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04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

31-10-2025 09:19

Lothar Krieglsteiner Lothar Krieglsteiner

Can somebody provide me with a file of:Rogerson CT

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What could this be?
Gerrit Jansen, 27-03-2014 15:38
Gerrit JansenHi all,

Could anyone give me an idea what this could be?

Thanks, Gerrit

On fallen branch of Salix. Apothecia diam 0.3-0.4 (0.5) mm, sessile.

Ascus contains 8 spores, iodine positive, 69-66 x 9-10 ?m, croziers present.


Paraphyses cylindrical width 2-3.5 ?m.


Spores non septate, 7-16.5 x 2-3.5 ?m; Qav.=4.4; n=15; spores taken from apothecium in Congo red in 5% ammonia.

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Chris Yeates, 27-03-2014 16:28
Chris Yeates
Re : What could this be?
Hello Gerrit
have you checked to see if there is a KOH reaction?
regards
Chris
Gerrit Jansen, 27-03-2014 16:52
Gerrit Jansen
Re : What could this be?
Hi Chris,
The apothecium turns yellowish greenish in 5% KOH.
Gerrit
Luc Bailly, 27-03-2014 18:30
Luc Bailly
Re : What could this be?
Hi Gerrit,
Also: could you take the size of spores just in water? In Congo read, that will disturb the measures. Check also if the spores aren't septate now and then.
Looking at the spores in water is absolutely necessary, because NH4OH and KOH can influence the number and look of the guttules.

Then, take Andreas Gminder's key: http://www.mollisia.de/Word_Dokumente/key.doc

Cheers - LUC.
Gerrit Jansen, 27-03-2014 21:32
Gerrit Jansen
Re : What could this be?
Hi Luc and Chris,

I measured the spores in water 12.7 x 2.9 um.

Thanks for the link to Andreas Gminders Mollisia key. With your help and the key I quickly arrived at Mollisia fusca.

Problem solved, thanks again.

Regards, Gerrit