This is one of the most distinct Suillus
species. The photos here represent two collections that fit the "local
concept" of Suillus sibiricus, a World apart. The first is from
Oregon and the other from Bulgaria. Out in the North American West,
Suillus. sibiricus is found under Larix or Pinus
monticola. The reddish scales near
the pileus margin and the red discoloration at the bruised lower stipe are
cited as distinctive characteristics.