Page author: Julie Jones
Ischnoderma resinosum
resinous polypore
WTU specimens
Other herbaria

Habitat: Occurs on conifers and hardwoods.

Conservation Status: Not of concern

Identification Notes:

Ischnoderma resinosum is a widespread annual species that occurs as single or imbricate shelf-like caps with even or lobed edges on wood of conifers and hardwoods. When young and actively growing, the fruitbody is rather thick and fleshy, contains a sappy substance, and has a whitish, rounded edge, sometimes with liquid droplets, and a brownish tomentose cap. Later the fruitbodies become hard and corky, dark brown, and concentrically zoned, and the surface develops a dark resinous crust and becomes radially wrinkled. The pores are white to pale brownish and, when fresh, stain dark brown where bruised. Fresh specimens have an aromatic smell and the exposed wood sometimes has an anise-like odor when the fruitbodies are removed. I. benzonium is sometimes recognized as a separate species with darker flesh and occurrence on hardwood.

Accepted Name:
Ischnoderma resinosum (Fr.) P. Karst.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Ischnoderma resinosum in the Consortium of Pacific Northwest Herbaria database.

CalPhotos: Ischnoderma resinosum photos.

3 photographs:
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