20-12-2025 23:08
Patrice TANCHAUDBonsoir, récolte sur sol sablonneux dans l'arriÃ
21-12-2025 09:32
Josep Torres
Hello.A tiny ascomycete found embedded in wood in
20-12-2025 15:47
Mirek GrycHi.These grew on pine wood that was heavily covere
18-12-2025 21:17
Pol DebaenstThe identification took me to Byssonectria deformi
15-12-2025 07:09
Danny Newman
indet. Rutstroemiaceae sp. on unk. fallen leavesMc
19-12-2025 10:10
Patrice TANCHAUDBonjour, récolte réalisée en milieu dunaire, a
18-12-2025 17:23
Bruno Coué
Bonjour,je serais heureux d'avoir votre avis sur c
Valsa?
Björn Wergen,
23-07-2013 22:15
Hi there,I have found this small valsoid pyrenomycete growing on dead attached Carpinus twigs. For me, it is very strange for being a member of Valsa, as there are no visible ostioles embedded in a grey stromatic mass. Perithecia are arranged in circles.
Microscopically it has allantoid, hyaline, one celled spores of 8-10x1,8-2,4µm. Asci with a distinct apical apparature staining faintly red in Congo. The fruitbody reminds me on some Wuestneia findings...
Any ideas?
All the best,
björn
Alain GARDIENNET,
24-07-2013 08:26
Re : Valsa?
Hi Björn
 Very strange. Are you sure of Carpinus ?
Any Cystospora on the same twig ?Â
Alain
Björn Wergen,
24-07-2013 09:46
Re : Valsa?
Hi Alain,
I am not that sure about Carpinus, it can also be Fagus. But I did not see any Cytospora on any twig I had collected.
In all Valsa collections I hadn't ever had such small spores (<10µm).
regards,
björn
I am not that sure about Carpinus, it can also be Fagus. But I did not see any Cytospora on any twig I had collected.
In all Valsa collections I hadn't ever had such small spores (<10µm).
regards,
björn
Alain GARDIENNET,
24-07-2013 10:11
Re : Valsa?
Valsa ceratosperma is perhaps possible : ascospores 6.5-10 x 2-2,5 µm. It has been seen on Betula, Quercus, Malus...
But beeks are longer .
Alain
But beeks are longer .
Alain