Boletus cisalpinus?

Boletus cisalpinus?

Observation - Boletus cisalpinus?. Description: Bolete with cap 10cm. Pores yellow. Slowly turning blue when cut/bruised. Growing in grassland but not too far from a large oak tree.

Bolete with cap 10cm. Pores yellow. Slowly turning blue when cut/bruised.
Growing in grassland but not too far from a large oak tree.