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18-04-2025 23:16

Mollisia
Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

19-04-2025 20:48

Pyreno on Fagus sylvatica.
Per Marstad Per Marstad

Dear Ascofrance. I have not posted pyrenos for a l

19-04-2025 18:58

Korf & Lizon 2000
Michel Hairaud Michel Hairaud

Bonjour,Je recherche l'article suivant :  ... K

19-04-2025 08:51

Unknown pyrenomycetous fungus growing on cowberry
Henri Koskinen

Could you help me in the right direction with this

18-04-2025 21:54

Unknown aquatic pyrenomycete
Hartmut Schubert Hartmut Schubert

Hi Forum,I found this aquatic pyrenomycete a few d

16-04-2025 08:53

Anamorph on a leaf.
Josep Torres Josep Torres

Hello.An anamorph photographed under holm oaks thi

18-04-2025 17:13

Helotiales on herbaceous stems
Francois Guay Francois Guay

I found this interesting reddish Helotiales growin

18-04-2025 11:34

Gelatinosa en Acacia
Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia (España), r

17-04-2025 23:03

Scutellinia
Yanick BOULANGER

BonsoirVoici un Scutellinia qui nous pose un probl

17-04-2025 18:31

Peziza ammophila / pseudoammophila ?
Giovanni ANTOLA Giovanni ANTOLA

Bonjour, J'aurais besoin d'aide avec ce pezizale

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Helotiales on Betula leaf
Juuso Äikäs, 03-11-2024 07:27
This tiny (0.2 mm wide) brown cup fungus was growing on a decaying Betula leaf.

Asci 8-spored, IKI+(b). The asci have prominent basal protuberances, but seem to lack proper croziers.


There were some cylindrical cells without contents that might be paraphyses or marginal cells.


The excipulum seems to be of textura porrecta.


Spores:


9.6 - 11.89 (11.9) × (2.5) 2.53 - 3.28 (3.3) µm
Q = 3 - 4.1 ; N = 5
Me = 10.2 × 2.8 µm ; Qe = 3.6


 

Hans-Otto Baral, 03-11-2024 07:50
Hans-Otto Baral
Re : Helotiales on Betula leaf
I imagined Hyaloscypha fuscostipitata but that has definitely smaller spores and particularly strongly tapering hairs, also a dark base. And you are right: the ascus protuberance does not fuse. What seems to be paraphyses is not clearly alive, are you sure that the fungus has no VBs?
Juuso Äikäs, 03-11-2024 08:38
Re : Helotiales on Betula leaf
Thanks, I'm not entirely sure about VBs -- maybe the fruitbody wasn't in the best condition. Wish I had some extra material. There was some brown pigment on the outside, maybe from crushed cells?
  • message #80578
Hans-Otto Baral, 03-11-2024 08:56
Hans-Otto Baral
Re : Helotiales on Betula leaf
There are globose bodies with that colour which could point to multiguttulate VBs, but not sure.