Observation 144238: Rhodocollybia butyracea (Bull.) Lennox
When: 2013-08-29
No herbarium specimen
0 Sequences

Until I saw the pale pinkish/yellowish spore print, I thought these were G. dryophyla. In needle duff under White Pine.

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44% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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That would be great!
By: Jacob Kalichman (Pulk)
2017-01-04 10:26:04 PST (-0800)

Your attention to these would definitely contribute to MO’s understanding of them. I was very happy to be able to compare a bunch of local specimens in person yesterday… but apparently your Eastern dryophilus can be a lot more butyraceaesque.

Oh, right…
By: Dave W (Dave W)
2017-01-04 08:40:52 PST (-0800)

I forgot about the “serrated gills” criterion. Thanks. Photo misses this aspect.

Looking at a few sources, I see there is a significant difference in spore dimensions for dryophilus and butyracea. I also see that butyracea spores are dextrinoid. I found the mushrooms seen in this observation on my property, in an area where dryoplilus also occurs. Maybe next summer I’ll get the opportunity to provide a definitive proposal regarding this type.

Looking closer…
By: Jacob Kalichman (Pulk)
2017-01-04 07:51:17 PST (-0800)

I can imagine the gills being serrated. Dialed back my doubt.

I can see why…
By: Dave W (Dave W)
2017-01-04 07:34:21 PST (-0800)

G. dryophilus may be considered. But I do not see why R. butyracea should be doubted. Spore print seems darker and with more of a pinkish component than I’d expect for dryophilus.

Created: 2013-08-30 16:30:06 PDT (-0700)
Last modified: 2017-01-04 08:41:10 PST (-0800)
Viewed: 57 times, last viewed: 2017-06-16 09:39:13 PDT (-0700)
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