Distribution: Widespread in western North America from Alaska to southern Mexico.

Habitat: Coniferous forests, wherever hosts are present: Abies, Sequoiadendron, Tsuga, Pseudotsuga, and Picea. Generally inside stumps, at the base of snags or on the undersides of logs.

Substrate: Coniferous wood.

Origin: Widespread in coniferous forests.

Conservation Status: Not of concern

Differs from Fomitopsis mounceae in thinner, rougher, sulcate cap, sharper margin, and never a red band. Differs from Heterobasidion irregulare primarily by host preference: H. irregulare is found on pines, junipers, and incense cedars.