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15-07-2025 13:27

literature request
Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

14-07-2025 11:20

Une hélotiale sur Sphagnum palustre
Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

16-01-2023 21:31

Troposporella fumosum => Troposporella monilipes
Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Hypoxylon cf ticinense
Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Jackrogersella minutella VS Hypoxylon cohaerens var. microsporum
Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Olla aff. millepunctata (croziers +) on Rubus idaeus
Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Rutstroemia ulmariae(?) on Saxifraga rotundifolia
Gernot Friebes

Hi,do you think this collection could be R. ulmari

25-02-2023 18:36

Nectria
Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

12-07-2025 16:45

Sur écorce de Hêtre
Thierry Blondelle Thierry Blondelle

Bonjour à tous,J'avais d'abord pensé à des stro

05-07-2025 12:38

Pyrenomycetous fungi on dead Juniperus twig
Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

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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

  • message #67608
  • message #67608
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
  • message #67630
  • message #67630
  • message #67630
  • message #67630
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