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Health & Science6h 49m ago
A single honey fungus, Armillaria ostoyae, in the Malheur National Forest, has been spreading for thousands of years and now covers nearly 10 square kilometres.
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Blue Mountains, Malheur National Forest, eastern Oregon, United States
Who
Greg Whipple, Forest Service worker, Ferguson, Dreisbach, Parks, Filip and Schmitt (researchers)
What
A single honey fungus, Armillaria ostoyae, in the Malheur National Forest, has been spreading for thousands of years and now covers nearly 10 square kilometres.
When
Sun, 14 Jun 2026 03:16:01 GMT · 6h 49m ago
Where
Blue Mountains, Malheur National Forest, eastern Oregon, United States ·
Why
The fungus is a root pathogen that advances by spreading through tree roots, connecting from tree to tree.
The Frontline Impact
How this affects you
This massive fungus, a root pathogen, kills trees in the Malheur National Forest. Its age and size make it a contender for the largest and oldest living organism on Earth, highlighting the vast and unseen biological networks that influence ecosystems.
Story chain
10 events in this thread- Health & Science6h 49m agoBeneath the Blue Mountains of eastern Oregon, in the Malheur National Forest, a single honey fungus has been spreading through the roots of the forest for thousands of years, now covering nearly ten square kilometres.Open article
- Health & Science6h 49m agoA single honey fungus, Armillaria ostoyae, in Oregon's Malheur National Forest has been spreading through the roots of the forest for thousands of years and now covers nearly 10 square kilometers.Open article
- Health & Science6h 49m agoA single honey fungus, Armillaria ostoyae, in the Malheur National Forest has been spreading through the roots of the forest for thousands of years and now covers nearly ten square kilometres.Open article
- Health & Science6h 49m agoA single honey fungus, Armillaria ostoyae, has been spreading through the roots of the forest in the Malheur National Forest, eastern Oregon, for thousands of years, now covering nearly ten square kilometres.Open article
- Health & Science6h 49m agoBeneath the Blue Mountains of eastern Oregon, a single honey fungus has been spreading through the roots of the forest for thousands of years, now covering nearly 10 square kilometres.Open article
- Health & Science6h 49m agoBeneath the Blue Mountains of eastern Oregon, in the Malheur National Forest, a single honey fungus has been spreading through the roots of the forest for thousands of years, now covering nearly ten square kilometres.Open article
- Health & Science6h 49m agoBeneath the Blue Mountains of eastern Oregon, a single honey fungus has been spreading through the roots of the forest for thousands of years, now covering nearly 10 square kilometres.Open article
- Currently Reading6h 49m agoA single honey fungus, Armillaria ostoyae, in the Malheur National Forest, has been spreading for thousands of years and now covers nearly 10 square kilometres.
- Health & Science6h 49m agoA single honey fungus, Armillaria ostoyae, covering nearly ten square kilometres, has been spreading through the roots of the forest in Oregon’s Blue Mountains for thousands of years.Open article
- Health & Science6h 49m agoBeneath the Blue Mountains of eastern Oregon, in the Malheur National Forest, a single honey fungus has been spreading through the roots of the forest for thousands of years, now covering nearly ten square kilometres.Open article