![](/images/lu.png)
23-06-2009 20:56
Le tout sur hêtre. Cela ressemble à un Cosmopora
![](/images/lu.png)
23-06-2009 19:21
Hi to all: I wish to know your opinion about this
![](/images/lu.png)
23-06-2009 13:50
![Bernard Declercq](/uploads/user_vgn/Declercq-0001.jpg)
Bonjour, Un collègue vient de trouver une péziz
![](/images/lu.png)
22-06-2009 21:09
![Yannick Mourgues](/uploads/user_vgn/Mourgues-0001.jpg)
Bonsoir à tous. Voici une récolte d'Helvella
![](/images/lu.png)
22-06-2009 21:01
![Jean Pierre Dechaume](/uploads/user_vgn/Dechaume-0001.jpg)
Les amis, Je me demande si mon champignon est nor
![](/images/lu.png)
19-06-2009 10:28
![Bernard Declercq](/uploads/user_vgn/Declercq-0001.jpg)
Bonjour, un collègue un discomycète orange-roug
Pleosporales on Quercus branch
Hans-Otto Baral,
22-04-2009 20:41
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
Any idea?
Zotto
Hans-Otto Baral,
22-04-2009 20:42
Hans-Otto Baral,
22-04-2009 20:44
NC NC,
22-04-2009 21:09
Re:Pleosporales on Quercus branch
If the ascomata are soft-textured, this may be a species of Acanthostigma.
Amy
Amy
Jacques Fournier,
22-04-2009 22:26
![Jacques Fournier](/uploads/user_vgn/Fournier-0001.jpg)
Re:Pleosporales on Quercus branch
Hi Zotto,
I agree with Amy it should be an Acanthostigma, and ascospores match well those of A. minutum (Fuckel) Sacc. I repeatedly collected this fungus growing gregarious on rotten water-soaked wood, which is different from your collection, but details on its ecology are still to gather.
Jacques
I agree with Amy it should be an Acanthostigma, and ascospores match well those of A. minutum (Fuckel) Sacc. I repeatedly collected this fungus growing gregarious on rotten water-soaked wood, which is different from your collection, but details on its ecology are still to gather.
Jacques
Hans-Otto Baral,
22-04-2009 23:39
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
Re:Pleosporales on Quercus branch
Dear Amy and Jacques
many thanks for your identification. Yes, the peridium is quite soft. The branch was in ca. 1-2 m above ground at a S-exposed edge of a forest, and all ascos on it are strongly xerotolerant. I rehydrated the branch 4 days after I collected it during dry weather, so also the Acanthostigma is well xerotolerant.
Is there any description in Reblova & Barr 2000? Jacques, do you have a documentation of the species?
Zotto
many thanks for your identification. Yes, the peridium is quite soft. The branch was in ca. 1-2 m above ground at a S-exposed edge of a forest, and all ascos on it are strongly xerotolerant. I rehydrated the branch 4 days after I collected it during dry weather, so also the Acanthostigma is well xerotolerant.
Is there any description in Reblova & Barr 2000? Jacques, do you have a documentation of the species?
Zotto
Jacques Fournier,
23-04-2009 08:51
![Jacques Fournier](/uploads/user_vgn/Fournier-0001.jpg)
Re:Pleosporales on Quercus branch
Hi Zotto,
so it makes a taxon adapted to a wide range of environmental conditions.
I attach the photos of the key and the description of A. minutum by Réblova 2000.
Cheers,
Jacques
so it makes a taxon adapted to a wide range of environmental conditions.
I attach the photos of the key and the description of A. minutum by Réblova 2000.
Cheers,
Jacques
Jacques Fournier,
23-04-2009 08:52
![Jacques Fournier](/uploads/user_vgn/Fournier-0001.jpg)
Re:Pleosporales on Quercus branch
2
Jacques Fournier,
23-04-2009 08:52
![Jacques Fournier](/uploads/user_vgn/Fournier-0001.jpg)
Re:Pleosporales on Quercus branch
3
Jacques Fournier,
23-04-2009 08:53
![Jacques Fournier](/uploads/user_vgn/Fournier-0001.jpg)
Re:Pleosporales on Quercus branch
4
Hans-Otto Baral,
23-04-2009 13:24
![Hans-Otto Baral](/uploads/user_vgn/Baral-0001.jpg)
Re:Pleosporales on Quercus branch
Hi Jacques
thanks, the description actually fits very well in most points. Septal number in the description is exactly as mine, also spore size and shape is wonderful. No details on the water relations of the substrate are given, regrettably. Interesting the Helicomyces anamorph, I will look again, hoping to find some perithecia left.
Zotto
thanks, the description actually fits very well in most points. Septal number in the description is exactly as mine, also spore size and shape is wonderful. No details on the water relations of the substrate are given, regrettably. Interesting the Helicomyces anamorph, I will look again, hoping to find some perithecia left.
Zotto