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03-02-2026 20:44

Zetti Mario

When I first saw this white mould on an Agaricus s

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Lothar Krieglsteiner Lothar Krieglsteiner

.. 20.7.25, in subarctic habital. The liverwort i

02-02-2026 21:46

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

02-02-2026 14:55

Andgelo Mombert Andgelo Mombert

Bonjour,Sur thalle de Lobaria pulmonaria.Conidiome

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31-01-2026 10:22

Michel Hairaud Michel Hairaud

Bonjour, Cette hypocreale parasite en nombre les

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Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pour cette récolte de 2

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Nicolas Suberbielle Nicolas Suberbielle

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éric ROMERO éric ROMERO

Bonjour tous, Récolté dans les Vosges le 22/10/

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Marc Detollenaere Marc Detollenaere

Dear Forum,On decorticated wood of Castanea,I foun

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Small white dics on birch
Margot en Geert Vullings, 10-01-2024 17:28
On decayed birch on the ground we saw these very small white discs, no stem and they appear to have no hairs.

Spores measured in water:
Me = 11.3 × 3.8 µm ; Qe = 3


Ascus measured in water:
Me = 61.9 × 10 µm ; Qe = 6.2
IKI+


Paraphyses septated, cylindrical, slightly thickened towards the apex, without VBs.


We were thinking towards Hyaloscypha and were suggested Hyaloscypha minuta (Parorbiliopsis) , a species without hairs, but with reaction IKI neg.
Does anyone have an idea about this?


Thanks in advance,
Margot&Geert

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Hans-Otto Baral, 10-01-2024 18:19
Hans-Otto Baral
Re : Small white dics on birch
I would also suggest Hyaloscypha. Croziers seem to be absent. In my head I have no idea.
Margot en Geert Vullings, 10-01-2024 18:49
Re : Small white dics on birch
Thank you Hans-Otto, do you think it could be H. minuta?
We think we saw no croziers.
Hans-Otto Baral, 10-01-2024 21:41
Hans-Otto Baral
Re : Small white dics on birch
H. minuta is always inamyloid, and I don't think that such variation occurs within this species.
Michel Hairaud, 11-01-2024 09:54
Michel Hairaud
Re : Small white dics on birch
Bonjour Margot et Zotto, 
I would also have thought of H. minuta for the macro aspects along with spores. But for the IKI reaction
Did you observe any marginal hair ? I can't see any on your pics. 

AmitiésMichel
Margot en Geert Vullings, 11-01-2024 17:07
Re : Small white dics on birch
Thank you Hans-Otto and Michel, it will stay with Hyaloscypha.
We didn't see any hairs.

Kind regards,
Margot &Geert