From Underland by Robert Macfarlane:
In the underland of the hardwood forests of Oregon’s Blue Mountains there exists a honey fungus, Armillaria solidipes, that is two and a half miles in extent at its widest point, and covers a total lateral area of almost four square miles. The blue whale is to this honey fungus as an ant is to us. It is a deeply mysterious organism: the largest in the world that we know of, and one of the oldest. The best guess that US Forest Service scientists have been able to offer for the honey fungus’s age is between 1,900 and 8,650 years old. The fungus expresses itself aboveground as mushrooms with white-flecked stems rising to tawny, gill-frilled cups […] All taxonomies crumble, but fungi leave many of our fundamental categories in ruin. Fungi thwart our usual senses of what is whole and singular, of what defines an organism, and of what descent or inheritance means.
Armillaria solidipes is a synonym for Armillaria ostoyae.
Nehaveigur 