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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

30-10-2025 03:53

Ethan Crenson

Hi all,  I would like an opinion on whether this

09-08-2025 13:13

Maria Plekkenpol Maria Plekkenpol

Hello,Yesterday I found these on burnt soil. Apoth

29-10-2025 19:02

Castillo Joseba Castillo Joseba

De la pasada semana en rama posiblemente de hayaPi

25-11-2016 13:54

Stephen Martin Mifsud Stephen Martin Mifsud

Hi, I found numerous seeds of Washingtonia robusta

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Psilachnum chrysostigmum
Dragiša Savic, 28-04-2014 09:52
On dead stem of Asplenium scolopendrium I found Psilachnum chrysostigmum (I think the determination is ok). Photo 1 and 2.
Similar type I found on the stem of Dryopteris filix-mas, photo 3 and 4.
The size of the spores is the same, 5.55 x 1.55
Is it the same or not?
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  • message #28956
  • message #28956
  • message #28956
Hans-Otto Baral, 28-04-2014 10:44
Hans-Otto Baral
Re : Psilachnum chrysostigmum
There are two very close species or varieties, P. chrysostigmum var. versicolor on A. scolopendrium, and P. chrysostigmum var. chr. on various ferns but apparently never on A. scolopendrium.

The difference lies mainly in the guttules in the spores, but you need free living spores to see that.

Zotto
Dragiša Savic, 28-04-2014 13:13
Re : Psilachnum chrysostigmum
Thanks Zotto, but this is the maximum of my microscope.
Hans-Otto Baral, 28-04-2014 13:21
Hans-Otto Baral
Re : Psilachnum chrysostigmum
Not a matter of resolution. The asci and spores of the left specimen are dead, those of the right are living. In the spores of the latter I can see that minute drops are at the ends of the spores. In the former I cannot decide.
Dragiša Savic, 28-04-2014 13:31
Re : Psilachnum chrysostigmum
Yes, the second preparation I did with water, as you have recommended.