Observation 19329: Pholiotina Fayod

On a deep bed of moss at the base of a madrone.

Spores 8.7 × 4.8 μm, ellipsoid, with a germ pore.

Cheilocystidia clyndrical or slightly swollen below, slightly flexuous – NOT tibiiform.

Pileocystidia and caulocystidia apparently similar to cheilocystidia. Pileus with a sheen of v. short hairs in sunlight; presumably due to pileocystidia (visible in 2nd photo), caulocystida strongly tufted at stipe apex.


Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Collapsed pileocystidium, showing strange “knobbed” attachment to hypha
Copyright © 2009 Christian F. Schwarz
Strange “jacketed” pileocystidium
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
I’m pretty sure that these are pileocystida at the margin of the pileus, but this fragment was pretty contorted, so it might have been lamellar (although I didn’t find any basidia around them).

Proposed Names

63% (3)
Recognized by sight: Cellular pileipellis, legeniform cheilocystidia, brown spores, smooth with germ pore.
59% (2)
Recognized by sight
Used references: Flora Agaracina Neerlandica, vol 6. Pholiotina (Arnolds).
Based on microscopic features: Hymeniform pileipellis, smooth brown spores with germ pore, lageniform cheilocystidia, pileocystdia, no veil, spores under 10um on ave.

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= Observer’s choice
= Current consensus


Add Comment
Ah, good -
By: Douglas Smith (douglas)
2009-03-12 23:29:46 CST (+0800)

Ah, that fits then, good. No pleurocystidia, smooth brown spores with germ pore, hymeniform pileipellis, legeniform cheilocystidia – there you go, Pholiotina.

Looks like these are a good match for P. aberrans, so I’ll put that down. First siting for California, perhaps?

Pleurocystidia absent
By: Christian (Christian Schwarz)
2009-03-12 13:39:56 CST (+0800)

My examination of the lamellar faces showed only basidia and basidioles, no pleurocystidia.

More info
By: Christian (Christian Schwarz)
2009-03-12 04:43:51 CST (+0800)

Okay, pileocystidia amongst a cellular derm confirmed. More densely packed at the margin (see photo).
Added photos of pileocystidia/pileipellis, a very weird “jacketed” pileocystidium (only one I found in a quick search), basidia (barely protruding, rather stubby), and pileocystidia at the margin.

spore size
By: Christian (Christian Schwarz)
2009-03-12 04:03:49 CST (+0800)

Okay, the spores are even smaller, I forgot to convert from units to microns. Current size is correct.
As for pileocystidia vs. cheilocystidia, the fragments were pretty small and I could have mixed them up, but I’ll check again right … NOW

Check pleurocystidia…
By: Douglas Smith (douglas)
2009-03-12 03:47:21 CST (+0800)

Ok, it looks like the closest description here is for Pholiotina aberrans. Which seems to be randomly common or not in herbaceous and smally woody debris in Europe, small and usually over-looked.

A big but though, Pholiotina should not have pleurocystidia, are you sure of that? I find in Pholiotina that the basidia are well separated usually by sterile spacer cells, and the basidia tend to project from these, and the immature basidia without sterigmata might look somewhat like clavate pleurocystidia. Except for the description of the pleurocystidia, these are not a bad match for P. aberrans.

Wait – is that shot really pileocystidia?
By: Douglas Smith (douglas)
2009-03-12 03:34:46 CST (+0800)

The second micro-shot you have these, is that really pileocystidia? At first I thought I was looking at cheilocystidia, and the cellular stuff there was imature basidia. If that is pileocystidia, than these have a clearly hymeniform pileipellis. These are Pholiotina, I’ll take a look at what that might be…

Oooh… these are neat…
By: Douglas Smith (douglas)
2009-03-12 03:31:18 CST (+0800)

I hopes you saved these ones… did you check the cap surface? Was it is cutis or cellular? And gelatin on surface or dry?

With the clear germ pore (those are a clear germ pore), not sure these are Galerina. There is Pheogalera with the germ pore, but I haven’t found any of these yet in CA, although that doesn’t mean much. I think for the Pheogalera the cystidia should be capitate to tibiiform, I can’t remember all of those right now, I might look over the descr. later of those. Oh, wait I looked up a drawing of characters for P. stagnina here, and the cystidia are not capitate, but are mostly lageniform to fusoid-ventricose with blunt to acute apecies.

I wonder if these aren’t really Pholiotina with those smooth spores and germ pore. It looks like for Pheogalera and Pholiotina the ave. spore size is usually 12 um or so, although there are some that are smaller. Pholiotina will have the cellular cap surface, so that will be quick to see.

Micro for Doug
By: Christian (Christian Schwarz)
2009-03-12 03:14:10 CST (+0800)

Any ideas, Mr. Smith?