Subtitle: "The meeting-point"
Armillaria ostoyae (syn: Armillaria solidipes ?) (NL: Sombere honingzwam / EN: / DE: Dunkle Hallimasch / FR: Armillaire d'Ostoya) is a species of fungus in the Physalacriaceae family that parasitizes trees across the northern hemisphere.. It is known to be one of the largest living organisms, where scientists have estimated a single specimen found in Malheur National Forest in Oregon to have been growing for some 2,400 years, covering 3.4 square miles. Armillaria ostoyae grows and spreads primarily underground and the bulk of the organism lies in the ground, out of sight. Therefore, the organism is not visible to anyone viewing from the surface. It is only in the autumn when this organism will bloom “honey mushrooms”, visible evidence of the organism lying beneath. Low competition for land and nutrients have allowed this organism to grow so huge; it possibly covers more geographical area than any other living organism. The mycelium of the fungus attacks the sapwood of nearby growing trees and is able to travel great distances under the bark or between trees in the form of black rhizomorphs. These rhizomorphs allow the fungus to obtain nutrients from long distances away.
Image: Ranst (BE) - 02/11/2011
© Johan Dierckx
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