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24-11-2024 09:05

Bernard Declercq Bernard Declercq

Dear all,Collected on 5 cm diam. corticated branch

23-11-2024 18:18

Marc Detollenaere Marc Detollenaere

Dear all,On a branch of a dead deciduous tree (Sal

06-08-2024 23:10

Ethan Crenson

Hi all, In NYC I found this mushroom engulfed by

23-11-2024 15:01

Lydia Koelmans

I decided to look at seriously tiny black fungal d

19-11-2024 00:36

Pérez del Amo Carlos Manuel Pérez del Amo Carlos Manuel

Hace unos días encontramos numerosos ejemplares d

21-11-2024 17:21

Malcolm  Greaves Malcolm Greaves

This Geoglossum was found in a wet meadow. 7 sept

04-11-2024 17:32

Yves Antoinette

Bonjour, je pense qu'il peut s'agir de Trichoderma

19-11-2024 15:51

Francois Guay Francois Guay

Hi everyone, I found this Antinoa-like species las

19-11-2024 14:48

Watt John

Scoring the characters on Mal's Tombio key actuall

12-11-2024 16:43

Ethan Crenson

Hello all, This weekend a friend found these dark

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Diatrype disciformis on Betula?
Steve Clements, 25-04-2016 09:18
Bonjour, j'ai trouvé cet asco sur le bouleau – c'est comme Diatrype disciformis.
This asco was on a birch twig, and looks like Diatrype disciformis from the microscopy. Spores were deposited as a pale brownish deposit, and were 6-8 x 1-1.5.
Asci were 8-spored, biseriate, tips blueing with Lugol (I think), 40-45 x 5 um.
Perithecia were multitudinous, without long necks.
Small ostioles dotted the stroma surface.
Ellis and Ellis state that this species is occasionally found on birch. I'm hesitant to call it Diatrype disciformis however, as the habit of growth is pulvinate and quite unlike D. disciformis as found on beech ie "erumpent through stellate fissures".
Steve
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Alain GARDIENNET, 25-04-2016 21:13
Alain GARDIENNET
Re : Diatrype disciformis on Betula?

Hi Steven,


And what about Diatrype bullata ? The stroma looks like to be convex.


Alain

Steve Clements, 25-04-2016 21:21
Re : Diatrype disciformis on Betula?

Yes it does look more like D. bullata - which I know quite well. I assumed it was confined to Salix. However in Fungi of Switzerland it is said to occur on other broadleaf species, not just Salix. So I think that this is a better fit for my specimen.
Many thanks,
Merci bien,
Steve