Boletus bicolor is a red and yellow medium to large bolete. The yellow pore layer is very shallow. The apex of the stem is yellow while the base is colored like the cap. There may be a few different varieties of Boletus bicolor. I’ve heard it said that Boletus bicolor doesn’t stain blue, but the yellow pore surface can stain bright blue. The flesh, however, is slower to stain and when it does it is a comparatively pale blue color. The two-colored bolete appears mainly in summer and is a prized edible. Not everyone can tolerate eating them though and these people may experience stomach upset and diarrhea. It is mycorrhizal with oaks and other hardwoods. 047-001