Reticulated boletus – synonymous names (regional) as with the boletus
first-class mushroom. It has a hat with a diameter of 6…30 cm, brighter than boletus, pale brown to hazel brown in color, often with a whitish border, also greyish brown or ocher gray, almost smooth under the magnifying glass, a bit sticky in rain, initially semicircular, then convex, cushiony. Tubes almost white at first, then yellowish-greenish. The pores are white or white-gray at first, later quickly taking on a yellow-greenish color, at the brim of the hat, sometimes pink-reddish. Stem from pale gray to light brown, bulbous, then club-shaped or even cylindrical, usually narrower than that of the boletus, with a whitish mesh. White flesh, light brown under the skin, with a pleasant smell and taste. Light olive spore discharge, brighter than boletus.
It grows most often under oaks, it's mine, in deciduous forests, sometimes in coniferous forests. It is associated with warm areas, more common in the lowlands; it does not occur in high mountain areas. It is collected from May to September.
Reticulated boletus is often not distinguished from the boletus and poisonous boletus. Birch boletus is a similar species. He has a bright hat, almost whitish or light brown, and the body is pale. Occurs under birch trees, rare in Poland.