Boletus queletii - The hat is 50 to 150 mm in diameter, hemispherical, in mature specimens, it is scattered, with age in the middle it is deeply submerged, tanned or wrinkled, first ocrowozółty to brownish, then with a reddish shade, usually brick-red to carmine-red, brick orange, with age pales; when pressed, dark patches appear which then brown.
Tubes 15 to 30 mm long, adnate or cut, initially golden-yellow, then olive-yellow. Damaged blue.
Seasons roundish or slightly angular, olive-yellow, later orange-yellow, in the end dirty-olive.
Stem 40 to 150 mm long and 13 to 50 mm thick, lobed to cylindrical, with the base sharpened, the top is yellow, the bottom part is carmine, gently grainy scored, always without mesh.
The yellow pulp, at the base of the purple stem, after breaking it turns blue, with a sour taste and an undetermined odor.
Occurrence: In warm deciduous forests, usually under oaks. From May to October. Very rare in Poland.
Value: Edible mushroom, some sources say it is inedible