Observation 112648: Bondarzewia occidentalis Jia J. Chen, B.K. Cui & Y.C. Dai

When: 2012-10-07

Collection location: MP 14.5 E. Larch Mountain Rd., Multnomah Co., Oregon, USA [Click for map]


Who: Daniel B. Wheeler (Tuberale)

No specimen available

I do not remember ever finding it before. So I’m only calling it “Could Be.” White spore print. Growing out of a well-defined stump, probably Noble fir (no bark). Elevation at least 3900 feet, and likely 3930 +/- 10 feet. About 100 yards from parking lot at top of Larch Mountain Road. Very large pores, I would estimate some are easily 2mm across. Arising from a single root-like base from the stump, and hypogeous to the stump. Several separate but joined shelf-like sporocarps present. Flesh white, thick when sliced. Pores angular, irregular in size and shape, but mostly large. A rather pleasant agreeable aroma, similar to shiitake.


Pore walls thin, usually longer on the downward side of the sporocarp, and shorter and the upward size.
Pore size variable, easily 1mm across (everything), but sometimes as wide as 4mm where several pores come together but don’t quite meet.
Cap brown, felty feeling, somewhat scaley too.
Flesh white, aromatic, similar to shiitake; with maggots; thick.
This photo from a separate floppy disc that I save photos on.

Proposed Names

29% (1)
Used references: Arora, Mushrooms Demystified, p. 565, under Bondarzewia montana. This keys out rather easily to this species. MO says name is deprecated to Bondarzewia mesenterica.
55% (1)
Recognized by sight: New name for the Western North American “Bondarzewia mesenterica”, which is not the same as the European species.
Used references: Chen, J., Cui, B., He, S., Cooper, J. A., Barrett, M. D., Chen, J., … & Dai, Y. (2016). Molecular phylogeny and global diversity of the remarkable genus Bondarzewia (Basidiomycota, Russulales). Mycologia, 108(4), 697-708.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2012-10-07 15:41:24 CDT (-0500)
Last modified: 2017-02-15 22:30:19 CST (-0600)
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