Heterobasidion irregulare
annosus root rot
WTU specimens
Other herbaria
WTU images

Distribution: Widespread in North American coniferous forests, wherever hosts are found: Pinus, Juniperus, Calocedrus.

Habitat: Coniferous forests, wherever hosts are present: Pinus, Juniperus, Calocedrus. Generally inside stumps, at the base of snags or on the undersides of logs.

Substrate: Coniferous wood, rarely hardwoods.

Conservation Status: Not of concern

Identification Notes:

Differs from Fomitopsis mounceae in thinner, rougher, sulcate cap, sharper margin, and never a red band. Differs from Heterobasidion occidentale primarily by host preference: H. occidentale is found on firs, hemlocks, spruce, and Douglas-fir.

Accepted Name:
Heterobasidion irregulare Garbelotto & Otrosina
Publication: Fungal Biology 114 (1): 20 (2009) [MB#515278] 2010.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

CalPhotos: Heterobasidion irregulare photos.

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