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Armillaria
mellea is not the brightest glowing species on agar culture, however
on wood substrates, the mycelium is reported to glow much brighter.
The phenomenon has been referred to as "foxfire" or "willow the wisp".
Armillaria is a pathogen of trees; whole forests can be wiped out
he invading fungus, leaving "ghost" trees. Rhizomorphs form
extensive underground networks, and genetically identical colonies have
been known to cover areas equivalent to several football pitches, making
this species the largest organism on earth!
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