Lichens from three mountain sites in Khorasan provinces, Iran, including four species new to Iran

46 Species of lichenized fungi are reported from Kopet Dagh and Ala Dagh in northern Khorasan and Razavi Khorasan, Iran. Among these Diplotomma pharcidium, Lecanora subrugosa, Rinodina zwackhiana and Seirophora austroarabica are newly recorded for Iran and eight species newly for the respective provinces. A north-eastern element in the Iranian lichen flora is postulated, including Anaptychia roemeri and Seirophora orientalis.