Observation 196647: Agaricales sensu lato
When: 2015-01-18

Notes: On top of a large redwood log.

Spores 7-9 × 3-4, with apiculus.

June 5, 2015:

The largest cap 2 cm across. No particular odor. Flesh firm.

I did the microscopy twice since the original posting. On both occasions, I was unable to find any gill cystidia, and the spores were smaller: 5-6 × 3-3.5. This size is good for C. abundans, but not perfect; in M. Kuo’s photo (http://www.mushroomexpert.com/clitocybula_abundans.html) and in the description, the spores are nearly round.

My first guess, Collybia bakerensis, was wrong, as people have already pointed out. That has a lot of cheilocystidia, fattier basidia, and clavate caulocystidia.

Mycena galericulata has prominent cheilocystidia that would have been obvious, and much larger spores.

“Christian’s Mycena” (Observation 205781) that grows nearby may be the same thing, but it has cheilocystidia that I would not have missed here. I’m including the photos of the dried material, for comparison; there are differences in color. If the two mushrooms are the same, then are they Mycena or Clitocybula, or something else? I cannot prove this one is not a Mycena, it’s just that it seems that it matches the description of C. abundans more than the description of any Mycena. To add to the puzzle: the spores are amyloid and both the gill trama and pileal trama become vinescent in MLZ, which are all characteristics of Mycena. However, I was not able to see here the layer of inflated cells under pileipellis, which is a must for Mycena.

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Comments

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Whatever it is, Sava,
By: Judi T. (AvidAmateur)
2015-03-12 11:16:28 PDT (-0700)

it’s a beautiful photograph.

I used
By: Christian (Christian Schwarz)
2015-03-11 23:27:11 PDT (-0700)

to consider it a Clitocybula, but I have never seen it develop a lacerate cap

Could this be
By: Noah Siegel (Noah)
2015-03-11 21:51:30 PDT (-0700)

something like Clitocybula lacerata?

yep
By: Christian (Christian Schwarz)
2015-01-20 09:03:46 PST (-0800)

I have been calling it Hydropus in my notes. I don’t know if that’s right either,
but given that all the Collybia s.s. are fungicolous, I don’t think it’s that either.

Not a Mycena
By: Sava Krstic (sava)
2015-01-20 00:35:57 PST (-0800)

I looked at this only briefly last night, just before putting collections in the dryer. I bet it’s not M. galericulata, not even a Mycena, but I’ll need to work a little to prove it.

I’m not sure it’s C. bakerensis either. That “Collyibia” I saw only once and it did not look exactly like the mushroom here. If I remember well, C. bakerensis was more fragile; this is quite solid.

This thing…
By: Christian (Christian Schwarz)
2015-01-19 11:59:48 PST (-0800)

I have found this only at Big Basin, and I’m pretty sure I know which log you found it on too. It seems to be there every time I visit.

I don’t think it’s C. bakerensis though – the stipes are longer, tougher, and more importantly smoother. And when young the entire fruitbody is much more contrasting – the stipe is dark gray and the cap is nearly white. Here are some of what I’m pretty sure is the same: observation 196674
(I’ll put up hi-resolution photos and more details later).

It reminds me most of M. galericulata with the tough stipes, but it doesn’t fit perfectly.

Created: 2015-01-18 23:33:39 PST (-0800)
Last modified: 2017-05-12 03:43:00 PDT (-0700)
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