Larix decidua
It is only found where the fungus "Phaeolus schweinitzii" grows, and microscopic tests have revealed it is parasitic on that species. The two are found with coniferous trees such as Scots pine ("Pinus sylvestris"), eastern white pine ("P. strobus") and European larch ("Larix decidua"), and less commonly deciduous trees such as wild cherry ("Prunus avium").