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Mot de passe perdu? S'inscrire

16-09-2025 12:53

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a digital copy of the seco

14-09-2025 22:16

Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

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Hypoxylon macrocarpum on Corylus?
Marc Detollenaere, 24-10-2018 19:57
Marc Detollenaere

On Carpinus we found some multi-peritheciate stromata with a blue metallic shine.Stromata were mostly immersed.With KOH 5% a greyish pigment was extracted and we could also observe a slightly dehiscent perispore.Spores measured 10-11x4µ.


We thought it matched quite well with the description of Hypoxylon macrocarpum from Pouzar(1978).


Could you agree?

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Yannick Mourgues, 24-10-2018 21:55
Yannick Mourgues
Re : Hypoxylon macrocarpum on Corylus?
Hi.

Yes, I think you're right. See Jacques Fourier's description : http://pyrenomycetes.free.fr/hypoxylon/html/Hypoxylon_macrocarpum.htm

Yannick
Eduard Osieck, 25-10-2018 22:27
Re : Hypoxylon macrocarpum on Corylus?
Hi Marc,
The perithecia should be more or less cylindrical (see next issue of Coolia).
Eduard
Marc Detollenaere, 26-10-2018 00:01
Marc Detollenaere
Re : Hypoxylon macrocarpum on Corylus?

Hello Eduard,


If it not macrocarpum, what would you suggest?

Marc Detollenaere, 26-10-2018 20:31
Marc Detollenaere
Re : Hypoxylon macrocarpum on Corylus?
Merci Yannick
Thomas Læssøe, 29-10-2018 11:58
Re : Hypoxylon macrocarpum on Corylus?
I would suggest a species of Nemania. Perithecial contours are visible on the stromatal surface and the ostioles would appear to be papillate and the ascus plug is too long to fit Hypoxylon
cheers
Thomas
Marc Detollenaere, 30-10-2018 07:03
Marc Detollenaere
Re : Hypoxylon macrocarpum on Corylus?
Hello Thomas,

I think you are right. I have been misleaded by the apical apparatus.
That also explains the minimal reaction on KOH.
I discussed the matter with Bernard Declercq who thinks is Nemania serpens var. colliculosa.

Marc