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29-11-2024 21:47

Calycina heterospora
Yanick BOULANGER

BonjourJ'avais un deuxième échantillon moins mat

27-02-2026 17:51

Parasite de Evernia Prunastri
Michel Hairaud Michel Hairaud

Bonjour, Quelqu'un peut il me donner un conseil p

27-02-2026 16:17

Sydowiella or Melanconis teleomorph on Betula
Mathias Hass Mathias Hass

Hi, Found this on Betula, rather fresh fallen twi

27-02-2026 12:56

Conidiomata on Pinus sylvestris cones
Åge Oterhals

Found on fallen cones of Pinus sylvestris in midle

27-02-2026 11:21

Nemania diffusa complex
Yannick Mourgues Yannick Mourgues

Hi to all. Here is a specie that can may be relat

26-02-2026 22:06

Geoscypha
Malcolm Greaves Malcolm Greaves

Can someone explain the features that split Geoscy

26-02-2026 15:00

En madera sin determinar
Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia, recolectada

24-02-2026 00:21

Pezizale
Benoît Segerer

Hello,I'm new to this forum, I hope I won't be irr

24-02-2026 11:01

Anamorph on Tilia
Gernot Friebes

Hi,found on a branch of Tilia, with conidia measur

23-02-2026 11:22

lasiosphaerioid on pine cone with small, slender spores - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10584971

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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