When: 2008-10-21

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

Who: Daniel B. Wheeler (Tuberale)

No specimen available

White gills, deep rooting stalk about 6.5 inches long, twisted, fibrous, with yellow-tint to stalk, especially that portion underground; cap 3.5 inches across, mostly white, some fine fibrils, especially near the edge of the cap; center depressed and somewhat reddish-stained; gills pure white; probably growing in well-rotted wood, but hard to tell in that area because wood was everywhere anyway. I was thinking Oudemansiella or similar fungus, but this doesn’t key out easily in Aurora: mostly because of the yellow tint to the stipe, but also that long tapering mostly underground stipe. I had no idea it was going to be that long when I started digging it up. I’m still not sure I got the whole thing.


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Just went through the other R. maculata collections here.
By: Daniel B. Wheeler (Tuberale)
2012-02-15 17:00:20 MST (-0700)

It appears to my eye that there are at least 2 different species represented. Material from France doesn’t appear to have a deeply-rooting stipe at all. One species seems to have mostly white gills with some minor reddish blushes on stipe and pileus. The other seems to mostly yellowish stains/blushes, with yellowish gills and sometimes yellowish pileus as well.

Of course it is
By: Paul Derbyshire (Twizzler)
2008-11-13 22:19:41 MST (-0700)

though it will take at least one other vote, and/or votes against “Agaricales sp.”.

Perhaps the site should count votes for a larger clade towards an enclosed clade…

Re: my earlier remark, I was not meaning to suggest that this actually might be Oudemansiella radicata, but rather that the specific feature of “has a long rooting stipe” was not inconsistent with Oudemansiella as seemed to have been suggested at the time.

I’ll accept Rhodocollybia maculata
By: Daniel B. Wheeler (Tuberale)
2008-11-12 20:53:53 MST (-0700)

especially with two such expert opinions. (Always like to get more than one – for everything if possible). Shall I destroy this observation and then rename it? Or does someone want to name it possitively themselves? Is that even possible with the Agaricales naming?

Rhodocollybia maculata
By: Darvin DeShazer (darv)
2008-11-11 19:34:17 MST (-0700)

I agree with Irene – Rhodocollybia maculata is what comes to mind. Sometimes the red stains are not present in west coast material.

No basal mycelium
By: Daniel B. Wheeler (Tuberale)
2008-11-11 10:03:56 MST (-0700)

at the soil level for this fungus. At least the bottom half of the root is completely buried.

White gills
By: Irene Andersson (irenea)
2008-10-24 04:42:03 MDT (-0600)

A Phaeocollybia with white gills, wouldn’t that be a Rhodocollybia then?
It reminds a lot of Rhodocollybia maculata (but still without reddish spots).

By: Daniel B. Wheeler (Tuberale)
2008-10-24 03:55:07 MDT (-0600)

It would be normal for O. radicata, which is typically associated with redwoods. There were no redwoods within 30 miles that I know of (although one of my neighbors does have one in his back yard). Nor is this a snowbank mushroom. Nor was it found in the spring. So, everything considered, I don’t think Oudmansiella is probably out. At least the species found in Mushrooms Demystified.

I think I’ll have to take a collection the next time I get up there, if I can even find it again. Maybe it’s a Phaeocollybia with white gills (as if).

Long rooting stipe…
By: Paul Derbyshire (Twizzler)
2008-10-23 07:17:22 MDT (-0600)

…is normal for O. radicata