A number of inedible boletes
are superficially similar in appearance but lack one or more of the key characteristics. The edible Boletus fibrillosus
differs in that the cap is matted with dark fibers and it grows in coastal forests. The edible Butyriboletus regius
differs in that the cap is pink to rose red, the stem is bright yellow, the pores slowly and inconsistently discolor to blue when bruised, and it occurs in coastal forests.