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01-06-2025 09:37

Octospora
Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

30-05-2025 10:20

Velutarina
Elisabeth Stöckli

Bonjour, Sur branches mortes de Salix en place (m

20-05-2025 22:15

Asco at the base of decaying fern
Francois Guay Francois Guay

I found this ascomycete at the base of a dead fern

30-05-2025 17:54

Petit disque poilu sur Urtica
Louis DENY

Hello forum!Touvé près de Belfort, altitude 350m

31-05-2025 00:51

Orbilia with fusiform spores
Ethan Crenson

Hello, Last week in New York City this Orbilia wa

30-05-2025 14:40

Black ascomycete.
Josep Torres Josep Torres

Hello.An ascomycete from last May 10th, sprouting

30-05-2025 17:55

Petit disque poilu sur Urtica
Louis DENY

Hello forum!Touvé près de Belfort, altitude 350m

30-05-2025 12:53

Discomycete on Pellia (liverwort)
Gernot Friebes

Hi,I'm struggling to find a name for this species.

17-05-2025 18:52

Gloeotinia sp. ?
Francois Guay Francois Guay

I found this interesting asco in Quebec,Canada las

28-05-2025 21:19

Conidiospores on rose twig and twig on Sambucus Nigra
Terje Kristiansen

The rose is intertwined with black elderberry.Prob

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Patellaria on Tilia
Martin Bemmann, 22-06-2009 22:57
Martin BemmannHello all,

this is a today's find on a dead branch of Tilia. I found the same or similar one in January but could not end in a "terminating" determination. So here is another try:
  • message #8281
Martin Bemmann, 22-06-2009 22:59
Martin Bemmann
Re:Patellaria on Tilia
Asci are 134-142 x 16-21 µm:
  • message #8282
Martin Bemmann, 22-06-2009 23:00
Martin Bemmann
Re:Patellaria on Tilia
Spores 40-50x9-10 µm:
  • message #8283
Martin Bemmann, 22-06-2009 23:01
Martin Bemmann
Re:Patellaria on Tilia
The exudate is darkblue with a greenish touch:
  • message #8284
Martin Bemmann, 22-06-2009 23:02
Martin Bemmann
Re:Patellaria on Tilia
IKI reaction is negative:
  • message #8285
Martin Bemmann, 22-06-2009 23:04
Martin Bemmann
Re:Patellaria on Tilia
A detail of the asco-tip (again in IKI):
  • message #8287
Martin Bemmann, 22-06-2009 23:09
Martin Bemmann
Re:Patellaria on Tilia
and a view of the mess on my preparation (IKI) with paraphyses and a lot of "free oildrops"(?)

Is it P. crassispora?

Best regards, Martin
  • message #8291
Jacques Fournier, 23-06-2009 10:18
Jacques Fournier
Re:Patellaria on Tilia
Hi Martin,
I do not know P. crassispora. Where is it cited?
Why not merely P. atrata? Hawksworth and Kutorga (1997) gave the wide range of (20-) 30-45 (58) x (6-)7-9(12) µm for the spores of this taxon. You should also check the number of septa, they gave 5-11.
Best wishes,
Jacques
Martin Bemmann, 23-06-2009 10:39
Martin Bemmann
Re:Patellaria on Tilia
Hi Jaques,

P. crassispora is a nom.prov. in the Key on Zotto's DVD. One of the features that separates them from atrata is the colour of the exudate that should not be bluish at atrata but "blackish-olive-brownish".

Best regards,
Martin
Jacques Fournier, 23-06-2009 10:45
Jacques Fournier
Re:Patellaria on Tilia
yes I agree this bluish colour is unusual and not typical for atrata. Glad to learn that! Thanks!
jacques
Martin Bemmann, 23-06-2009 22:56
Martin Bemmann
Re:Patellaria on Tilia
Thank you Jacques for your confirmation of the exudate colour.
I never saw atrata as it should be...
That's why I was unsure and asked for comments.

Best regards, Martin