Accès membres

Mot de passe perdu? S'inscrire

13-09-2025 14:10

Hymenoscyphus on Rubus
Wim de Groot

We found this hymenoscyphus on rubus fruticulosis.

13-09-2025 15:43

Recherche
Edmond POINTE Edmond POINTE

Bonjour Christian,J'ai trouvé deux spores ressemb

11-09-2025 16:57

Marthamycetales revision published
Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

13-09-2025 14:01

Otidea platyspora or something else?
Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 23:53

Strickeria kochii?
Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Pseudocoprotus catenipilus ???
Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

dark- and small-spored Sordariomycetes on Fraxinus - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Trichobolus
Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

Hymenoscyphus sp
ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

« < 1 2 3 4 5 > »
Velutarina
Elisabeth Stöckli, 30-05-2025 10:20
Bonjour,

Sur branches mortes de Salix en place (milieu humide à 830 m). Apothécies 1.5 – 2.5 mm de diamètre, cupuliforme, stipitée, l'hyménium jaune/vert, surface externe brune, asques octosporés, 135 – 210 x 11 – 14 µm, avec crochets, IKI-/KOH+MLZ-, spores lisses, d'abord hyalines, à maturité brunes, 11 – 15 x 7 – 8.5 µm, paraphyses septées, avec vacuoles réfringentes.


Je ne trouve pas d'espèce qui corresponde vraiment à ces caractéristiques. Qu'en pensez-vous ? Merci de votre avis.


Elisabeth

  • message #82782
  • message #82782
  • message #82782
  • message #82782
  • message #82782
  • message #82782
  • message #82782
  • message #82782
  • message #82782
Hans-Otto Baral, 30-05-2025 10:58
Hans-Otto Baral
Re : Velutarina
Hallo Elisabeth

the only deviation I see is the absent IKI reaction (absent apical thickening). This reminds me of V. bertiscensis but that has no VBs and larger multiguttulate spores which turn brown already inside the living asci. You don't have a photo of a mature living ascus?

Zotto
Martin Bemmann, 30-05-2025 11:06
Martin Bemmann
Re : Velutarina
And what about the crozieres?

Martin
Hans-Otto Baral, 30-05-2025 11:22
Hans-Otto Baral
Re : Velutarina
You are right Martin, I remember - I only wrote by memory.
Elisabeth Stöckli, 30-05-2025 11:57
Re : Velutarina
Merci pour vos avis.

Les spores mûrissent dans les asques, il y a aussi des spores en germination, parfois aussi dans les asques. Malgré cela, je ne vois pas d'espèce qui corresponde.

Elisabeth
  • message #82786
  • message #82786
Hans-Otto Baral, 30-05-2025 12:02
Hans-Otto Baral
Re : Velutarina
You must distinguish between living and dead asci. Germination in dead asci is banal. But your new photo with brown spores seems to concern a living ascus.

In V. rufoolivacea you will never find brown spores inside living asci.
Martin Bemmann, 30-05-2025 12:16
Martin Bemmann
Re : Velutarina
How about V. alpestris? The characters would fit.
Elisabeth Stöckli, 30-05-2025 12:33
Re : Velutarina
Non, je connais bien cette espèce, ça ne correspond pas (voir Cryptogamica Helvetica, Cenangiopsis alpestris, page 110).

Elisabeth
Hans-Otto Baral, 30-05-2025 15:57
Hans-Otto Baral
Re : Velutarina
Cenangiopsis alpestris has distinctly narrower spores and a conical ascus apex.

My folder rufoolivacea cf., S-America could be closer, it seems to have an unthickened apical ascus wall and probably ejects brown spores.
Ingo Wagner, 30-05-2025 17:28
Ingo Wagner
Re : Velutarina
Hi Elisabeth!

Which image shows asci + IKI?
And which shows asci + MLZ with KOH pretreatment?
I would repeat the test.
It would be nice to see more images with multiple asci.

Greetings
Ingo
Elisabeth Stöckli, 30-05-2025 23:05
Re : Velutarina
Voici des photos avec prétraitement KOH et MLZ.

Elisabeth
  • message #82803
Ingo Wagner, 30-05-2025 23:17
Ingo Wagner
Re : Velutarina
Hi Elisabeth!

MLZ stains brown.
Sorry, but nothing in your picture is brown.

Greetings
Ingo
Hans-Otto Baral, 31-05-2025 08:50
Hans-Otto Baral
Re : Velutarina
Hi Ingo

the second new photo is yellow, this is clearly iodine. In the first it seems the iodine was captured by the KOH.

The thin apical wall and absence of a ring structure excludes amyloidity in this find.
Ingo Wagner, 01-06-2025 11:10
Ingo Wagner
Re : Velutarina
Hello Elisabeth!

Only now do I understand that there's another image hidden under "Velutarina-sp-MLZ-0001."
This image, "croziers+," and Zotto's explanation of the "thin apical wall" rule out rufo-olivacea.
Please excuse my misunderstanding.

Best regards
Ingo