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27-03-2026 10:47

Stictis cf. friabilis and literature request
Ã…ge Oterhals

I have tentatively identified this Stictis to S. f

28-03-2026 07:55

White Orbilia with allantoid spores
Marc Detollenaere Marc Detollenaere

Hello everybody,Yesterday I found a number of whit

26-03-2026 15:31

Hymenoscyphus ombrophiliformis?
Ã…ke Widgren Ã…ke Widgren

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

27-03-2026 15:23

Trichopezizella barbata?
Gernot Friebes

Hi,this Trichopezizella deviates from typical T. b

25-03-2026 10:35

Encoelia impudicella?
Hulda Caroline Holte

Hello,I collected this species growing on a dead b

27-03-2026 15:08

Coelomycete on Cirsium
Gernot Friebes

Hi,I'm looking for help with this coelomycete on C

24-03-2026 21:37

Helminthosphaeria
Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

26-03-2026 12:50

Pseudombrophila
David Chapados David Chapados

Hi,I'm having a hard time figuring which Pseudombr

26-03-2026 11:17

asco in Ulmus
Vasileios Kaounas Vasileios Kaounas

Found 11-03-26, in leaf of Ulmus sp. Diameter 2-4

25-03-2026 22:23

Orbilia with resin deposits
Marc Detollenaere Marc Detollenaere

Dear Forum,On a debarked stem of Tilia, we found s

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Asco sur branche pourrie de noisetier (Corylus avellana)
Bernard CLESSE, 14-02-2017 23:46
Bernard CLESSEBonsoir à tous,

La semaine dernière, j'ai trouvé cet asco ressemblant fort à un Peziza sur branche pourrie de noisetier (Corylus avellana).

a) asques octosporés, à spores unisériées, IKI- 
b) spores elliptiques, remplies complètement de petites gutttules, lisses : 19-24x7-9
n.b. : certaines spores présentent un petit apicule à chaque extrémité (germination de spores secondaires ??)
c) paraphyses filiformes, septées, ramifiées, à contenu réfringent vers l'extrémité

Pas d'idée…

Bernard
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Bernard CLESSE, 14-02-2017 23:48
Bernard CLESSE
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Peut-être un Rutstroemia ??

Bernard
Hans-Otto Baral, 15-02-2017 07:40
Hans-Otto Baral
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Hi Bernard
could you show us a photo of an ascus tip in IKI? This reminds me of Rutstr. alni from the alps.
Zotto
Martin Bemmann, 15-02-2017 11:06
Martin Bemmann
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Dear Zotto,

there are IKI- ascus tips in the third picture.

regards
Martin
Hans-Otto Baral, 15-02-2017 11:20
Hans-Otto Baral
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Dear Martin
I am unable to see that :-(
Zotto
Martin Bemmann, 15-02-2017 11:23
Martin Bemmann
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
sorry, it is the fourth picture....
Hans-Otto Baral, 15-02-2017 11:28
Hans-Otto Baral
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
yes, I see the remark "IKI", but I do not see any IKI. This may be a similar case as in the recent Pezicula which was also said to be negative. Bernard, could you add so much Lugol that a yellow colour stains the plasma inside the ascus?
Bernard CLESSE, 15-02-2017 11:33
Bernard CLESSE
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Hello everyone,

Indeed the asci are IKI- but I will try again by putting more lugol and leaving perhaps a little more time in order to see a possible change at the top of the asci
I doubt even though it is a Rutstroemia because I find that apothecia is not thick towards the base and the stem here is short and not thick like usual in this genus.


See you this evening.

Bernard
Bernard CLESSE, 15-02-2017 18:24
Bernard CLESSE
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Hi Zotto,

I don't know how it's possible today but the asci are IKI+. Here are some pictures.

Diameter apothecia : 1,5 cm maximum

Bernard
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Hans-Otto Baral, 15-02-2017 18:49
Hans-Otto Baral
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Great. I assume you don't have the desciption of R. alni?

Could you  please tell me the collection data? How sure is Corylus?
Bernard CLESSE, 15-02-2017 19:08
Bernard CLESSE
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
Hi Zotto,

If I understand well,  you tell me it's Rutroemia alni ?

Indeed, I dont 'have the description of this species. Is it a rare species ?

I am practically sure that the host is Corylus avellana but I will ask the opinion of others mycologists. 

Then I'll give you dat collection. 

Bernard
Hans-Otto Baral, 15-02-2017 20:03
Hans-Otto Baral
Re : Asco sur branche pourrie de noisetier (Corylus avellana)
You can try a radial section of the wood, then you will find the following ladder-like structure.

 You can look at my alni folder. There is also a sample by Patrice from lowland. And Breitenbach's R. firma (153) seems to be alni too, and they say Corylus.

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