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25-08-2025 17:37

Petit asco indéterminé
François Freléchoux François Freléchoux

Bonjour,Nous avons trouvé samedi dernier à l'ét

24-08-2025 21:30

Orbilia dryadum ?
Ethan Crenson

Found yesterday in a New Jersey park.  An Orbilia

24-08-2025 21:59

Podospora
Edmond POINTE Edmond POINTE

Bonsoir amis mycologues,Trouvé sur crottin de che

21-08-2025 18:09

Semble Thecotheus
Edmond POINTE Edmond POINTE

Bonjour Amis mycologues.Trouvé sur crottin de che

22-08-2025 18:10

Protocrea ?
Ethan Crenson

Hello everyone,  I found what I think might be P

20-08-2025 19:04

Adelphella babingtonii - lacking much brown pigment
Ethan Crenson

Hello, This asco was found on the same wood as my

22-08-2025 08:41

Literature request
Masanori Kutsuna

Hello.Can anyone help me to get this article?Liu H

21-08-2025 02:18

Helicoma muelleri?
Stefan Jakobsson

On a necrotic section of a living Tilia cordata I

18-08-2025 23:15

S.vitreola?
Zoe Vélez Zoe Vélez

Hola foro, gracias por aceptar la creación de mi

19-08-2025 20:58

Hymenoscyphus ? on very wet wood
Ethan Crenson

Hi all, Here is what I believe to be a Hymenoscyp

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Hymenoscyphus on Betula leaves
Juuso Äikäs, 29-10-2020 17:28
There were plenty of these growing on decaying Betula sp. leaves. 

Spores fusiform, with tiny dark drops, measuring 13.4-16 x 6.5-7.1 micrometres. Praphyses cylindrical, top parts full of rapidly moving VBs. Margin also with VBs. Croziers present, IKI+(b). 

Seems like a Hymenoscyphus once again, but further I can't tell.
  • message #65635
  • message #65635
Hans-Otto Baral, 29-10-2020 18:05
Hans-Otto Baral
Re : Hymenoscyphus on Betula leaves
I am unable to say. The apos look rather small, are they? Any stipe?

A section of the excipulum could give some further hint. Cudoniella probably, but spores quite large, larger than in H. imberbis which is a Cudoniella too.
Juuso Äikäs, 29-10-2020 19:11
Re : Hymenoscyphus on Betula leaves
The apos are quite small -- the largest ones maybe a millimeter in diameter or so. And they do have a stipe. Making a section would be quite difficult, but maybe I'll try it a bit later.