Lichens (Ascomycètes lichénisés) nouveaux ou intéressants pour la Suisse et/ou le canton de Genève - 4.

Th is paper is a continuation of the new series started in 2020 aiming at publishing the new or interesting lichenological discoveries made in Switzerland or in the Geneva canton. Lecanora hyperpolytropa, collected in Valais, in 1932 by E. Frey is a new species for Switzerland. Flavoparmelia soredians confi rms its presence in Switzerland by a mass arrival on hackberry trees in the canton of Geneva. Ramalina europeae, belonging to the R. pollinaria group, is a new species for the canton of Tessin. Th e presence in Switzerland of Squamarina subcetrarioides, an old variety of S. gypsacea, is confi rmed by new localities. [ABSTRACT FROM AUTHOR]