Boletus pseudosensibilis?
By Jordan Pond in Shrewsbury MA
Page 2

Section.  Note that the stem flesh is yellow the cap flesh is white.  Blue staining of the pores going into the cap flesh.  The outside of the stem also turned quickly blue but the inside remained yellow without staining.

I boiled the mushroom for about half an hour in water.  The blue stain washed away.  The stem pieces remained yellow even after cooking.

The spore print looked olive brown to me.

Spore measured 11.5 x 4.8 microns