Observation 74040: Bondarzewia occidentalis Jia J. Chen, B.K. Cui & Y.C. Dai

Large cluster of stalked polypores that looked much like faded brown Laetiporus sp. at first glance. The tan colored cap and large, visible pores- and the fact that they are very fresh specimens proves otherwise. Fruiting from a large conifer stump with salal bushes.

Could either be Albutrellus sp. or Osteina obducta. 5th image shows specimen I brought home with yellow discoloration on pore surface and white spore print on the table top.


Final image showing brownish, yellow staining(one day later) and white spore deposit.

Proposed Names

32% (2)
Used references: Mushrooms Demystified (Polyporus, Albatrellus key) pg. 555
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


Add Comment
Osteina obducta
By: Alan Rockefeller (Alan Rockefeller)
2011-09-21 02:44:16 CDT (-0400)

I don’t think this is Osteina obducta – The pores are too large and the cap surface is the wrong color.

Created: 2011-08-16 02:19:10 CDT (-0400)
Last modified: 2017-02-16 00:43:43 CST (-0500)
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