Polypore survey of Finland 4. Phaeolus, Fistulina, Ganoderma and Ischnoderma

TUOMO NIEMELA and HEIKKI KOTIRANT A NIEMELA, T. & KOTIRANTA , H . 1986: Polypore survey of Finland 4. Phaeolus, Fistulina, G anoderma and Ischnoderma.-Karstenia 26: 57-64.The Finnish distribution is mapped for five polypore species.Phaeolus schweinitzii (Fr.)Pat. has rare occurrences almost throughout the country, mainl y on Larix sibirica and Pinus sy/vestris.Fistu!ina hepatica Schaeff.: Fr. is strictly Hemiboreal , growing on Quercus robur and (one record) Castanea sativa.Ganoderma lipsiense (Batsch) Atk .(G. app!anatum) is a polyphagous saproparasite, common in the Hemiboreal and Southern boreal zones and rarer in the Middle boreal zone.Ganoderma lucidum (Curt.: Fr.) Karst.fa vours large stumps of Alnus glutinosa and has rare occurrences in the Hemiboreal and Southern boreal zones only.Ischnoderma benzoinum (Wahl.)Karst. is distributed over the whole of Finland , but is common only in the south.It grows mostl y on Picea abies, less often on Pinus sylvestris, and exceptionally on a few other hosts.None of these fungi cause notable economic losses as decaying agents.