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26-04-2025 07:15

Paranectria?
Dragiša Savic

Hello everyone,the lichen is Candelariella aurella

28-04-2025 12:51

Pyrenopeziza plicata on Angelica silvestris
Thomas Flammer

Substrate: Angelica sylvesrisSpore mass: 8.4 - 11.

28-04-2025 12:50

Pyrenopeziza plicata on Angelica silvestris
Thomas Flammer

Substrate: Angelica sylvesrisSpore mass: 8.4 - 11.

28-04-2025 12:50

Pyrenopeziza plicata on Angelica silvestris
Thomas Flammer

Substrate: Angelica sylvesrisSpore mass: 8.4 - 11.

14-04-2025 15:11

Need help with 6 coprophilous species
Lennert Gees

Greetings!For my master's dissertation I work on c

27-04-2025 15:54

literature search
Martin Bemmann Martin Bemmann

Can somebody provide this article from a Leningrad

26-04-2025 16:01

Michel Delpont
Jacques Fournier Jacques Fournier

J'ai le regret d'informer les membres du forum qui

26-04-2025 19:32

Arachnopeziza sp.
Francois Guay Francois Guay

I found these small Arachnopeziza sp. growing on d

25-04-2025 22:48

Hilberina from Japan
Gustaf Fredell Gustaf Fredell

Hello,I hope everything is going well. I couple mo

18-04-2025 23:16

Mollisia
Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

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Hymenoscyphus albidus?
William Slosse, 15-08-2017 15:06
William SlosseGood afternoon everyone,
I found following species on previous year's petioles of Fraxinus.
At first sight I thought this could be Rutstroemia luteovirescens but because of the short stalk I changed soon my vision.
Spores 18.75 x 4.55 um
Paraphyses filiform & septated
Asci I+ and with (?) crosiers
Thx for your confirmation,
William
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Michel Hairaud, 15-08-2017 15:37
Michel Hairaud
Re : Hymenoscyphus albidus?
Hi William,

H. albidus has become as you may know far less current now in europe than the macro replica looking H. fraxineus (T. Kowalski) Baral, Queloz & Hosoya 2014. Both have the same substrate

It is essential to make sure whether there are croziers or not as albidus has none. I cannot surely tell from your pictures whereas the spores dimensions would fit for H. albidus.
Amitiés. Michel
Martin Bemmann, 15-08-2017 15:57
Martin Bemmann
Re : Hymenoscyphus albidus?
Looks like a crozier in the lower left corner of image 7. But, indeed, better pictures of attached ascus bases are needed.
The ash dieback arrived in Belgium at least in 2007. So H. fraxineus is very likely.

Regards
Martin
William Slosse, 15-08-2017 19:40
William Slosse
Re : Hymenoscyphus albidus?
Thanks four your reaction, Michel.
I think I can indeed see some crozier-like structures (cfr photo, I'm not always sure about these croziers).
So there is a good chance this species is fraxineus I may think?
Regards,
William
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William Slosse, 15-08-2017 19:42
William Slosse
Re : Hymenoscyphus albidus?
Thanks for your reaction too, Martin.
I toke some pictures of the croziers.
See therefore my answer to Michel.
Regards,
William
Martin Bemmann, 15-08-2017 19:53
Martin Bemmann
Re : Hymenoscyphus albidus?
quite sure about croziers...

Regards
Martin
Michel Hairaud, 15-08-2017 21:48
Michel Hairaud
Re : Hymenoscyphus albidus?
No doubt any more . So H. fraxineus .
Amitiés Michel