XVI International Botanical Congess

Mycological investigations in Magadan region and Chukotka and literature observation on Kamchatka (Kalamees, Vaasma,1981) revealed that order Boletales on North-East Russia is represented by 7 families (according to Hawksworth et al.,1996): Boletaceae: Boletus-2 species and 3 forms, Leccinum-11 species, Suillus-10 species and 6 infraspecies taxa, Gomphidiaceae: Chroogomphus-2 species, Gomphidius-1 species, Gyrodontaceae: Boletinus-5 species and 2 forms, Paxillaceae: Paxillus-2 species, Rhizopogonaceae: Rhizopogon-1 species, Strobilomycetaceae: Chalciporus-1 species, Xerocomataceae: Xerocomus-1 species. Like that Boletales contains 7 families, 10 genera, 36 species and 11 infraspecies taxa. These are boreal widely distributed species mostly, with Eurasian-American type of area. All species except one, are mycorrhizal symbionts of main trees: Larix dahurica-10 species, Pinus pumila-10 species, with differend species Betula-13 species, Populus suaveolens-1 species, Arctous alpina-1 species.