Oregon's Hidden Giant: The 8,650-Year-Old Honey Fungus Spanning 3.7 Square Miles
The world’s largest known organism is a single honey fungus (Armillaria ostoyae) in Oregon’s Malheur National Forest, covering about 3.7 square miles with an extensive underground mycelial network and rhizomorphs. Genetic tests revealed it is a single clonal individual that killed trees by enzymatic decay, and estimates place its age between roughly 2,400 and 8,650 years.
