Seven lichen species new to Poland

Biatora pontica, Buellia violaceofusca, Catillaria croatica, Parmelia ernstiae, Placopsis lambii, Protoparmelia oleagina and Scoliciosporum curvatum are recorded as new to Poland. Most reported species represent a group of crustose, often sterile lichens where secondary chemistry plays an important role in the taxonomy. Characteristics of each species, notes on similar taxa, distribution, and habitat are provided.