A new species closely related to Boletus edulis is described as Boletus carpinicola. It was found under hornbeam trees near Lysá nad Labem. It likely forms mycorrhiza with the tree roots and differs from typical B. edulis by its thick, grayish pileus similar to Clitocybe nebularis and brown-tinged stipe resembling Boletus pinicola.
Pilát A. (1967): Boletus carpinicola species nova e proxima affinitate Boleti edulis Bull. ex Fr. – Česká Mykologie 21(2): 61–63.
