Observation 95106: Psathyrella (Fr.) Quél.

When: 2012-05-20

Collection location: Tlemcen, Algeria [Click for map]

Who: Souhila Aouali

No specimen available

Proposed Names

54% (1)
Recognized by sight
Used references
58% (2)
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thank you :)
By: Souhila Aouali
2013-08-28 22:44:23 SAST (+0200)

I got the email and the link and I already downloaded the book. I’ll have new tracks to investigate ! Unfortunately, and as I said before, we still did not receive the micrometer for our microscope, and so measurements cant be done. I hope this will change soon and we’ll be able to identify this Psathyrella which remained non indentified for 1 year ;) . I want to ask, if there is any possibility to send some specimens to the mushroom observer community for ID or confrmation of ID.

I am working alone, and it is a bit hard, and I sometimes drop down, but being part of a community of same interest is very important to me.

Thank you again :)


By: Byrain
2013-08-28 22:09:00 SAST (+0200)

That is a good key, but it doesn’t contain many Psathyrella species, I’m not sure how useful it will be by itself for your area. I sent you some additional literature so check your e-mail. :)

And those are good notes too, but we need measurements, spores are essential and measurements of cystidia are often important too. So far I can tell you that the spore and cheilocystidia shape is close (Perhaps not the encrustations though?), as is the macro, but the entire group shouldn’t have pleurocystidia. Though if they’re only present on some gills and absent most of the time, then maybe we can still consider species in subgenus Candolleana and I would think its not cheilocystidia if it is that well attached to the gill face as shown in your picture. Also, pileocystidia would be unusual for P. candolleana, has anyone else seen or heard of this?

Lastly, here are some observations with microscopy from California that fit Smith’s concept of P. candolleana which you can compare with. obs 121615, obs 115140, obs 64612, & obs 77968. And I’m not sure if the first of those represents the same P. candolleana as the other three….

Sorry that this is not much help…

Thank you Byrain :)
By: Souhila Aouali
2013-08-28 20:22:38 SAST (+0200)

I reiterate the Psathyrella after quite long time. I came across a psathyrelles European key developed by “Andreas Melzer” (Germany I think), on-line in pdf format, with a date of last update 23/04/2012. It is based more on microscopic characters and takes into account all the revisions made in this genus:

www.vielepilze.de / Selten / PSAT / key / ekey.pdf

I then did some work on my specimen:

1-after treatment with sulfuric acid spores are white / discolored
2-pilleipellis in hymenoderme.
3-treatment of spores in KOH shows smooth wall (refraction) + germ pores.
4-microscopy showed the following:

a-clamp connections found in the elements of the veil (reminds of veil were attached to the edges of the cap)
b-cheilocystidia have incrustations
c-in some pictures we can see pleurocystidia, (you can see them at the bottom, in opposite of cheilocystidia )but I am not sure, because I’ve been told that they might be cheilocystidia that dettached and slided under the preparation (so I dont know how I can be sure, I was careful with the preparation)
d-I found a lot of spheropedonculate cells across the hymenium.
e-found kind of cystidia on the cap (pileus)
f-looked at the stipe, saw things but not sure they are caulocystidia!

Didnt make any measurements, our microscop does not have micrometer; it should come soon !

Well, this is all what I was able to do until now !

Could this make any new opinion?

Thank you in advance :)

Nice micro
By: Byrain
2013-08-28 17:37:47 SAST (+0200)

If this has pleurocystidia you should be able to rule out all of Psathyrella subgenus Candolleana including P. candolleana itself. How big are the spores? Since you can do the work it would be great if you can also get pictures of the pileipellis and caulocystidia. :)

Thank you Alan !
By: Souhila Aouali
2012-05-22 23:04:39 SAST (+0200)

Yes most probably Psathyrella; I’ll start prospecing in this genus!


Created: 2012-05-20 20:33:40 SAST (+0200)
Last modified: 2013-08-28 17:37:59 SAST (+0200)
Viewed: 58 times, last viewed: 2017-06-13 07:28:44 SAST (+0200)
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