This lethally poisonous fleshy bolete has a smooth, bun-shaped cap that is almost white. Boletus satanas is best identified by its orange to blood-red pores and prominent yellow to blood-red net pattern. It also has a fat, yellow to red stem.
compact, at first it is hemispheric with an inrolled margin, later flattening in the shape of a pad, and in older specimens it is bent irregularly. The pileus at first greyish white, later more greenish ochre or leather colour. The surface of the cap is finely tomentose, later smooth and often slightly sticky in wet weather. Pores
are small, circular and red, sometimes blood-red, but orange at margin. The free to slightly adnate tubes are yellow then olive, blue where cut. Stem
yellow background covered with a hexagonal close-meshed net that starts bright red and turns dark blood-red. Often very bulbous and usually wider than it is long. When young almost spherical.
(Boletus satanas) on the www.first-nature.com web site.