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Plants Strike Back
Episode 9 of 16
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Wild Things

This giant fungus is eating entire forests

It's a single, sprawling organism living underground and destroying trees

By Smartasaurus· 1 min read Wild

Deep under the pine needles of an Oregon forest

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The short version
  • It's a single, sprawling organism living underground and destroying trees
  • The only visible clues to its presence are small clumps of honey-colored mushrooms that sprout from the base of infected trees in the fall.
  • Despite its destructive nature, the fungus is essential to the forest's life cycle.

The Armillaria ostoyae, or the Humongous Fungus, spans 2,385 acres of the Malheur National Forest. Blue whales and giant sequoias are tiny compared to this single mushroom.

Most of the organism is invisible, living underground as a massive web of black, shoe-string-like filaments called rhizomorphs. These threads creep through the soil, seeking out the roots of evergreen trees.

Once it finds a host, the fungus invades the root system and begins to decay the tree from the inside out. It siphons nutrients to fuel its own expansion across the mountain range.

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This plant makes you feel agony
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This plant makes you feel agony

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