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03-02-2013 19:50

Helotium schimperi
Nina Filippova

Good time), I've compared this specimen with the

17-02-2026 17:26

Recherche biblio Lambertella WHETZEL 1943
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

08-12-2025 17:37

Cucurbidothis parmeliarum (pithyophila var. cembrae) - on Abies
Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 09:41

Diaporthe spiculosa?
Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

17-02-2026 13:41

recherche de publi
Isabelle Charissou

Bonjour, est-ce que quelqu'un pourrait me fournir

16-02-2026 18:34

Exosporium tiliae
Thierry Blondelle Thierry Blondelle

Bonjour,La micro de cet anamorphe de Hercospora su

16-02-2026 21:25

Pyreno in the bark of Lonicera xylosteum
Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

16-02-2026 17:14

Cucurbidothis specimens?
Joanne Taylor

Last week we published the following paper where w

16-02-2026 16:53

recherche de publi
Isabelle Charissou

Bonjour, quelqu'un pourrait-il me transmettre un

16-02-2026 00:05

Literature request
Maren Kamke Maren Kamke

Good evening, I am looking for the following pape

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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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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