Classification
(master taxon) [(master rank)]Fungi [kingdom]
Basidiomycota [phylum]
Basidiomycotina [subphylum]
Hymenomycetes [class]
Holobasidiomycetes [subclass]
Agaricales [order]
Tricholomataceae [family]
Armillaria [genus]
Armillaria ostoyae [species]