Heterobasidion occidentale
English Common Name(s): Heterobasidion root rot of fir and hemlock
Taxonomic Rank:Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Subphylum: Agaricomycotina
Class: Agaricomycetes
Order: Russulales
Family: Bondarzewiaceae
Genus: Heterobasidion