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05-03-2026 10:07

Hulda Caroline Holte

Hello, I found and collected this species growing

14-03-2026 13:51

Thierry Blondelle Thierry Blondelle

Hi everybody Under Quercus ilex, i hesitate to na

12-03-2026 19:44

Enrique Rubio Enrique Rubio

Hi to everybody.Can you give me any suggestions ab

11-03-2026 17:36

Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

12-03-2026 15:45

Åge Oterhals

Dear forum,I found this small discomycete on a ver

08-03-2026 14:05

Thierry Blondelle Thierry Blondelle

Bonjour à tous,Sur 3 récoltes supposées de H. l

12-03-2026 16:17

Sylvie Le Goff

Bonjour à tousRécolté dans le 22 en France (ré

12-03-2026 14:37

David Wasilewski

These small ascomycota (1-3 mm) ere observed growi

11-03-2026 16:48

Bruno Coué Bruno Coué

Bonjour, je serais heureux d'avoir votre avis sur

09-02-2026 22:01

ruiz Jose

Hola, me paso esta colección en madera de pino, t

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Mollisia on rosa?
Mirek Gryc, 05-07-2022 15:37
Hi
Little mushroom and a big problem?
I have no idea for this mollisia!
She grew on the dead shoots of wild rose.
Most of the features are compatible with Mollisia rosae:
Croziers (-)
Reaction to KOH - very yellow.

The spores do not suit me at all, more like Mollisia prunicola?

(9.3) 9.7 - 12.6 (13.2) × (2.3) 2.5 - 2.7 (2.8) µm
Q = (3.4) 3.6 - 4.89 (4.9) ; N = 20
Me = 10.9 × 2.6 µm ; Qe = 4.3

Do you have any ideas?
Regards
Mirek
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Mirek Gryc, 06-07-2022 09:32
Re : Mollisia on rosa?
Welcome back
Since there is no proposal, maybe I will ask otherwise:
Has any of you found Mollisia prunicola on a different substrate like Prunus spinosa?
The Mollisia prunicola option seems to me quite real, the difference is only about the lack of croziers?
Regards
Mirek
Hans-Otto Baral, 06-07-2022 16:05
Hans-Otto Baral
Re : Mollisia on rosa?
I know also a few finds on Rubus fruticosus and R. idaeus. , but they are uncertain.

M. rosae is without croziers, but spores much above 9 µm are unknown to me. Your find is very special, never seen that.
Mirek Gryc, 06-07-2022 20:06
Re : Mollisia on rosa?
Hi Zotto
I have read your publication on M. prunicola. I do not have pdf so the translation took me some time but if I understood correctly, the collections of M. prunicola with Rubus did not completely correspond to this species.
I was afraid that I could not notice croziers, so I looked back the photos of my collections M. prunicola from Prunus. In these collections, croziers was clearly visible (see the attached photo).
The remaining features very similar to M. prunicola.
Thank you for your comments.
I will mark it as: Mollisia cf. prunicola (croziers -).
Regards
Mirek
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Hans-Otto Baral, 06-07-2022 21:42
Hans-Otto Baral
Re : Mollisia on rosa?
Which publication do you mean?
Mirek Gryc, 07-07-2022 11:25
Re : Mollisia on rosa?
When you use the translator, do such misunderstandings come out?
I mentioned the publication of A. Gminder: Studien in der Gattung Mollisia s.l. I.
I meant that you are one of the several authors of the taxon, so in total I consider this publication to be common.
Mirek
Hans-Otto Baral, 07-07-2022 12:35
Hans-Otto Baral
Re : Mollisia on rosa?
Ah, Gminder 1996. I send it by mail. I am only coauthor of the combination, not more.

The spores of prunicola in Gminder look very much like yours.

But the substrate cannot be Prunus. For a Rosa I wondered about the hairy-spiny twig, but I am sure you are right, such roses exist.
Mirek Gryc, 07-07-2022 13:32
Re : Mollisia on rosa?
Mentioning the Prunus, I meant my collection:
https://grzyby-pk.pl/gat_m/gat_mollisia_prunicola.php

It was my first collection but not the last one. Since then, I have already studied several others, also from Prunus. Similar features but in each case croziers was present.

In this case, it was probably Rosa canina.
Thank you again and best regards
Mirek
Andreas Gminder, 08-07-2022 08:34
Andreas Gminder
Re : Mollisia on rosa?
Dear Mirek,

I also have no idea for this species, which looks like M. rosae with the spores of M. prunicola. As the asci are IKI+, a Helicogonium parasitation is rueld out.
I would be very interested in an ITS sequence of this collection to compare with me sequences of rosae and prunicola!

all the best,
Andreas
Mirek Gryc, 08-07-2022 09:39
Re : Mollisia on rosa?
Hi Andreas
The collection was collected at the end of May this year (later I will provide more detailed data) so it is not very fresh anymore, I don't know if it doesn't bother? Dried at room temperature!
I collected quite a lot of material so I will gladly share with you, all you have to do is give me your address.
Regards
Mirek