ABSTRACTBoletus piperatoides, until now only known from Michigan, is shown to have a transcontinental distribution in North America and is not uncommon in northern California. This taxon is transferred toChalciporusand compared toC. piperatuswith which it is most similar. The description ofC. piperatoidesadds new information to the circumscription of this taxon. A technique for identifying collections ofC. piperatoidesfrom herbarium material is also described.