Recent molecular studies have shown that Boletus in its current circumscription is likely an artificial grouping and it is possible that it will be split at some point into smaller genera. Note that Boletus impolitus and Boletus depilatus for practical reasons are retained here, although there is strong evidence that they are closely related to Xerocomus subtomentosus and its allies.
Fruitbody large to medium sized, boletoid, without veil and ring. Stipe solid, with surface usually covered with granules or network. Flesh variously coloured, changing or not when exposed to air. Tubes easily separable from each other, not tearing apart. Pores usually small and rounded.
Boletus pinetorum M. Korhonen
Boletus pinetorum is similar to B. edulis, but it has a greyish brown pileus with a wrinkled edge, and grows with Pinus. The caulocystidia of B. pinetorum are lageniform vs. the cylindrical caulocystidia in B. edulis. Boletus pinophilus is also associated with pines but it usually has vinaceous red tinted pileus and mostly cylindrical caulocystidia.
Habitat. Dry sandy pine heaths and dry coniferous forests, mycorrhizal with pines (Pinus).
Distribution. Not yet understood and so far known only in Norway, Finland and Estonia.
I am not currently having photographs of this species. Colour photographs and line drawings of the microscopic features are found in Korhonen & al. (2009).
Korhonen, M., Liimatainen, K. & Niskanen, T. 2009. A new boletoid fungus, Boletus pinetorum, in the Boletus section Boletus from Fennoscandia (Basidiomycota, Boletales). – Karstenia 49: 41–60.