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Mot de passe perdu?

29-05-2026 15:35

Fusarium sur Robinier

daniel FERRE

Bonjour à tous,Je voudrais votre aide pour cette

28-05-2026 16:15

Literature request: Caloscypha fulgens f. caesioalba

James Mitchell

Hello,Does anyone have the original publication of

28-05-2026 11:06

Stictidaceae (?) on Typha latifolia - short-spored, I+ - Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10596750

23-05-2026 11:44

Coprophilous pyrenomycete wild boar dung

Charles Grapinet

Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:44

Ascomata under epidermis Carex

François Bartholomeeusen

Hi forum members,During an excursion organised by

26-05-2026 21:25

small ascomycetes on Quercus sp.

Dirk Gerstner

Hello everyone, I'm completely stumped by this li

26-05-2026 22:44

Incrucipulum capitatum ?

Ethan Crenson

Hi all, I think I have Incrucipulum capitatum her

22-05-2026 14:44

minute Saccobolus from cow-dung (moist chamber from Portugal)

Lothar Krieglsteiner

Lothar Krieglsteiner

in unripe condition citrine yellow, then soon fadi

25-05-2026 16:35

Anamorphe d'Hypomyces aurantius ? sous saule cendré (Salix cinerea)

Bernard CLESSE

Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

22-05-2026 13:29

Pseudophacidium ?necans on Vaccinium myrtillus

Gernot Friebes

Hi,I am curious to hear your opinion on this mater

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