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

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