When: 2019-06-21

Collection location: Property at 239 Golf Course Rd., Hunlock Twp., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

Sacttered small groups in grass/moss.


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Yeah, the gills…
By: Dave W (Dave W)
2019-06-22 10:44:22 CDT (-0400)

appear to be somewhat deformed, but the major characters expected for R. fibula are all there… widely spaced, decurrent, cream, crossveined. This mushroom is the same one as the relatively large red one seen in the in-situ pair labeled “C1”. (Originally I had posted the gill-shot as “B3”, but it should be “C3” as it now appears in the observation.) Note that this large red one has a cap that’s kinda strangled along the margin. That’s apparently what squeezed the gills into the odd formation. Also, one may surmise that the deep scarlet color and lack of marginal striations correlate with the cap failing to fully expand (or perhaps waiting to expand). The smaller one alongside this one (in-situ C1) is also unexpanded and fairly vividly scarlet. Both of these fruit bodies have stipes with tiny white fibrils overall (as expected with R. fibula). These mushrooms were observed only a few hours after an extended period of heavy rainfall, which is the likely cause of abnormal cap development.

Added one photo of the large red one (C2).

None of the mushrooms seen here in this observation are Xeromphalina, which is one similar thing that comes to my mind. Absolutely no wood present in the area where they were found; mossy lawn. Mycena acicula… found nearby a week or so ago, does not have decurrent gills with prominent crossveins.

Scoped the spores this morning (from a drop). Not sure which fruit body they came from, but the morphology matches R. fibula… elliptical, lengths under 6 microns, Q~2.0, one to two guttules. (Photo is not very good so I won’t post it.)

I’d bet $20 (my personal limit) these are all R. fibula. But, the provocations for me to look more closely have caused me to realize this observation of a very common species is actually kinda interesting!

Interesting gills on that second to last photo.
By: Jacob Kalichman (Pulk)
2019-06-22 08:56:29 CDT (-0400)

Never seen that on Rickenella before!