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13-06-2025 09:41

Josep Torres Josep Torres

Hello.A cerebriform ascomycete sprouting scattered

21-07-2025 19:22

Ethan Crenson

Hello all,  Here is an Orbilia found by a friend

14-07-2025 11:20

Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

18-07-2025 23:03

Josep Torres Josep Torres

Hello.Fruitings between 51 and 130 microns in tota

17-07-2025 11:55

Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y abetos, en tieraEjemp

16-07-2025 17:34

Bernard Declercq Bernard Declercq

Hello,I have trouble distinguishing above mention

15-07-2025 13:27

Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

16-01-2023 21:31

Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

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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.