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09-04-2026 15:25

Slerotinia verrucispora ???
Jac Gelderblom

On bare soil between mosses Ifound an asco I deter

09-04-2026 13:55

Small-spored "Diplodia" on broom (Cytisus scoparius) - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10589176

09-04-2026 10:12

Melanosporalian on attached decayed wood on fallen Carpinus, Denmark - very long-necked
Thomas Læssøe

https://svampe.databasen.org/observations/10587061

08-04-2026 20:33

Gyromitra sp. ?
Vasileios Kaounas Vasileios Kaounas

Found 07-04-26, in Abies cephalonica. Diameter 1,

08-04-2026 10:39

Littérature Korf
FRANCIS FOUCHIER

Bonjour , je recherche en pdf cet article: KORF R

06-04-2026 15:04

Gnomoniaceae
David Chapados David Chapados

Hi! Could someone help me identifying this specim

29-06-2016 15:18

Scopinella
Per Vetlesen

HiIt was found on the bark of a dead branch of Jun

07-01-2018 22:47

Scopinella?
Per Vetlesen

Grown in moist chamber on bark/resin of fallen Pin

06-04-2026 21:36

Literature search
Viktorie Halasu Viktorie Halasu

Hello, could anyone please send me the article wi

06-04-2026 19:40

Nectriaceae on Fagus
David Gibbs David Gibbs

Help with this one much appreciated, on rotting Fa

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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