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11-03-2009 00:00

Miguel Ãngel Ribes Miguel Ángel Ribes

Buenas noches Tengo varias recolecciones de Lac

10-03-2009 18:59

Alain GARDIENNET Alain GARDIENNET

Bonsoir, Avant même d'avoir fait la micro, je v

10-03-2009 16:53

David Malloch David Malloch

Collections of Unguiculariopsis reported on this f

10-03-2009 11:24

Uwe Lindemann Uwe Lindemann

Hello forum, three days ago I found a little bro

09-03-2009 23:57

Yannick Mourgues Yannick Mourgues

Bonsoir. Pas très loin des Stylodothis puccini

09-03-2009 19:56

Jean Pierre Dechaume Jean Pierre Dechaume

J'ai trouvé sur Abies de jolies moules, Lophium m

08-03-2009 23:24

Yannick Mourgues Yannick Mourgues

La suite. Parmi mes nombreux échantillons de Nec

07-03-2009 00:20

Yannick Mourgues Yannick Mourgues

Hi. Cyathicula cyathoidea : What is the autorit

06-03-2009 20:46

Jean-Claude PERNOT

Bonjour. Je n'arrive pas a mettre un non sur ce qu

06-03-2009 15:10

Alain GARDIENNET Alain GARDIENNET

J'ai trouvé dans l'écorce d'un chêne, au voisin

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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.