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18-09-2025 08:35

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

17-09-2025 19:43

Philippe PELLICIER

Sur branche morte de Mélèze. Les ascospores sphÃ

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

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Unknown beheaded stubble lichen
Erik Van Dijk, 07-02-2022 19:22
I recently found in moisty riparian forest with willows along the Rhine the following lichen/fungus. It appeared like a beheaded stubble lichen. Investigation with the microscpe revealed in the top a collection of spores. 

The spores were 45-50 um by 3-4 um. 

See the following link.
https://waarneming.nl/observation/233387391/

Other observers in the Netherlands have found the same unknown species. See:  
https://waarneming.nl/observation/134021261
https://waarneming.nl/observation/223933166/

Does anyone has any idea?
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Adam Polhorský, 07-02-2022 20:40
Re : Unknown beheaded stubble lichen
I saw similar/same fungus recently, so I think I can help.
Look here https://doi.org/10.1139/b85-051
The best fit for your fungus seems Morrisographium boudieri.
Conidia from my collections often exceeded 50um so I decided for M. ulmi.

I think only M. boudieri is known from Europe, however I'm unsure of boundaries between these 2 species. Here are some pics https://drive.google.com/drive/folders/1a5WOxiTO_-fRC_ZTJqoL_CWG9EQta1Dg?usp=sharing

I saw it on Acer campestre and Cornus mas bark, what could be your substrate?
Erik Van Dijk, 08-02-2022 20:02
Re : Unknown beheaded stubble lichen
Thank you for you response.

It looks indeed rather similar. My substrate was willow. 

The entire genus Morrisographium is until not found in the Netherlands, but these tiny fungus might easily be overlooked.