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28-03-2026 07:55

Marc Detollenaere Marc Detollenaere

Hello everybody,Yesterday I found a number of whit

26-03-2026 15:31

Ã…ke Widgren Ã…ke Widgren

Hello,I found this one in October last year, on r

27-03-2026 15:23

Gernot Friebes

Hi,this Trichopezizella deviates from typical T. b

25-03-2026 10:35

Hulda Caroline Holte

Hello,I collected this species growing on a dead b

27-03-2026 15:08

Gernot Friebes

Hi,I'm looking for help with this coelomycete on C

27-03-2026 10:47

Ã…ge Oterhals

I have tentatively identified this Stictis to S. f

24-03-2026 21:37

Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

26-03-2026 12:50

David Chapados David Chapados

Hi,I'm having a hard time figuring which Pseudombr

26-03-2026 11:17

Vasileios Kaounas Vasileios Kaounas

Found 11-03-26, in leaf of Ulmus sp. Diameter 2-4

25-03-2026 22:23

Marc Detollenaere Marc Detollenaere

Dear Forum,On a debarked stem of Tilia, we found s

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Hymenoscyphus vernus?
Juuso Äikäs, 22-05-2020 17:45
Yesterday I was searching for fungi from the bottom of a small forest stream. I stumbled upon these, growing from thin hardwood branches.

The asci seemed to be without croziers. I got almost no reaction with Melzer's but with Lugol's there was a fairly clear blue reaction with the apical pore. 

Spore measurements:  (7.6) 8.3 - 12.2 (13.3) × (3.4) 3.5 - 4.3 (4.4) µm
Q = (2) 2.3 - 3.1 (3.5) ; N = 16
Me = 10.3 × 3.8 µm ; Qe = 2.7

So does this fit H. vernus or might this be something else? I've found Cudoniella clavus before in the same stream last summer but I think this is something different. That finding had croziers and the stems were brown towards the base.
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Hans-Otto Baral, 22-05-2020 20:37
Hans-Otto Baral
Re : Hymenoscyphus vernus?
Yes, this is a good fit. A dark base is typical for H. vernus, not sure if it occurs also in C. clavus. Genetically the two species are surely congeneric, but the absence of croziers and the narrower, more cylindrical spores are typical of H. vernus.
Juuso Äikäs, 22-05-2020 20:50
Re : Hymenoscyphus vernus?
Ok, many thanks! I looked at a couple ascocarps with 20X magnification and the base of the stem was blackish. The C. clavus that I've found had more a medium brown than a blackish base.
Hans-Otto Baral, 22-05-2020 21:16
Hans-Otto Baral
Re : Hymenoscyphus vernus?
This is exactly the current case.