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20-10-2025 09:36

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for the following article:Bene

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

21-10-2025 23:13

F. JAVIER BALDA JAUREGUI

Hello to everyone.Did you think it could, be a pyx

22-10-2025 06:43

Ethan Crenson

Hi all, I'm having some difficulty with this Orbi

22-10-2025 14:45

Lukas Verboom

Dear all,I collected this in the Netherlands, on t

22-10-2025 11:13

Jean-Luc Ranger

Bonjour,  Petites boules plus ou moins sphériqu

21-10-2025 21:25

Philippe PELLICIER

Bonjour,J'ai récolté en septembre sur une litiè

17-10-2025 18:45

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Oct. 2025.

21-10-2025 21:34

Margot en Geert Vullings

This cup fungus was found on the ground in a damp

21-10-2025 04:52

Francois Guay Francois Guay

I found what might be Chlorociboria aeruginella on

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White Hymenoscyphus on bark
Nicolas VAN VOOREN, 16-06-2019 11:54
Nicolas VAN VOORENHello.
Here is a Hymenoscyphus species growing on bark (probably Fagus) in a wet place.
Apothecia Ø 1-1.8 mm, sessile or short-stalked, pure wihite.
Ectal excipulum of t. prismatica.
Asci without crozier, pars sporifera 26-32 µm, IKI+ (bb)
Paraphyses without VB
Ascospores 11-14 (18) × 3-4 µm, sometimes with a septum (only when ejected), OCI 1-2.

H. phyllogenus seems close, but the substrate is different.
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Hans-Otto Baral, 16-06-2019 12:21
Hans-Otto Baral
Re : White Hymenoscyphus on bark
Hi Nico

this reminds me strongly of my Hymenosc./Phaeohelotium "Cagne" on coniferous wood. See my folder "monticola".

The VBs in the paraphyses are multiguttulate and vary between faintly and medim refractive.

So far 3x on coniferous wood in Vosges.

Did you look for the wood anatomy? In cross section coniferous wood is easily determined, and Fagus also.
Zotto
Nicolas VAN VOOREN, 16-06-2019 12:45
Nicolas VAN VOOREN
Re : White Hymenoscyphus on bark
Not easy to study the anatomy of rotten bark... As there were some Picea abies in the same place, this is an option.
I agree that this H. "Cagne" could fit, although the VB in the paraphyses are not so distinct in my collection.
Hans-Otto Baral, 16-06-2019 16:39
Hans-Otto Baral
Re : White Hymenoscyphus on bark
Ah yes, you wrote bark. Bark is not easy to identify. Is there no adherent wood? Fagus bark has a very characteristic inner side.
Nicolas VAN VOOREN, 16-06-2019 17:50
Nicolas VAN VOOREN
Re : White Hymenoscyphus on bark
Here is a picture of the bark which is layered.
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Hans-Otto Baral, 16-06-2019 18:33
Hans-Otto Baral
Re : White Hymenoscyphus on bark
Ah yes, such bark I know, but not from where :-(

Conifer probably not. And Fagus indeed similar, see here.
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