Page author: Regina Johnson
Heterobasidion occidentale
WTU specimens
Other herbaria
WTU images

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

Description:
Identification Notes:

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.

Accepted Name:
Heterobasidion occidentale Otrosina & Garbelotto
Publication: Fungal Biology 114 (1): 20 (2010) [MB#515277] 2010.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Heterobasidion occidentale in the Consortium of Pacific Northwest Herbaria database.

CalPhotos: Heterobasidion occidentale photos.

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