Perenniporia subacida

Perenniporia subacida is a species of poroid fungus in the family Polyporaceae. It is a plant pathogen that infects Douglas firs. The fungus was originally described in 1885 by American mycologist Charles Horton Peck. Marinus Anton Donk transferred it to the genus "Perenniporia" in 1967. The four varieties of this fungus originally proposed by Peck, namely "Polyporus subacidus" var. "stalactiticus", "P. subacidus" var. "tenuis", "P. subacidus" var. "tuberculosus" and "P. subacidus" var. "vesiculosus", have been shown to be synonyms. The species is inedible.