Armillaria borealis    Marxm. & Korhonen 

common name(s) : Northern Agaric 

New classification: Basidiomycota/Agaricomycotina/Agaricomycetes/Agaricomycetidae/Agaricales/Physalacriaceae  
Former classification: Basidiomycota/Homobasidiomycetes/Agaricomycetideae/Tricholomatales/Tricholomataceae/Clitocyboideae/Clitocybeae  

edibility : discard

potential confusions with  Armillaria borealis toxicity of Armillaria borealis genus Armillaria  

The cap is ochre-brown pale yellowish ochre. The cap surface is scaly, not viscid nor sticky.

The stem is rather club-shaped than bulbous, with a membranous ring.

The flesh is unchanging; its texture is fibrous.

The gills are decurrent, crowded . The spore print is white. This species is saprophytic, sometimes parasitic. It grows on wood, sometimes still alive.

The fruiting period takes place from July to November.
Dimensions: width of cap approximately 7 cm (between 2.5 and 10 cm)
  height of stem approximately 10 cm (between 6 and 15 cm)
  thickness of stem (at largest section) approximately 10 mm (between 5 and 15 mm)

Distinctive features : striate margin; fragile white ring; in cold climates

Armillaria borealis is still unreported so far in the forest of Rambouillet, and is infrequent, more generally speaking .



page updated on 14/01/18