Observation 111967: Bondarzewia occidentalis Jia J. Chen, B.K. Cui & Y.C. Dai

When: 2012-09-11

Collection location: near Echo Summit/Highway 50, California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

These were growing mostly underground under mixed conifers @ ~ 7000 ft.
They also had a deep rooting rather thick sclerotium-type stem which got broken-off.
Was able to get a thin spore drop…they were white, appeared to be inamyloid, globose to subglobose, and quite warted.
Spore size ~ 5.8-6.4 X 5.4-6.1 microns.
The flesh was white, relatively firm, no strong odor and taste was mild
Not sure how to classify them as the white underside seems to be somewhere between pores and teeth.

Proposed Names

-14% (2)
Recognized by sight
-13% (2)
Recognized by sight
83% (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.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Darv,
By: Ron Pastorino (Ronpast)
2012-10-01 21:45:27 PDT (-0700)
I should have used Melzers initially and maybe I would have seen the amyloid reaction a little better.
next time use Meltzers, if you didn’t already…
By: Debbie Viess (amanitarita)
2012-10-01 21:44:28 PDT (-0700)

they are related to Lactarius and have amyloid, ornamented spores. A nice fresh fruit body like this one will also bleed white latex!

By: Danny Newman (myxomop)
2012-10-01 21:38:49 PDT (-0700)

i think i read as much not moments ago and proposed it all the same. thanks, darv.

Not Albatrellus
By: Darvin DeShazer (darv)
2012-10-01 21:31:48 PDT (-0700)

Albatrellus has smooth spores.

Created: 2012-10-01 20:40:54 PDT (-0700)
Last modified: 2017-02-15 20:53:46 PST (-0800)
Viewed: 72 times, last viewed: 2017-10-05 04:15:07 PDT (-0700)
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