Armillaria mellea

Armillaria mellea, commonly known as the honey fungus, is a basidiomycete fungus in the genus Armillaria. It is a plant pathogen and part of a cryptic species complex of closely related and morphologically similar species.

Description

Armillaria mellea is characterized by its yellow-brown cap, which can reach up to 15 cm (6 in) in diameter. The stipe is typically 8–20 cm (3–8 in) long and has a distinctive ring. The spores are white and non-amyloid.

Distribution and habitat

The honey fungus is widely distributed in North America and Europe, where it grows in forests and gardens. It is a saprophytic species that decomposes dead wood but can also act as a parasite, causing root rot in various plants.

Pathogenicity

Armillaria mellea is a notorious plant pathogen, causing Armillaria root rot in many species of trees and shrubs. The fungus spreads through rhizomorphs, which are root-like structures that can extend several meters in the soil.

Edibility

Despite its pathogenicity, Armillaria mellea is edible and is collected in many parts of Europe. However, it should be thoroughly cooked before consumption to neutralize potential toxins.

See also

• List of Armillaria species
• Mushroom hunting