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21-04-2026 21:00

Hymenoscyphus sp
Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

21-04-2026 22:14

Peziza
Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

22-04-2026 01:06

Neonectria ou thelonectria ?
Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

21-04-2026 13:36

Wentiomyces-like on Salix
Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

21-04-2026 13:19

Lophodermium on Typha
Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

21-04-2026 13:05

Hyphomycete on Typha
Gernot Friebes

Hi,this hyphomycete feels familiar but I was not a

20-04-2026 22:00

Trichobolus dextrinoideosetosus?
Malcolm Greaves Malcolm Greaves

These pale yellow, hairy ascos were growing on cul

19-04-2026 21:23

Hairy anamorph on plywood with beaked curved conidia
Steve Clements

Bonjour, I found this anamorphic fungus on old pl

19-04-2026 20:46

Anamorphic fungus on plywood
Steve Clements

1 mm diameter approx spherical conidiophores on pl

12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

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Hymenoscyphus ? on very wet wood
Ethan Crenson, 19-08-2025 20:58
Hi all,

Here is what I believe to be a Hymenoscyphus growing on very wet wood which was lying in mud and water in a New York park. They have a long stipe and convex hymenium. Trees nearby included Fagus, Quercus, Tsuga. My hunch is that the wood is hardwood. 


Asci are IKI+ with croziers, 101-108 x 11.4-12.7µm.


Spores are fusiform, rounded at the ends with multiple guttules, occasionally 1-septate, 14.1-21.6 x 4.1-6.3µm.


Paraphyses branch, with oil content (I think).


The stipe excipulum is textura prismatica, and there is brown pigment among the cells. The medulliary excipulum is textura angularis verging on textura globulosa.


Long ago on this forum I posted something similar (but with a shorter stipe) which Zotto suggested might be Hymenoscyphus varicosporoides. Could this be that as well?


Thanks in advance,


Ethan

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Hans-Otto Baral, 19-08-2025 22:04
Hans-Otto Baral
Re : Hymenoscyphus ? on very wet wood
Hi Ethan

yes, I think H. varicosporioides. I am unaware of such long stalks, however.

Zotto
Ethan Crenson, 19-08-2025 22:19
Re : Hymenoscyphus ? on very wet wood
Hello Zotto and many thanks!  I wonder if the long stipes could be caused by environmental factors.  I will attempt to sequence this one as well.
Hans-Otto Baral, 20-08-2025 06:57
Hans-Otto Baral
Re : Hymenoscyphus ? on very wet wood
I see similar long stipes in a Spanish collection by J. Balda (18.II.2015, folder VBs-). Yours I considered VBs+, but the distinction between the two folders is a bit vague.
Ethan Crenson, 20-08-2025 15:39
Re : Hymenoscyphus ? on very wet wood
In Johnston PR, Baschien C (2020). Tricladiaceae fam. nov. (Helotiales, Leotiomycetes). Fungal Systematics and Evolution 6: 233–242. there is this: 

"The oldest name for this fungus is Hymenoscyphus varicosporoides but it is clearly not a Hymenoscyphus in the modern sense of this genus." ... and it is placed in the genus Tricladium. Why is it clearly not a Hymenoscyphus in the modern sense? 

Thank you also for the clarification about the VBs (rather than oil) in the paraphyses.
Hans-Otto Baral, 20-08-2025 17:27
Hans-Otto Baral
Re : Hymenoscyphus ? on very wet wood
This is a matter of taste. What is for Peter a family is for me a subgroup of Hymenoscyphus. Peter's arguments are mostly genetical. I had accepted Phaeohelotium as a genus but now include it in Hymenscyphus, as I do with Cudoniella. Cudoniella could be used for C. varicosporioides, but the consequences would be very complicated and unsatisfying.