Definition of honey mushroom in US English:

honey mushroom

(also honey fungus)

noun

  • A parasitic fungus that produces clumps of honey-colored toadstools at the base of trees. The black hyphae invade a tree, causing decay or death and spreading out to other trees.

    Armillaria mellea, family Tricholomataceae, class Hymenomycetes

    • ‘These are highly esteemed, including the ink caps and honey fungus.’
    • ‘They are a pest in the eyes of most foresters, but many, such as the honey mushroom are edible.’
    • ‘The trees are being replaced by another species, hornbeam, because it was feared that the honey fungus disease that has killed the mature specimens would also attack young chestnut trees.’