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Mot de passe perdu?

28-11-2025 16:45

Ascocoryne lilacina?

Nogueira Héctor

November 23, 2025 Requejo de Sanabria (León) SPAI

25-11-2025 14:24

Anybody recognize this strange anamorphic fungus on Sambucus nigra, Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10490522

17-09-2025 10:50

Ascomycete on Polystichum proliferum

Heather Merrylees

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

27-11-2025 15:41

Hysteriales (Mytilinidion mytilinellum??) on Larix cone, with too? big spores - Denmark

Thomas Læssøe

Spores brownish, typically 4-celled; 26.8 x 2.4;

27-11-2025 12:01

Valsa/Cytospora on Cryptomeria bark - Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10496727

27-11-2025 11:46

another loculo on Aesculus with muriform spores - Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10493918

27-11-2025 11:31

Loculo on Aesculus - Denmark

Thomas Læssøe

Collectors notes: Immersed ascomata, erumpent thro

23-09-2025 13:31

"Bertia-like" Sordariales on Typha - Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10534623

26-11-2025 18:13

All Mycotaxon issue available in BHL

Jason Karakehian

Jason Karakehian

The entire run of Mycotaxon is now available throu

21-11-2025 15:22

Vasileios Kaounas

Vasileios Kaounas

Found in moss, forest with Pinus halepensis. Dime

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