Log was rotted enough that I can’t be sure what it was, but likely Populus trichocarpa (black cottonwood). That is the dominant tree in the area. There are no conifers in this section of the park.

Many thanks to Judy Roger of the Oregon Mycological Society for the microscopic photos. A few notes that she mentioned with them:

Spores are weakly amyloid
A few clamps on generative hyphae
Spores finely punctate but almost smooth

Species Lists


basidia&cystidia on spine wall 400x.jpg
generative hyphae inside the spines.jpg
spores clumping loosely around some hyphae 1000x 5 lines to right of 9 marker points to a clamp connection.jpg
spores weakly amyloid, finely punctate but almost smooth.jpg

Proposed Names

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Recognized by sight

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Add Comment
By: Danny Newman (myxomop)
2016-09-12 11:08:20 CDT (-0400)
Is the other Gloiodon…
By: Leah Bendlin (Leah Bendlin)
2016-09-12 00:42:27 CDT (-0400)

G. occidentalis? I saw there was a post recently of it on a conifer. This was on cottonwood and the shape looks pretty different.

Yes, I posted her micro photos
By: Leah Bendlin (Leah Bendlin)
2016-09-12 00:40:21 CDT (-0400)

…and notes a few months ago. Alan has a specimen for sequencing, but I don’t think he has gotten to it yet.

By: Danny Newman (myxomop)
2016-09-11 15:27:39 CDT (-0400)

did you ever hear back from Judy? There is another PNW Gloiodon which she may be interested in.

Probably G. strigosus
By: Leah Bendlin (Leah Bendlin)
2016-02-24 23:05:49 CST (-0500)

The area where I collected the mushroom doesn’t really have any conifers. The description for G. occidentalis says it grows on conifers. The log it was on was rotted enough that I can’t say for sure what it was, but it’s likely to be Populus trichocarpa (black cottonwood).

I gave the mushroom to Judy Roger to do some micro work on it, so I will hopefully be able to add images of that at some point. We should be able to save the rest for the OMS herbarium.

Alan Rockefeller also expressed interest in sequencing. I’ll keep the observation updated with any new information.

Gloiodon occidentalis
By: Noah Siegel (Noah)
2016-02-22 09:29:57 CST (-0500)

is also very similar. Alissa found it in Cordova, AK on Western Hemlock this past year. We also saw old stuff in Sitka, AK.
It would be worth comparing it to that species too. The description is on here.

I would scope it
By: Sava Krstic (sava)
2016-02-22 02:49:20 CST (-0500)

There is local expertise too. OMS Mycoflora?

By: Danny Newman (myxomop)
2016-02-22 01:07:06 CST (-0500)

unless someone else wants it who can confirm the ID and post micrographs. if it’s an important record it should probably stay on the west coast. maybe Sava would scope it for us?

I saved it!
By: Leah Bendlin (Leah Bendlin)
2016-02-22 00:47:46 CST (-0500)

Two small pieces. Do you want them?

this is awesome!
By: Danny Newman (myxomop)
2016-02-22 00:25:50 CST (-0500)

please tell me you saved it!

Created: 2016-02-21 23:39:55 CST (-0500)
Last modified: 2016-04-06 23:41:47 CDT (-0400)
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