26-05-2025 18:09
Henk RemijnGood day,In a burned forest near Hulst on the bord
22-06-2025 13:52
DirkW
Dear friends,anyone out there with this paper?:DOU
20-06-2025 08:33
Josep Torres
Hello.Small, blackish, mucronated surface grains s
19-06-2025 22:19
Björn NordénBig thanks in advance.
11-06-2025 16:26
Jason Karakehian
Hi everyone, I am looking for the following protol
18-06-2025 19:24
Bernard Declercq
Good evening,On Oenanthe aquatica we collected a
18-06-2025 16:24
Andgelo Mombert
Bonjour,Un minuscule stade imparfait, qui pousse s
13-06-2025 16:34
Andgelo Mombert
Bonjour,Un petit discomycète qui me résiste. Il
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 ?
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