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Champignon imparfait sur Diplophyllum albicans
Bernard CLESSE, 31-12-2018 14:06
Bernard CLESSEBonjour à tous,

Quelqu'un aurait-il une idée sur ce champignon imparfait sur feuilles d'hépatique à feuilles (Diplophyllum albicans) ?

Bernard
  • message #55676
  • message #55676
Martin Bemmann, 01-01-2019 18:44
Martin Bemmann
Re : Champignon imparfait sur Diplophyllum albicans
Dear Bernard,

this reminds me on this:


(see also the continuing chapters)

I don't know if there was a result in the end. But maybe thist is a "piste".

Best regards

Martin
Bernard CLESSE, 01-01-2019 18:51
Bernard CLESSE
Re : Champignon imparfait sur Diplophyllum albicans
Great thanks for your message, Martin !

Best regards,

Bernard
Georges Greiff, 01-01-2019 19:37
Re : Champignon imparfait sur Diplophyllum albicans
Very interesting. I have seen a similar kind of fungus on the leaves of Polytrichastrum formosum but even smaller. This is probably not described but I can check in Racovitza 1959 - do you have this book?
Martin Bemmann, 01-01-2019 20:00
Martin Bemmann
Re : Champignon imparfait sur Diplophyllum albicans
Georges Greiff, 02-01-2019 17:51
Re : Champignon imparfait sur Diplophyllum albicans
Looking in Racovitza I see a mitosporic species "Sclerotium sp" found on Diplophyllum albicans. Racovitza, p260. This does not seem right for that but may be worth a look. I will keep an eye out for this type of fungus in the field.

Georges
Bernard CLESSE, 02-01-2019 21:16
Bernard CLESSE
Re : Champignon imparfait sur Diplophyllum albicans
Thank you for your message Georges, 

I actually saw this quote from Sclerotium on Diplophyllum albicans. A. Racovitza did an extraordinary work, what a job !

Bernard
Zdenek Palice, 03-01-2019 10:06
Zdenek Palice
Re : Champignon imparfait sur Diplophyllum albicans

Hallo,


I would say the pycnidia belong to the lichenized fungus Micarea botryoides (Nyl.) Hedl. (eventually to a closely related taxon - there may exist undescribed taxa within this group of Micarea)


it is not a rare species on shaded sites, it shows quite a broad ecology, growing on rocks and bryophytes/detritus on them, switching also to shaded bark, it prefers sites protected from rain, dark convex, often tuberculate apothecia are formed not so often


Zdenek

Bernard CLESSE, 03-01-2019 12:06
Bernard CLESSE
Re : Champignon imparfait sur Diplophyllum albicans
Very interesting hypothesis, Zdenek, thank you very much!

Bernard
Martin Bemmann, 03-01-2019 12:19
Martin Bemmann
Re : Champignon imparfait sur Diplophyllum albicans
Are these pycnidia? I was thinking on short synnemata.

best

Martin
Zdenek Palice, 03-01-2019 12:39
Zdenek Palice
Re : Champignon imparfait sur Diplophyllum albicans

I guess, the fungus from the link to a blog is something else, synnematose, indeed.


In this case I expect pycnidia of Micarea.


Micarea botryoides is quite a common lichen and superficially may resemble a synnematous non-lichenized fungus. Most species of Micarea contain a small-celled 'micareoid' alga (with cell 4-7 um) so you may check this. Pycnidia of M. botryoides also should contain 'cinereorufa-green' pigments that are reddish-purplish with adding of nitric acid, and intensifying green with KOH 


See also the exceptional monograph on Micarea by Coppins (1983) for pycnidia and other details on ecology , morphology , taxonomy: https://ia801406.us.archive.org/17/items/bulletinofbritis11britlond/bulletinofbritis11britlond.pdf

Angel Pintos, 03-01-2019 12:49
Angel Pintos
Re : Champignon imparfait sur Diplophyllum albicans
The image leaves a lot for the imagination, I do not see any pycnidium, I do not see any synnemata either. Can it be a sporodochium with a spore mass?