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30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

27-06-2025 14:09

Åge Oterhals

I found this pyrenomycetous fungi in mountain area

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Dark spots on Caragana
Marja Pennanen, 11-01-2015 16:16
Hello forum,

these about 0,2 mm wide spots on Caragana turned to be pyrenomycetes.
They are much wider than high and seem to grow under the outermost layer of the bark.
The spores are at least now hyaline, 18-24x4-6 and contain 4 droplets.
The asci are about 70-120x9-12.

Help with the determination is truly welcome: Marja
  • message #33144
  • message #33144
  • message #33144
Alain GARDIENNET, 11-01-2015 22:02
Alain GARDIENNET
Re : Dark spots on Caragana

Hi Marja,


Probably an Arthopyrenia species.


Alain

Marja Pennanen, 12-01-2015 13:44
Re : Dark spots on Caragana
Cher Alain,

merci!

So, it may be a lichen.  This is an interesting piece of information for me.
I have thought, that lichens grow on a surface not under it...

Marja
Björn Wergen, 28-01-2015 12:30
Björn Wergen
Re : Dark spots on Caragana
Hi Marja,

indeed Arthopyrenia. This genus belong to a group of lichens called "pyrenocarpous lichens", because they simulate pyrenomycetes fruitbodies. They occur on the bark of various deciduous trees, in my region Arthopyrenia cinereopruinosa is commonest.

regards,
björn