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13-05-2026 15:26

FranÃ§ois FrelÃ©choux

François Freléchoux

Bonjour,Voici une récolte faite il y a quelques j

12-05-2026 15:41

Pezizomycetes of Europe: help us to improve their knowledge

Nicolas VAN VOOREN

Nicolas VAN VOOREN

Dear Ascolovers, especially interested in Pezizale

13-05-2026 12:05

Scutellinia crinita ?

Thierry Blondelle

Thierry Blondelle

Bonjour à tous,J'aimerais avoir confirmation de c

11-05-2026 12:32

Hélotiale à paraphyses à exsudat brun jaunâtre

Bernard CLESSE

Bernard CLESSE

Pourriez-vous m'aider à identifier cette héloti

10-05-2026 23:17

Scleromitrula (?) from decaying leaves of Fagus/Acer

Andreas Gminder

Andreas Gminder

Hello,today we found in a moist steep decidous for

28-04-2026 20:07

Marthamycetales? - from Portugal

Lothar Krieglsteiner

Lothar Krieglsteiner

... on twig in the air at standing Ceratonia siliq

27-04-2026 20:52

Mollisia or related genus from Portugal - with quite peculiar character

Lothar Krieglsteiner

Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

11-05-2026 20:22

Orbilia from Portugal

Lothar Krieglsteiner

Lothar Krieglsteiner

on attached twig of standing Ficus caricaquite uns

11-05-2026 13:22

Sylvie Le Goff

BonjourPuis avoir votre avis sur cet ascome, je vo

29-04-2026 10:44

Boudiera from Portugal

Lothar Krieglsteiner

Lothar Krieglsteiner

growing at moist, drying-out soil at the side of a

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