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17-07-2019 15:12

Thomas Læssøe

Has anyone Remler or the part that contains Belono

14-07-2019 10:38

Markus Wilhelm

Bonjour, je visite récente le forêt tropicale d

14-07-2019 19:14

Rubén Martínez-Gil Rubén Martínez-Gil

Boudier in 1917 describes Lamprospora lutziana and

16-07-2019 16:53

Elisabeth Stöckli

Bonjour, Sur feuilles mortes de Sempervivum à 2'

12-07-2019 14:29

Alessandro Fellin

Habitat: in torbiera a sfagni su steli guasti e im

16-07-2019 18:21

Michel RIMBAUD

Bonjour,Quelqu'un peut-il me fournir une clé actu

16-07-2019 12:37

Blasco Rafael Blasco Rafael

Hola.Tienen Ustedes alguna idea de que genero mira

16-07-2019 16:56

Ethan Crenson

Hello all, Does anyone happen to have... Barr, M

16-07-2019 08:11

Enrique Rubio Enrique Rubio

Hi Do you have any idea about this Lophodermium g

14-07-2019 16:59

Tanja Böhning Tanja Böhning

Bonjour,   J´ai une Scutellinia avec des poils

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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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  • message #58136
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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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