The lichens from the City of Petrozavodsk in the Herbarium of the Botanical Museum, University of Helsinki
A historical lichen collection in the Herbarium of the Botanical Museum, University of Helsinki, collected in the 19th and 20th centuries from the territory of Petrozavodsk (Republic of Karelia, Russia) was examined. A revision of 354 herbarium packets containing 674 specimens resulted in a list of 227 species of lichens and lichenicolous or non-lichenized saprobic fungi. Our historical list added 102 new species to the lichen flora of the city, which now contains 330 species. Xylographa trunciseda is a new lichen record for North-Western Russia. Seven species were registered for Karelia for the first time. 40 species are new to the biogeographic province Karelia olonetsensis and four species – to Karelia onegensis.