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25-04-2025 17:24

Stefan Blaser

Hi everybody, This collection was collected by JÃ

09-02-2026 22:01

ruiz Jose

Hola, me paso esta colección en madera de pino, t

10-02-2026 17:42

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me donner

10-02-2026 18:54

Erik Van Dijk

Does anyone has an idea what fungus species this m

09-02-2026 20:10

Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

09-02-2026 11:42

Ã…ge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

02-02-2026 21:46

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

25-01-2026 23:23

Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

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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