04-11-2025 12:43
Edvin Johannesen
Hi! One more found on old Populus tremula log in O
04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
28-10-2025 15:37
Carl FarmerI'd be grateful for any suggestions for this strik
03-11-2025 16:30
Hans-Otto Baral
Hello I want to ask you if you have found this ye
28-10-2025 19:33
Nicolas Suberbielle
Bonjour à tous,Je voudrais votre avis sur cette r
31-10-2025 09:19
Lothar Krieglsteiner
Can somebody provide me with a file of:Rogerson CT
Hymenoscyphus albidus?
William Slosse,
15-08-2017 15:06
Good 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
Michel Hairaud,
15-08-2017 15:37
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
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
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
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
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
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
William Slosse,
15-08-2017 19:42
Re : Hymenoscyphus albidus?
Thanks for your reaction too, Martin.
I toke some pictures of the croziers.
See therefore my answer to Michel.
Regards,
William
I toke some pictures of the croziers.
See therefore my answer to Michel.
Regards,
William
Martin Bemmann,
15-08-2017 19:53
Re : Hymenoscyphus albidus?
quite sure about croziers...
Regards
Martin
Regards
Martin
Michel Hairaud,
15-08-2017 21:48
Re : Hymenoscyphus albidus?
No doubt any more . So H. fraxineus .
Amitiés Michel
Amitiés Michel