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09-10-2013 20:07

Melastiza
Malcolm Greaves Malcolm Greaves

I went back to an area where I thought I had found

07-10-2013 20:56

Allophylaria clavuliformis?
Marcus Yeo

I recently found this discomycete on dead stems of

08-10-2013 19:01

need of literature
Christian Lechat Christian Lechat

Hi to all,does anybody have this paper: Stephano

05-10-2013 13:25

Peziza species
Ralph Vandiest Ralph Vandiest

Hello,I found these small Peziza in a wetland on a

07-10-2013 00:38

Lasionectria on lichen
Stip Helleman Stip Helleman

Hallo to all,last friday I collected a piece of a

06-10-2013 23:09

Small cup fungi
Ralph Vandiest Ralph Vandiest

Hello,I found these small bright yellow cups &

06-10-2013 00:25

Small Cup Fungi
Malcolm Greaves Malcolm Greaves

Could someone help with this small cup found on a

06-10-2013 15:35

Discomycete on wood with discoloration in red
Alex Akulov Alex Akulov

Dear friends,Today my wife find a Discomycete samp

28-09-2013 23:32

Diatrype polycocca on Acer negundo ?
Alex Akulov Alex Akulov

Dear Friends,Today on the dead fallen branches of

03-10-2013 19:05

Hymenoscyphus de Bouverans
Gilbert MOYNE

Voici un Hymenoscyphus qui me pose bien des problÃ

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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