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20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

02-07-2025 18:45

Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

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Green ascomycete on Sorbus and Malus
David Malloch, 07-03-2011 19:03
David MallochHello,

After three or four years of seeing this fungus, and not being able to identify it, I turn to you all for help. It grows on old decorticated branches of Sorbus decora, and sometimes apple as well, in very dry and bleached areas of the wood, usually accompanied by Propolis farinosa, Cryptodiscus pallidus and Agyrium rufum. It is common in the winter.

The ascomata are green and erumpent through the uppermost layer of the wood. They start with a small pore like a pyrenomycete but later open widely like Cryptodiscus. The asci are unitunicate (I think) and do not have conspicuous apical structures. The living asci do not have any bluing in Lugol's, although the contents become orange. There are inconspicuous croziers. In the picture they are shown in Shear's Mounting Medium with Ink Blue.

The ascospores are 4 to 8 per ascus, hyaline, smooth and transversely 3-septate. Occasionally there is an oblique septum, but this is uncommon. They measure about 18-19 X 6-7 µm.

Does anyone recognize this fungus?

Regards,

Dave
  • message #14612
Gernot Friebes, 07-03-2011 19:47
Re:Green ascomycete on Sorbus and Malus
David Malloch, 07-03-2011 19:54
David Malloch
Re:Green ascomycete on Sorbus and Malus
Hi Gernot,

Thanks for the tip. I guess I overlooked that group of posts.

Dave