There is a giant mushroom in Oregon that is over years old, covers square miles of land, and is still growing - HOWEVER, it is NOT THIS MUSHROOM. The Oregon mushroom looks like many small fungi spread across miles of land.
They have this at the Huntington Gardens in LA - it's a'schmelly, too! The rare Titan flower known in Indonesia as Bunga Bangkay - corpse flower - (Bogor, Indonesia) is said to be the biggest flower in the world. Anyone keen to challenge that?