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11-01-2026 20:35

Pyrenomycete on Conifer Wood
Josep Torres Josep Torres

Hello.A very tiny pyrenomycete sprouting sparsely

09-01-2026 17:41

Bryonectria callicarpa Döbbeler; ein Bryoparasit auf Frullania dilatata
Arnold Büschlen

Hallo, F. dilatata wird von vielen Bryoparasiten

10-01-2026 20:00

Lichenicolous fungus on Protoparmeliopsis muralis
Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

07-01-2026 22:22

Tatraea sp. on indet. hardwood - 303452087
Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

10-01-2026 01:18

cf. Neovaginatispora fuckelii on indet. shrub - 305938906
Danny Newman Danny Newman

cf. Neovaginatispora fuckelii on indet. shrub Pre

07-01-2026 10:24

Pezicula sp. on indet. hardwood - 303870019
Danny Newman Danny Newman

Pezicula sp. on indet. hardwood Appalachian Highl

09-01-2026 10:08

Orbilia posible aurantiorubra
Blasco Rafael Blasco Rafael

Hola, en el mismo habitat que la anteriorRetamaDia

08-01-2026 21:22

Orbilia pilifera posible
Blasco Rafael Blasco Rafael

Hola, He recogido esta muestra de Orbilia sobre Re

07-01-2026 17:29

White tree-like anamorph on Populus
Marc Detollenaere Marc Detollenaere

Dear Forum,On a barkless Populus I found some smal

10-11-2021 17:33

anamorph Chlorociboria aeruginella
Riet van Oosten Riet van Oosten

Add-on topic http://www.ascofrance.com/forum/7059

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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