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25-02-2023 18:36

Nectria
Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

05-07-2025 12:38

Pyrenomycetous fungi on dead Juniperus twig
Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

01-06-2025 09:37

Octospora
Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Auda con esta
Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

07-07-2025 19:22

Ascomycota
David Chapados David Chapados

Hi,Does anyone know what could this anamorph be?ht

02-07-2025 18:45

Sur Osmunda regalis
Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

04-07-2025 20:12

Black thready anamorph
Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Ascomycete on a herbaceous stem.
Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Salvia leaf parasite
Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

En tallo de herbaceas 1102
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

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Rutstroemia firma ou Rutstroemia alni ?
Bernard CLESSE, 18-02-2022 16:40
Bernard CLESSESur brindille morte de feuillu (non identifié mais peut-être d'aulne glutineux ?) au fond d'une vallée.


Dans l'eau, les spores font (sans les appendices) : 20-24x7-8,5 µm et les asques : 150-181x10-15 µm.


Je n'arrive pas à choisir entre Rutstroemia firma et Rutstroemia alni.

Merci pour vos conseils !

Bernard

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  • message #71867
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Hans-Otto Baral, 18-02-2022 20:44
Hans-Otto Baral
Re : Rutstroemia firma ou Rutstroemia alni ?
Neither of them. I suspect R. bolaris on Carpinus. You must study the ectal excipulum, is it of isodiametrical cells or prismatica?

R. alni has spores *17-24 x 7-9 (matching yours, whereas R. firma has *15-23 x 4.5-6. R. alni occurs with multiguttulate spores as well as with two large and many small LBs. No idea if this has something to say. In R. firma I never saw multiguttulate spores, which are characteristic of R. bolaris.

One reason for R. bolaris is, that you found it now. It is a sprin fungus, though my notes say III-IV. R. alni and R. forma are autumn fungi.

Try to find out the host, with a radial section it is easy to recognize Alnus by the ladder-like perforations that Carpinus does not have.
Bernard CLESSE, 18-02-2022 21:01
Bernard CLESSE
Re : Rutstroemia firma ou Rutstroemia alni ?
Yes Zotto, you are absolutely right. I was too quick in my conclusions and I had forgotten Rutstroemia bolaris which I nevertheless collected several times. Andgelo Mombert also put me back on the right track.

Kind regards,

Bernard
Michel Hairaud, 20-02-2022 21:25
Michel Hairaud
Re : Rutstroemia firma ou Rutstroemia alni ?
Bonsoir, 
Of course I approve R. bolaris . I only want to add that we regularly collect it in Februrary (in West of France) and even earlier than Bernard's find 
Michel
Bernard CLESSE, 20-02-2022 21:30
Bernard CLESSE
Re : Rutstroemia firma ou Rutstroemia alni ?
Grand merci pour ton info sur la phénologie de cette espèce, Michel ! 

Je me rappellerai de cet élément important signalé par Zotto et que tu me confirmes aussi !

Bien amicalement,

Bernard
Michel Hairaud, 20-02-2022 22:15
Michel Hairaud
Re : Rutstroemia firma ou Rutstroemia alni ?
Donc à l'année prochaine même époque, Bernard sur ce forum ? -:) Michel