All boletes are mycorrhizal.  They usually have a bun-shaped cap.  Beneath the cap are pores.  Lining the inside of the pores are the spore producing structures.  Several boletes are considered choice edibles.  Several will not be well-tolerated by your digestive system.  Unless you are immune compromised, it is unlikely that any will kill you, although Boletus Huronensis will make you quite ill. The classic edible bolete is Boletus edulis. Boletus edulis is mainly a European and western U.S. mushroom that primarily grows under pines.  There are several bolete species that are frequently misnamed Boletus edulis, but nearly all are equally delicious just the same.  In the east, most of what we call B. edulis is either Boletus nobilis, B. pinophilus and B. variipes or some other species.  They grow under oak.  All exhibit some white reticulation on the stem and have roughly the same bun shape cap and swollen base, though the cap color may be pale tan rather than a rich reddish brown. 045-001

« Called C. fallax in the east, they are genetically the same as C. cornucopioides, despite having a pinkish or yellowish spore print and different size-spores. They have been considered mycorrhizal because of their outdated taxonomic association with chanterelles, but are now thought to be sabrobic, though they may have an association with moss, where they are often found. They grow under both hardwoods and conifers. 044-001
EDIBLE MUSHROOMS & POISONOUS LOOK-A-LIKES by Dianna Smith
Looks good to eat and is often confused by beginners for Boletus edulis, but this species is extremely bitter. The difference between the two is that Boletus edulis types have a white reticulation and Tylopilus felleus has brown reticulation and like other members of the Tylopilus group - pinkish pores. 046-001 »