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Add-on topic http://www.ascofrance.com/forum/7059
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White Hymenoscyphus on bark
Nicolas VAN VOOREN,
16-06-2019 11:54
Hello.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.
Hans-Otto Baral,
16-06-2019 12:21
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
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
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.
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
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
Re : White Hymenoscyphus on bark
Here is a picture of the bark which is layered.
Hans-Otto Baral,
16-06-2019 18:33
Re : White Hymenoscyphus on bark
Ah yes, such bark I know, but not from where :-(
Conifer probably not. And Fagus indeed similar, see here.
Conifer probably not. And Fagus indeed similar, see here.
