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02-11-2011 16:24

Small disco on leaves
Yatsiuk Iryna Yatsiuk Iryna

Dear friends! Do you have some idea about the gen

02-11-2011 13:26

Help with article/Demande de document
Raúl Tena Lahoz Raúl Tena Lahoz

Hi to all!Somebody can send me a scan of this arti

31-10-2011 18:59

Scutellinia sur polypore (Laetiporus sulphureus)
Lieve Deceuninck Lieve Deceuninck

Bonjour membres du forum Est-ce que je peux vous

31-10-2011 22:12

Lamprospora...
Jean Pierre Dechaume Jean Pierre Dechaume

Bonsoir à tous,Avec les documents de Gilbert, et

30-10-2011 14:52

Nectrialike on soil
Martin Bemmann Martin Bemmann

Hello,today I found on soil a nectriacious fungus

14-02-2011 22:32

Gnomoniaceae
Martin Bemmann Martin Bemmann

Dear all, few days ago I collected some overwin

30-10-2011 21:46

Asco inconnu
Renée Lebeuf

Bonjour vous tous, J'apprécierais grandement vot

29-10-2011 20:34

pulvinula
DirkW DirkW

salut a tous,does anybody know a current key to pu

29-10-2011 16:25

Cudoniella acicularis?
Renée Lebeuf

Bonjour vous tous, J'ai trouvé il y a quelques j

25-10-2011 17:37

Next one: Scutellinia erinaceus?
Björn Wergen Björn Wergen

Hi all,not far away from the mysterious Octospora

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Leptosphaeria on Cirsium
Gernot Friebes, 19-07-2010 15:39
Hi,

Leptosphaeria is a really complicated genus so I am not really sure about the two collections I collected two days ago. I would be happy if you could help me. :)

The first one here grew on a dry stem of Cirsium. Very conspicuous are the collapsing ascomata when they are older. The spores are (33)38-42 x 4.5-5 µm and 6-celled with the third cell swollen. The peridium consists of big and dark cells and the ostiolum is filled with hyaline to slightly brownish cells and not with periphyses.

With the paper by Müller (1950) I come to L. ogilviensis and I think that, according to some other descriptions, this species could be close to mine.

Best wishes,

Gernot


ascomata
  • message #12383
Gernot Friebes, 19-07-2010 15:42
Re:Leptosphaeria on Cirsium
spores (scale=10 µm):

  • message #12384
Gernot Friebes, 19-07-2010 15:43
Re:Leptosphaeria on Cirsium
asci (scale=10 µm):
  • message #12385
Gernot Friebes, 19-07-2010 15:43
Re:Leptosphaeria on Cirsium
sections (botton left corner: ostiole/scale=10 µm):
  • message #12386
Alain GARDIENNET, 19-07-2010 15:45
Alain GARDIENNET
Re:Leptosphaeria on Cirsium
Hi Gernot,
Have you photo of ascospores to see color and the sequence of septation ?
But I think L. ogilviensis is a good idea !

My answer came too quickly, photos were absent, and with the photos, I agree with ogilviensis.
Alain
PS : but are you sure of Cirsium. Could it be Valeriana or other else ?
Gernot Friebes, 19-07-2010 16:07
Re:Leptosphaeria on Cirsium
Hi Alain,

thanks for these quick answers!

Here I am not 100% sure about the substrate because there were so many other plants (but mainly Cirisum) around, maybe I am wrong with Cirsium. At least it had little spines which hurt me while trying to take photos of it...

I will compare my other find with fuckelii, thank you again!

Best wishes,

Gernot