- Boletus americanus Peck

- Boletus sibiricus (Singer) A.H.Sm.

- Ixocomus americanus (Peck) E.-J.Gilbert

- Ixocomus sibiricus Singer

- Suillus americanus f. helveticus (Singer) Klofac

- Suillus americanus f. himalayensis (B.Verma & M.S.Reddy) Klofac

- Suillus americanus f. pseudosibiricus Klofac

- Suillus americanus f. sibiricus (Singer) Klofac

- Suillus himalayensis B.Verma & M.S.Reddy

- Suillus sibiricus (Singer) Singer

- Suillus sibiricus subsp. helveticus Singer