Phlebopus marginatus, known as the salmon gum mushroom in Western Australia, is a member of the Boletales or pored fungi and possibly Australia's largest terrestrial mushroom with the weight of one specimen from Victoria recorded at 29 kg (64 pounds). It is an imposing sight in forests of southeastern and southwestern Australia. Initially described as Boletus marginatus in 1845, and also previously known by scientific names such as Phaeogyroporus portentosus and Boletus portentosus it is in fact not as closely related to typical boletes as previously thought.