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24-02-2026 00:21

Benoît Segerer

Hello,I'm new to this forum, I hope I won't be irr

24-02-2026 11:01

Gernot Friebes

Hi,found on a branch of Tilia, with conidia measur

23-02-2026 11:22

Thomas Læssøe

https://svampe.databasen.org/observations/10584971

29-11-2024 21:47

Yanick BOULANGER

BonjourJ'avais un deuxième échantillon moins mat

07-02-2023 22:28

Ethan Crenson

Hello friends, On Sunday, in the southern part of

19-02-2026 17:49

Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

09-02-2026 22:01

ruiz Jose

Hola, me paso esta colección en madera de pino, t

19-02-2026 13:50

Margot en Geert Vullings

We found this collection on deciduous wood on 7-2-

19-02-2026 12:01

Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

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cf. Chalara fraxinea
Pavol Palo, 23-02-2021 20:18
Hello friends,
may I ask you for help ? I would need some idea or opinion.

Found on dead wood Fraxinus excelsior. I don't know how the amorphous stage of Hymenoscyphus fraxineus (Chalara fraxinea) actually looks macroscopic. The fruiting body is fragile, and contains structures that are pictured. Found both in January but also in September


Regards


Pavol

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Viktorie Halasu, 23-02-2021 20:30
Viktorie Halasu
Re : cf. Chalara fraxinea
Hi Palo,

have you tried (macro) reaction of the stroma(?) in KOH? To me it looks a bit like a germinating Hypoxylon. 

Tori
Pavol Palo, 24-02-2021 18:59
Re : cf. Chalara fraxinea
Hi Tori,

Slightly yellow color reaction of "stroma" with 10% KOH. But I've also never not seen spore chaining with Hypoxylon sp. It looks more like chlamydiospores that produce conidia

regards
Pavol
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  • message #67630
  • message #67630
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Thorben Hülsewig, 24-02-2021 22:54
Re : cf. Chalara fraxinea
Hi Palo,

compare with Xylohypha nigrescens.

best regards,
Thorben
Pavol Palo, 24-02-2021 23:55
Re : cf. Chalara fraxinea
Hi Thorben,
Thank you, it looks like that's it
Sincerely
Pavol