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21-08-2025 18:09

Semble Thecotheus
Edmond POINTE Edmond POINTE

Bonjour Amis mycologues.Trouvé sur crottin de che

20-08-2025 19:04

Adelphella babingtonii - lacking much brown pigment
Ethan Crenson

Hello, This asco was found on the same wood as my

21-08-2025 02:18

Helicoma muelleri?
Stefan Jakobsson

On a necrotic section of a living Tilia cordata I

18-08-2025 23:15

S.vitreola?
Zoe Vélez Zoe Vélez

Hola foro, gracias por aceptar la creación de mi

19-08-2025 20:58

Hymenoscyphus ? on very wet wood
Ethan Crenson

Hi all, Here is what I believe to be a Hymenoscyp

12-08-2025 19:44

Literature request on Clypeosphaeriaceae
Enrique Rubio Enrique Rubio

Could someone send me a pdf copy of this article?S

18-08-2025 15:17

bitunicate ascomycete on dead Sphagnum from Norway
Lothar Krieglsteiner Lothar Krieglsteiner

... on 6.7.25 in a subarctic mire near a small lak

18-08-2025 15:07

pyrenomycete on dead parts of foliose liverwort from Norway
Lothar Krieglsteiner Lothar Krieglsteiner

.. 20.7.25, in subarctic habital. The liverwort i

19-08-2025 16:27

Strange fungus on rotten Quercus wood in stream
Paul Cannon

Hello all I have spent some time trying to work o

18-08-2025 22:59

Apothecie jaune en toupie
Yanick BOULANGER

BonsoirVoici un asco récolté le 08/08/2025Comme

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Small Mollisia
Juuso Äikäs, 14-05-2020 20:18
Mollisia is a difficult genus, but I decided to post this and see if there is any hope of knowing the species.

These grew on a fallen, decorticated hardwood branch. The size of the apos is much smaller than of the typical gray ones that I find often on moist wood. There was a faint yellow reaction with 40% KOH, but under the microscope in 3% KOH I didn't notice anything. 

Spore measurements: (7.9) 8.9 - 10.7 (10.8) × (2.9) 2.93 - 3.1 (3.2) µm, N = 8.
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Hans-Otto Baral, 14-05-2020 20:23
Hans-Otto Baral
Re : Small Mollisia
Did you view under the mic when the KOH reached the fungus? Simply mounting in KOH does not permit to see a reaction. 3% KOH would be enough, even 1% I think.

To state the apo diameter would be helpful too.
Juuso Äikäs, 16-05-2020 12:43
Re : Small Mollisia
The diameter of the larger ones is about 1/3 mm. I took some pieces on a microscope glass and put a cover slip on and then a drop of 3% KOH on the side (1st pic) and did the same with water (2nd pic). Looks a bit yellower in kOH, but nothing too dramatic.
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Hans-Otto Baral, 16-05-2020 16:41
Hans-Otto Baral
Re : Small Mollisia
Yes it is more yellow, but important is to view the instantaneous reaction. To photograph it needs rapidity. A possibility could be M. albogrisea ined., Phaeomollisia picea is a synonym but cannot be transferred to Mollisia because of Mollisia piceae (pers.) Quel. This species reacts yellow  in KOH.
Juuso Äikäs, 16-05-2020 17:15
Re : Small Mollisia
Alright, thanks again for the info. Here's one pic: before and immediately after applying KOH.
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Hans-Otto Baral, 16-05-2020 18:12
Hans-Otto Baral
Re : Small Mollisia
So this looks negative.
Juuso Äikäs, 16-05-2020 20:53
Re : Small Mollisia
Maybe I'll stay away from Mollisias for a while :).
Mirek Gryc, 16-05-2020 21:14
Re : Small Mollisia
Hi Juuso
This is not a good idea.
Mollisia is difficult but among them you can find a lot of interesting species.

Do not cover the preparation with a slide when checking the reaction to KOH. Put a drop of KOH on the slide slide and then dip a piece of ascocarp in it. If the fruiting body reacts to KOH, you will see a yellowish coating around it in a few seconds.
The second way is to apply a drop of KOH to the fruiting body hymenium. If the reaction is positive, the hymenium will change to +/- yellow.
The reaction is visible to the naked eye or after applying a magnifier.
To be sure, it is worth using both methods at the same time
Good luck
Mirek