Arboretum - Heritage Photography

Amabilis fir, aka Pacific silver fir, Valley Trail, Whistler, BC

Trees are one of the largest living organisms in the world. But according to NG the biggest mushroom in the world, armillaria ostoyae or as it’s been fondly nicknamed the Humongous Fungus is the largest.

Covering 2,385 acres of Malheur National Forest, Oregon, it’s our largest organism, and from the way the fungus has been growing, it may also be our oldest organism. Humongous is estimated to be around 2,400 years – 8,650 years old.