Slightly to distinctly pink pores on the underside of the bun-shaped brown cap and a dark net on the thick stem are characteristic of this bolete. It is also distinguished by a very bitter taste.
snuff- or fulvous-brown; convex or bun-shaped, at first slightly downy then smooth and dry. Flesh whitish, with pinkish tinge beneath cap cuticle, unchanging, thick and firm. Stem
pallid background with brown reticulation, stout and slightly bulbous. The mushroom has no ring.
When young this is easily mistaken for Boletus edulis, except that it is very bitter and has a dark stem net.
on the MushroomExpert.Com Web site.