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03-02-2026 20:44

Zetti Mario

When I first saw this white mould on an Agaricus s

18-08-2025 15:07

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

02-02-2026 14:33

Andgelo Mombert Andgelo Mombert

Bonjour,Sur le thalle de Peltigera praetextata, ne

31-01-2026 10:22

Michel Hairaud Michel Hairaud

Bonjour, Cette hypocreale parasite en nombre les

02-02-2026 09:29

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pour cette récolte de 2

01-02-2026 19:29

Nicolas Suberbielle Nicolas Suberbielle

Bonjour, Marie-Rose D'Angelo (Société Mycologiq

30-01-2026 22:49

éric ROMERO éric ROMERO

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

31-01-2026 09:17

Marc Detollenaere Marc Detollenaere

Dear Forum,On decorticated wood of Castanea,I foun

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Black on Betula bark?
Mirek Gryc, 26-05-2020 09:28

Hi.
On Betula bark, I recently found a species of mushroom that I do not know.
I once saw similar ones in this forum so I thought it would be more convenient to ask you for help instead of wasting time looking.
Thank you in advance!
Mirek
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Norbert Heine, 26-05-2020 12:23
Norbert Heine
Re : Black on Betula bark?
Hello Mirek,

this should be Helminthosporium caespitosum (= Corynespora caespitosa)

Here you can compare (pages 53-56, Fig. 6)

Norbert
Mirek Gryc, 26-05-2020 13:13
Re : Black on Betula bark?
Hello Norbert

Very nicely prepared article. I haven't read it yet but the pictures themselves show that this is probably the genre.
Thank you very much and best regards.
Mirek

Hermann Voglmayr, 27-05-2020 16:31
Hermann Voglmayr
Re : Black on Betula bark?
Agreed!

Best, Hermann
Mirek Gryc, 27-05-2020 20:53
Re : Black on Betula bark?
Hi.
Confirmed twice :)
In that case, nothing remains for me but to thank both gentlemen!
Thank you very much!
Mirek