalia</i><i>stoechadis</i> and <i>Calicotomo</i><i>villosae</i>–<i>Genistion</i><i>tyrrhenae</i>), and in the alliance <i>Cisto</i><i>eriocephali</i>–<i>Ericion</i><i>multiflorae</i> of the class <i>Rosmarinetea</i><i>officinalis</i> (<i>Rosmarinetalia</i><i>officinalis</i>), with two new described associations.