Licheni nuovi o interessanti per la Toscana e il Centro Italia.

ABSTRACT - New or interesting lichens for Tuscany and Central Italy - Twenty taxa [Arthrorhaphis alpina (Schaer.) R.Sant.,Caloplaca ammiospila (Wahlenb.) H.Olivier, C. cerina (Hedw.) Th.Fr. var. muscorum (A.Massal.) Jatta, C. crenulatella(Nyl.) H.Olivier, Catapyrenium daedaleum (Kremp.) Stein., Cladonia bellidiflora (Ach.) Schaer, Fulgensia fulgida (Nyl.) Szatala, Hypocenomyce scalaris (Ach.) M.Choisy, Imshaugia aleurites (Ach.) S.L.F. Meyer, Megaspora verrucosa var. mutabilis(Ach.) Nimis & Cl.Roux, Miriquidica garovaglii (Schaer.) Hertel & Rambold, Muellerella pygmaea (Körber) D.Hawksw,Ophioparma ventosum (L.) Norman, Pachyphiale fagicola (Hepp) Zwackh, Parmeliopsis hyperopta (Ach.) Arnold, Peltigera elisabethae Gyeln., P. ponojensis Gyeln., Physconia muscigena (Ach.) Poelt var. muscigena, Protoblastenia cyclospora (Körb.) Poelt, Squamarina periculosa (Schaer.) Poelt] new to the lichen flora of Tuscany are reported here; four of these are also new for Central Italy. Additional information is given on some other rare species.