Accès membres

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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Hymenoscyphus
William de Jong, 21-11-2021 10:36
Hi everyone,

I would like some help in identifying this Hymenoscyphus.

Found it (yesterday) on a half-dead flowering stem of Symphyotrichum (The Netherlands). Apothecia max. 1.5 mm diameter, not reddening. I found croziers I think. Spores with quite some oil content: 20,8-22,6 x 4,7-5,1; no cilia observed.
For other details, see pictures.

Does anyone recognize this Hymenoscyphus?
Thanks in advance.

Best regards,
William

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Hans-Otto Baral, 21-11-2021 11:32
Hans-Otto Baral
Re : Hymenoscyphus
Looks like croziers indeed. What is not clear is the paraphysis content (in vivo). Strongly refractive multiguttulate?

Symphyotrichum is a genus with England-Aster etc. Is the stem herbaceous or woody?

H. virgultorum has similar spores but lacks croziers and grows on woody substrates.

H. fucatus has larger spores with larger LBs.

So I have no idea.
William de Jong, 21-11-2021 13:05
Re : Hymenoscyphus
Thank you very much for your answer Zotto!

It's indeed something like England-Aster - Aster novae-angliae, or a close relative. The lower part of the stem where the Hymenoscypes was growing is definitely more woody than herbaceous. The content of the paraphysis (in vivo) is not strongly refractive multiguttulate.
(In the attached picture in my first post I accidently posted a close-up of one of the paraphysis in Lugol, my apologies.)

Okay, Hymenoscypus sp. it remains. Thanks again for your help.

Best regards, William
Hans-Otto Baral, 21-11-2021 15:27
Hans-Otto Baral
Re : Hymenoscyphus
The absence or inconspicousness of VBs in the paraphyses would be a rare and remarkable feature and worth to photograph, especially in order to see if they were alive or not. Best in oil immersion.