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18-12-2017 10:41

Pyrenomycet on Corylus avellana.
Per Marstad Per Marstad

Hello.I would like a name on this.Spores 15x6 my.A

18-12-2017 12:24

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17-12-2017 10:54

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Per Marstad Per Marstad

I would like a name on this. 2 mm in diameter, dar

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14-12-2017 11:51

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Per Marstad Per Marstad

3-8 mm in diameter, black, sp. 14-15 x 7-8 my, asc

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Pyrenomycet on Corylus avellana.
Per Marstad, 18-12-2017 10:41
Per MarstadHello.
I would like a name on this.
Spores 15x6 my.
Asci 150x7
Greetings, Per
  • message #51652
  • message #51652
  • message #51652
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
Jacques Fournier
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
Per Marstad, 18-12-2017 16:11
Per Marstad
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.