Pertusaria pertusa Pertusaria pertusa, Kullaberg (Sweden). Photo: Lars Salomon. CC BY-NC 4.0. Pertusaria pertusa, Kullaberg (Sweden). Photo: Lars Salomon. CC BY-NC 4.0. Pertusaria pertusa, Nällåkra (Sweden). Photo: Lars Salomon. CC BY-NC 4.0.
