 Suillus sibiricus has been recorded in parts of Europe , North America and Siberia . The fungus forms strict ectomycorrhizal associations with pines of the subgenus <unk> . These include Swiss pine ( Pinus <unk> ) in the Alps and Tatras of central Europe , Macedonian pine ( P. <unk> ) in the Balkans , western white pine ( P. monticola ) and limber pine ( P. flexilis ) in the Pacific Northwest of North America , P. banksiana in Quebec , Canada , and Siberian pine ( P. sibirica ) and Siberian dwarf pine ( P. pumila ) in Siberia and the Russian Far East . The range of the fungus is hence limited by the distribution of the host tree . S. sibiricus has also been shown to be able to form ectomycorrhizae with the Himalayan species P. <unk> in pure culture conditions in the laboratory . 
