Accès membres

Mot de passe perdu? S'inscrire

17-09-2025 16:14

Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

16-09-2025 12:53

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a digital copy of the seco

14-09-2025 22:16

Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

13-09-2025 14:10

Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

« < 1 2 3 4 5 > »
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