Found in the Wahgi valley Papua New Guinea, it was first described by French mycologist Roger Heim in 1963.

[1] Heim singled out this mushroom largely because of its similar appearance to Rubroboletus satanas.

The word ngimbl in the south Wahgi dialect means pain, which describes the intense bitterness of the mushroom.

[3][4] These were detected by Albert Hofmann, but the quantities were too low to allow for chemical analysis and identification.

[3][5] The indolic compounds would need to be extremely potent, on par with LSD, to account for the claimed hallucinogenic effects of B.