12-11-2025 09:25
Viktorie Halasu
Hello, I need help with a pale terrestric Pseudom
11-11-2025 20:16
Bohan JiaHi, lastly I have found these tiny yellow decayin
09-11-2025 13:20
Josep Torres
Hello.A tiny ascomycete, appearing as erupting gra
08-11-2025 00:29
Francois Guay
I found this species in Quebec, Canada, on herbace
Pyrenomycet on Corylus avellana.
Per Marstad,
18-12-2017 10:41
Hello.I would like a name on this.
Spores 15x6 my.
Asci 150x7
Greetings, Per
Gernot Friebes,
18-12-2017 10:53
Re : Pyrenomycet on Corylus avellana.
Hi, Per,
it looks like a Hypoxylon, e.g. H. fuscum, which is very common on Corylus. If you can, please put a piece of the stroma in a drop of KOH and observe the KOH-extractable pigments. For further infos also see here: http://pyrenomycetes.free.fr/hypoxylon/html/Hypoxylon_fuscum.htm
Best wishes,
Gernot
Jacques Fournier,
18-12-2017 15:31
Re : Pyrenomycet on Corylus avellana.
I agree with Gernot, it might be H. fuscum but the spores you show have a conical cellular appendage at base, which is unknown in Hypoxylon.Make sure they come from the stromata you show on pics 1-2.
Ascospores of H. fuscum are also distinctive in having a sigmoid, not straight germ slit, please take photos at higher magnification to illustrate this.
Jacques
Ascospores of H. fuscum are also distinctive in having a sigmoid, not straight germ slit, please take photos at higher magnification to illustrate this.
Jacques
Per Marstad,
18-12-2017 16:11
Re : Pyrenomycet on Corylus avellana.
The spores came from my pictures 1 and2.
I know H. fuscum well, but this has another shape.
Thank you both for help.
Per.
I know H. fuscum well, but this has another shape.
Thank you both for help.
Per.