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15-10-2019 21:47

Stephen Mifsud Stephen Mifsud

Hi, my eye fell on a dead stalk of a herbaceous pl

01-01-2015 17:06

Alessio Pierotti Alessio Pierotti

Happy new year to all friends of the forumSomeone

15-10-2019 05:23

Yulia Lytvynenko

Dear friends.Looking for a copy of the following w

14-10-2019 16:02

Yulia Lytvynenko

Dear friends.Looking for a copy of the following w

14-10-2019 20:00

Michael Haldeman

This collection is from bark at the base of a dead

12-10-2019 22:16

Michael Haldeman

I found this fungus on the thallus of Ochrolechia

12-10-2019 22:06

Mirek Gryc

Hello all.A few days ago I found Peziza which I in

13-10-2019 14:31

Thorben Hülsewig

Hi there, I have here a Calycina sp. which I cann

13-10-2019 18:13

Riet van Oosten Riet van Oosten

Hello, On the culm of Phragmites australis (on th

13-10-2019 18:42

Ethan Crenson

Does anyone have: Liew, E.C.Y.; Aptroot, A.; Hyde

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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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