Article

The \iehen flora on Juniperus oxycedrus L. in the aneient, montane holm-oak forest at Campu Su Disterru (Supramonte di Orgosolo, eentral-east Sardina, Italy) has been investigated and 68 taxa of \iehens plus 3 lieheni eolous fungi were identifi ed. The most remarkable findings are: Ophioparma rubricosa (Miill. Arg.) Ekman. , new to Europe, and Chaenotecopsis nana Tibell, new to Italy. 8 species are reported for the first time from Sardinia: Agonimia octospora Coppins & P. James, Calicium adspersum Pers. , Caloplaca hungarica_ Magnusson, Chaenotheca phaeocephala (Turn.) Th. Fr., Hypocenomyce scalaris (Ach. ex Lilj.) M. Choisy, Lecanora argentata (Aeh.) Malme, Lepraria umbricola Tensb. and Rinodina archaea (Ach.) Arnold. Many further speeies are rare in Ttaly and in Sardinia. The number of speeies exeeeds that on Quereus ilex L. on the same site. This demonstrates the importanee of a non-dominant tree species for the epiphytie liehen flora of a forest. A phytogeographieal analysis shows that speeies with a wide distribution in temperate areas of Europe are dominant (Temperate element, 72 %). The Atlantic/Oeeanie element eomprises 13%, whil e few speeies belong to other elements: Aretie-alpine / Boreal-montane 3%, Mediterranean-montane 5% and Mediterranean 7%.