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31-03-2026 21:18

Lambertella tetrica paper
Miguel Ãngel Ribes Miguel Ángel Ribes

Good evening. oes anyone have the original descrip

31-03-2026 20:57

"Nectria" - for a lack of better knowledge...
Stefan Blaser

Hello everybody, I hope somebody can help me with

26-03-2026 15:31

Hymenoscyphus ombrophiliformis?
Ãke Widgren Åke Widgren

Hello,I found this one in October last year, on r

31-03-2026 16:20

Helotiales from Tanzania
Mlcoch Patrik Mlcoch Patrik

Hello, Please about help with determination. On

31-03-2026 08:19

Daldinia childiae parasité
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

30-03-2026 12:18

Demande d'aide
Sylvie Le Goff

BonjourRécolté sur la base de Pteridium aquilinu

30-03-2026 12:03

Dumontinia on Ficaria?
William Slosse William Slosse

Hello all,On 27/03/26, in Kraaiveld in Wingene (Be

25-03-2026 10:35

Encoelia impudicella?
Hulda Caroline Holte

Hello,I collected this species growing on a dead b

28-03-2026 17:41

Mollisia sur Molinia
Louis DENY

Bonjour forum,Mollisia trouvée sur tige de Molini

30-03-2026 09:53

Lachnum mollissinum ?
Yanick BOULANGER

BonjourVoici des petites fructifications poilues s

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Psilachnum (??) on cut surface of Fagus stem
Andreas Gminder, 16-09-2015 20:18
Andreas Gminder

Hello,


another one which puzzles me.


Macroscopically I thought of an Olla species, because the apothecia were very small and more or less urceolate. But under the dissecting microscope it showed that the hairs were protruding from the excipulum, a little bit similar to Urceolella crispa.


But microscopically it was evident that the hairs are quite inconspicous. Mostly three celled, hyalin, somewhat laceolate (see foto)


Asci with croziers, IKI bb 3


Spores cylindrical, approx. 9-11 x 3-3,2 µm, without oil content.


Interestingly the excipulum contained many granules which stained amyloid in Barals solution!


Found at the cut surface of a lying Fagus stem.


thank you and best regards,


Andreas

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Raúl Tena Lahoz, 17-09-2015 11:17
Raúl Tena Lahoz
Re : Psilachnum (??) on cut surface of Fagus stem
Hi Andreas
This blue-blackish reaction in IKI is often seen in Hyaloscypha. An option for your fungus is H. albohyalina. How are the paraphyses?
Best regards,
Raúl
Andreas Gminder, 17-09-2015 15:28
Andreas Gminder
Re : Psilachnum (??) on cut surface of Fagus stem

Dear Raúl,


thank you for your opinion.
I don't think that it is a Hyaloscypha species, because the hairs don't fit this genus at all, and the spores are completely without oil content. Also all these excipulum cells with a big round bubble inside I have never seen in Hyaloscypha.


best regards,
Andreas

Hans-Otto Baral, 17-09-2015 15:28
Hans-Otto Baral
Re : Psilachnum (??) on cut surface of Fagus stem
My guess goes in the direction of Psilocistella quercina (only an idea). A macro would help.
The iodine reaction I don't know.

The species was recently redescribed based partly on my species concept:

Quijada et al. 2014 Psilocistella quercina AscomyceteOrg 06-05 143-146

Zotto
Andreas Gminder, 17-09-2015 15:31
Andreas Gminder
Re : Psilachnum (??) on cut surface of Fagus stem

Dear Zotto,


thank you very much, I will look in this direction.


I don't have a macro picture because it was too small and when I came home with it it was already dreid out after a few minutes. I should have taken a foto first ....


best regards,
Andreas