Accès membres

Mot de passe perdu? S'inscrire

14-03-2026 13:51

Phylloscypha sp
Thierry Blondelle Thierry Blondelle

Hi everybody Under Quercus ilex, i hesitate to na

12-03-2026 19:44

Ostropoloid fungus on Hibiscus
Enrique Rubio Enrique Rubio

Hi to everybody.Can you give me any suggestions ab

11-03-2026 17:36

Help for Genus and Species ID
Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

12-03-2026 15:45

Dematioscypha cf. olivacea
Åge Oterhals

Dear forum,I found this small discomycete on a ver

05-03-2026 10:07

White apothecia on pine cone
Hulda Caroline Holte

Hello, I found and collected this species growing

08-03-2026 14:05

Helvella lacunosa
Thierry Blondelle Thierry Blondelle

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

12-03-2026 16:17

Mollisia atlantica
Sylvie Le Goff

Bonjour à tousRécolté dans le 22 en France (ré

12-03-2026 14:37

Octospora
David Wasilewski

These small ascomycota (1-3 mm) ere observed growi

11-03-2026 16:48

Saccobolus minimoides ?
Bruno Coué Bruno Coué

Bonjour, je serais heureux d'avoir votre avis sur

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

« < 1 2 3 4 5 > »
White discomycete on Alnus wood
Stefan Jakobsson, 21-01-2023 00:10
On a dead branch attached to a standing Alnus (?)glutinosa there were some 0.3-0.5 mm wide white apos on decorticared wood. The margin and flanks are covered with smooth more or less uncinate hairs. The spores are 5.7-8.5 × 2.1-2.7 µm and the asci 41-50 × 5.8-7.0 µm. Asci seem to have croziers and the iodine reaction is negtive also after KOH pretreatment. The paraphyses have a long VB in the apical cell.

I tried to match this with e.g. Calycina hyalinula but the hairs don't fit in. The temperature in southern Finland had been mostly above freezing point for a week when this was collected yesterday. Are there better suggestions?

  • message #74960
  • message #74960
  • message #74960
  • message #74960
  • message #74960
Lothar Krieglsteiner, 21-01-2023 09:05
Lothar Krieglsteiner
Re : White discomycete on Alnus wood
perhaps have a look in the genus Hmatocanthoscypha?
Best regards, Lothar
Stefan Jakobsson, 21-01-2023 10:39
Re : White discomycete on Alnus wood
The hairs, of course, bring Hamatocanthoscypha to mind. But VBs in Hamatocanthoscypha? I found nothing suitable on hardwood.
Lothar Krieglsteiner, 21-01-2023 10:54
Lothar Krieglsteiner
Re : White discomycete on Alnus wood
you are right, I overlooked the vacuolar bodies. Then Calycellina perhaps ?
Hans-Otto Baral, 21-01-2023 17:50
Hans-Otto Baral
Re : White discomycete on Alnus wood
I was also thinking about the VBs but I believe Hamatocanthoscypha is a good choice. What about H. straminella? Look in my folder, it is IKI-, but I thought it should be yellow. For sulphureocintina this is so and also straminella was described as "straminea vel subaurea".
Stefan Jakobsson, 21-01-2023 18:29
Re : White discomycete on Alnus wood
At least last time I collected H. straminella on Alnus three years ago it was very clearly yellow. Then it was growing under a piece of wood against the ground in darkness, so the lack of light does not explain the difference.
  • message #74976
Hans-Otto Baral, 21-01-2023 20:45
Hans-Otto Baral
Re : White discomycete on Alnus wood
Ah you know it, and it was inamyloid, yes? The hairs contain here distinctly rfefractive VBs, not yellow, but I suppose the yellow VBs in the paraphyses were also refractive.

Surely this is something very similar.
Stefan Jakobsson, 21-01-2023 21:44
Re : White discomycete on Alnus wood
It was inamyloid but probably I did not test with pretreatment. Unfortunately I did not save the photos, but the notes say that hairs and paraphyses were more clearly yellow under the microscope than what the photos show.
Hans-Otto Baral, 21-01-2023 23:00
Hans-Otto Baral
Re : White discomycete on Alnus wood
If you use Lugol you must not pretreat with KOH.
Stefan Jakobsson, 22-01-2023 00:27
Re : White discomycete on Alnus wood
Always lugol!