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20-06-2025 08:33

Ascomycete on a herbaceous stem.
Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

11-06-2025 16:26

Literature request
Jason Karakehian Jason Karakehian

Hi everyone, I am looking for the following protol

18-06-2025 19:24

Literature request
Bernard Declercq Bernard Declercq

Good evening,On Oenanthe aquatica we collected  a

17-06-2025 14:23

¿Hyaloscypha?
Josep Torres Josep Torres

Hello.A probable Hyaloscypha from last June 1st, s

18-06-2025 16:24

Anamorphe sur Lycopodium annotinum
Andgelo Mombert Andgelo Mombert

Bonjour,Un minuscule stade imparfait, qui pousse s

13-06-2025 16:34

Strossmayeria-like on Fagus
Andgelo Mombert Andgelo Mombert

Bonjour,Un petit discomycète qui me résiste. Il

17-06-2025 12:10

Scutellinia para ID 1303
Castillo Joseba Castillo Joseba

Del pasado dia 4  en bosque de hayas, en tierraA

12-03-2025 17:54

Scutellinia hyperborea?
Karl Soler Kinnerbäck

Hi all!Do you agree with Scutellinia hyperborea? P

17-06-2025 12:02

Scutellinia para ID 2259
Castillo Joseba Castillo Joseba

Del pasado sabado, en bosque de hayas y avellanos,

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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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