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24-04-2024 21:54

éric ROMERO éric ROMERO

Bonjour, J'ai trouvé ce Lasiobolus sur laissées

23-04-2024 15:18

Lothar Krieglsteiner Lothar Krieglsteiner

... but likely a basidiomycete. I hope it is o.k.

23-04-2024 13:17

Edouard Evangelisti Edouard Evangelisti

Bonjour à tous, Je viens de récolter ce que je

23-04-2024 21:49

Ethan Crenson

Hello all, A friend recently found this orange as

22-04-2024 11:52

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I made a loan of a collection of Microstoma

11-01-2022 16:36

Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

22-04-2024 08:54

Rafael Cabral

Bonjour à toutes et tous, Quelqu'un pourrait-il

22-04-2024 20:38

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon.Does anyone know this anamorph?It g

21-04-2024 14:29

B Shelbourne B Shelbourne

• Genus Brunnipila: Distinct macro and habitat,

19-04-2024 14:28

B Shelbourne B Shelbourne

Cudoniella tenuispora: Distinctive macro and habit

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Rutstroemia???
Maria Plekkenpol, 09-09-2021 15:18
Hello,
On pieces of acorn cap buried in the ground were these cups. Fb about 4mm. Apothecium brown, very fibrillose all over. Not a real (longer) stem, but stem-like attached to the substrate.
Edge curled inwards. Hymenium black. I had everything ready to look through microscope: unfortunatly it broke down .. again. 
I have no idea of what to think, thanks for your help!
Maria
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Peter Püwert, 09-09-2021 15:31
Peter Püwert
Re : Rutstroemia???
Looks like Velutarina rufoolivacea.

Peter.
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Maria Plekkenpol, 09-09-2021 15:47
Re : Rutstroemia???
Thank you for this suggestion! I found this one once, but that were all very fresh fb's so the hymenium was greenish. Never saw it black before!

Thanks again!
Maria

Viktorie Halasu, 09-09-2021 23:31
Viktorie Halasu
Re : Rutstroemia???
Hello,
based on macro photo, I would consider Rutstroemia echinophila too. It can have rather dark hymenium sometimes (drying?).
Viktorie
Mirek Gryc, 10-09-2021 09:43
Re : Rutstroemia???
Hello all
Due to the strongly hairy external space, I would be prone to Peter's opinions. Firmly mature velutarina have hymenium colors of almost black. I have such a collection in my atlas:
https://grzyby-pk.pl/gat_v/gat_velutarina_rufo_olivacea.php
I also have a Rutstroemia Echinophila collection from Quercus, it looks completely different:
https://grzyby-pk.pl/gat_r/gat_rutstroemia_echinophila_quercus.php

Black Hymenium also has Catinella Olivacea but it looks different.
Hymenium Neodasyscypha cerina also darkens with age. I commonly occurs in the oak. I met them on wood but it's possible that it also grows on acorns?
You can compare:
https://grzyby-pk.pl/gat_n/gat_neodasyscypha_cerina.php
regards
Mirek

Maria Plekkenpol, 10-09-2021 19:41
Re : Rutstroemia???
Thanks very much for the suggestion! A friend will help me with her microscope, so I will check on Sunday!!
Maria
Maria Plekkenpol, 13-09-2021 18:50
Re : Viktorie, I think you were right!
Hello,
It was checked under mic on Sunday and to my big surprise it shows all the features of Rutstroemia echinophila like Viktorie suggested! But just to be sure I would like your second opinion very much.
Spores 17-21,5 x 5-5,5. Septated and with guttules. Some with conidia. Paraphyses with enlarged apex, filled dark brown. Asci 8-spored, 110-115 x 12-13. 
What draw attention was the fact that quite a lot of the spores became brown in H2O.
Searching for R. echinophila I did see some pictures where it looked the same. 

What would be your opinion?
Thanks!!! Maria
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Mirek Gryc, 14-09-2021 09:16
Re : Rutstroemia???
Hello
And this is beautiful in Ascomycota, which still surprise us :)
I congratulate the interesting collection and Viktorie for such an accurate designation.
Without watching microscopic features, I would never think that this species belongs to Rutstroemia.
Thanks to you, we still learn something new :)
regards
Mirek
Maria Plekkenpol, 14-09-2021 19:53
Re : Rutstroemia???
Hello Mirek,
Thank you for your reaction! I also thank all of you for helping me with this strange but educational puzzle hahaha!
And agree: they keep surprising and challenging us: and that's what makes it never dull.
We keep on learning, with help from people like Peter, Viktorie, you and all the others.
Maria