Accès membres

Mot de passe perdu? S'inscrire

17-03-2026 19:41

Pyréno sur branche morte de chêne
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

12-03-2026 19:44

Ostropoloid fungus on Hibiscus
Enrique Rubio Enrique Rubio

Hi to everybody.Can you give me any suggestions ab

17-03-2026 10:09

Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

17-03-2026 10:40

Geopora sumneriana
Martine Vandeplanque Martine Vandeplanque

Bonjour à tous.Chaque année en mars ou avril, il

05-03-2026 10:07

White apothecia on pine cone
Hulda Caroline Holte

Hello, I found and collected this species growing

12-03-2026 15:45

Dematioscypha cf. olivacea
Åge Oterhals

Dear forum,I found this small discomycete on a ver

12-03-2026 16:17

Mollisia atlantica
Sylvie Le Goff

Bonjour à tousRécolté dans le 22 en France (ré

11-03-2026 17:36

Help for Genus and Species ID
Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

14-03-2026 13:51

Phylloscypha sp
Thierry Blondelle Thierry Blondelle

Hi everybody Under Quercus ilex, i hesitate to na

08-03-2026 14:05

Helvella lacunosa
Thierry Blondelle Thierry Blondelle

Bonjour à tous,Sur 3 récoltes supposées de H. l

« < 1 2 3 4 5 > »
Valsa?
Björn Wergen, 23-07-2013 22:15
Björn WergenHi 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
  • message #24508
  • message #24508
  • message #24508
  • message #24508
  • message #24508
Alain GARDIENNET, 24-07-2013 08:26
Alain GARDIENNET
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
Björn Wergen
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
Alain GARDIENNET, 24-07-2013 10:11
Alain GARDIENNET
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