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17-11-2009 22:22

Peziza avec latex
Pablo Chacón Pablo Chacón

Bonne nuit, Voir si vous m'avez élaguée appor

07-12-2015 14:17

Una Peziza a latice giallo-verdastro con croziers
Zugna Marino Zugna Marino

Buon giorno a tutti, ad un primo momento, non ess

25-11-2012 20:32

Otidea o Peziza?
Bometon Javier Bometon Javier

Ascomas cupoliformes abiertos lateralmente, himeni

25-01-2026 16:08

Geoglossum
Malcolm Greaves Malcolm Greaves

This Geoglossum had spores mostly 70-80 (87) with

27-01-2026 11:43

DNA match
Malcolm Greaves Malcolm Greaves

Is anyone with experience of DNA testing able to t

26-01-2026 11:49

Anamorph on Cytisus
Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Delitschia/Lojkania? on wood
Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Anamorph on an olive tree
Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

23-01-2026 21:50

Looking for a paper please
Cameron DK

I am looking for this please publication. is anyon

10-01-2026 20:00

Lichenicolous fungus on Protoparmeliopsis muralis
Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

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edit: Hymenoscyphus caudatus H+ in North America
Khomenko Igor, 04-08-2021 18:35
Khomenko IgorHi,

Is this Hymenoscyphus fraxineus, or do we have something else in Eastern North America? I find mostly H. albidus on rotten leaves here around Ottawa, On, Canada.

This was on heavily rotten leaves on the wet ground. Apothecia small, under 2mm in diameter white and later pale yellowish, stipitate.
Asci 8-spored, IKI+bb, croziers(+), 97x11um, 107x10um, 106x11um.
Ascospores scutuloid, OCI=4,
(16) 16.3 - 20.5 (21.2) × (4.3) 4.4 - 4.8 (4.9) µm
Q = (3.4) 3.5 - 4.5 (4.7) ; N = 23
Me = 18.1 × 4.6 µm ; Qe = 3.9
Paraphyses are cylindrical with multiguttulate VBs, 3.3-3.8um width.

Thank you for your help,
Igor

P.S. more data here: https://inaturalist.org/observations/89861349
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Martin Bemmann, 04-08-2021 18:48
Martin Bemmann
Re : Hymenoscyphus fraxineus? in North America
Hi Igor,

with croziers + it can be only H. fraxineus in Europe. Do you find them on leaves or their rachises? And on Fraxinus?

Best Martin
Khomenko Igor, 04-08-2021 19:12
Khomenko Igor
Re : Hymenoscyphus fraxineus? in North America
I think it is on leaves and I'm not sure about the host. It doesn't look like Fraxinus to me, but Fraxinus is abundant as new growth in that area. We lost almost all mature trees because of the emerald ash borer.
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Martin Bemmann, 04-08-2021 20:04
Martin Bemmann
Re : Hymenoscyphus fraxineus? in North America
This doesn't look like leaves of Fraxinus.  Fraxinus has pinnate leaves.
Juuso Äikäs, 04-08-2021 20:22
Re : Hymenoscyphus fraxineus? in North America
Would H. caudatus s.l. be possible? The normal variation doesn't have croziers, but there are other variations (or species?) that do.
Hans-Otto Baral, 04-08-2021 20:39
Hans-Otto Baral
Re : Hymenoscyphus fraxineus? in North America
I put it in my folder caudatus H+ central Europe but wonder why the Vbs are only weakly refractive, similar as oftwn the case in typical H. caudatus.

H. albidus occurs in the US? Not sure if I ever heard of this.
Khomenko Igor, 04-08-2021 22:02
Khomenko Igor
Re : Hymenoscyphus fraxineus? in North America
Thank you very much Martin, Juuso, and especially Zotto. Every time I think I know something you prove me wrong.

I will post about "H. albidus" in a new topic.

Regards,
Igor