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Mot de passe perdu?

17-09-2025 19:43

Lachnellula suecica ?

Philippe PELLICIER

Sur branche morte de Mélèze. Les ascospores sph�

17-09-2025 16:14

Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Ascomycete on Polystichum proliferum

Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Marthamycetales revision published

Jason Karakehian

Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

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Encoeliopsis rhododendri

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

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Ascolichen on Blechnum?

Enrique Rubio

Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Engler & Prantl, Nat. Pflanzenfam. (Ed. 2) 1938

Nicolas VAN VOOREN

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Hello.I'm searching for a digital copy of the seco

14-09-2025 22:16

Cheilymenia stercorea

Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Otidea platyspora or something else?

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 17:18

Pseudocoprotus catenipilus ???

Blasco Rafael

Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

Rutstroemia firma ou Rutstroemia alni ?

Bernard CLESSE, 18-02-2022 16:40

Bernard CLESSE

Sur 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

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