A review of the genus Bulbothrix Hale: the species with medullary norstictic or protocetraric acids

This study presents data of eight Bulbothrix (Parmeliaceae, Lichenized Fungi) species containing norstictic or protocetraric acid in the medulla. The current species delimitations were confirmed. New synonyms are proposed, new characteriscts are detailed and range extensions are added.