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Which fungus is the largest living organism by area?

Quick Answer

A honey fungus in Oregon is often cited as the largest living organism by area. It spreads underground across more than 2.4 square miles, or about 965 hectares.

The Full Story

A honey fungus in Oregon’s Malheur National Forest, Armillaria ostoyae, is widely regarded as the largest known living organism by area. Genetic testing showed that what appears to be many separate mushrooms is actually one interconnected fungal individual. It covers roughly 2.4 square miles, or about 965 hectares. Although the visible mushrooms are small, the underground network is enormous.

Key Facts

1.Species: Armillaria ostoyae
2.Area: about 2.4 square miles / 965 hectares
3.Location: Malheur National Forest, Oregon

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