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16-08-2022 20:07

Bernard Declercq Bernard Declercq

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Michel Hairaud Michel Hairaud

Bonjour à tous, Hi to all. This tiny bright yell

10-08-2022 15:45

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

02-08-2022 17:48

Pierre-Yves Julien

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Thomas Læssøe

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23-07-2022 20:47

Stefan Jakobsson

I made an abundant collection of some Preussia/Spo

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Marcus Yeo

While in NE Scotland recently I made a couple of c

05-04-2021 10:56

Sven Heinz Sven Heinz

Hello, does anyone have an idea what that could b

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14-08-2022 18:08

Edvin Johannesen Edvin Johannesen

Found on deciduous wood (probably Betula) in subal

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Mollisina (?) on seeds (samara) of Acer pseudoplatanus
Enrique Rubio, 29-04-2014 18:03
Enrique Rubio

Hi to all


My friend J. Linde, a great discover of minute fungi, collected these small, white, downy, shortly stipitate, briefly cupulate later pulvinate apothecia, 0.3-0.5 mm in diameter on seeds (samara) of Acer pseudoplatanus. 


Thea asci, 8-spored, are IKI negative and with croziers. The spores have only few minute guttules. Excipulum with textura + or - prismatica. The paraphyses are cylindrical, without conspicuous Vb's in water but stain in Crb. Close to the margin they become branched as the excipular hairs (marked with red arrows in the pic).


The very dense excipular hairs have finger-like protuberances as the Mollisina species. I think it could be a Mollisina but I don't know a species that fits well with our fungus.


 


Thanks for your opinion

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Guy Garcia, 29-04-2014 18:23
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus
salut Enrique,

As-tu comparé avec Mollisina acerina ?

Amitiés, Guy
Enrique Rubio, 29-04-2014 18:29
Enrique Rubio
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus

Salut Guy


My first idea was this species with IKI reddish asci and without croziers (fide Zotto). So I think is not possible.


Thanks

Stip Helleman, 29-04-2014 19:16
Stip Helleman
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus
Hi Enrique,
I agree with that species concept although I did note for my acerina collection IKI rb besides in acerina the spores are more ovoid (less pointed than in this collection). The only Mollisina I know with croziers is also undescribed on Pteridium leaves

regards,
Stip
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Enrique Rubio, 29-04-2014 19:39
Enrique Rubio
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus
Thanks, Stip. Thanks for your opinion
Hans-Otto Baral, 30-04-2014 21:09
Hans-Otto Baral
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus
There is a collection from Chemnitz which fits:

HB 9340, Chemnitz, Acer fruit. Ap. 0.3-0.6 mm diam., whitish, Calycina-like. Sp. cyl.-fusoid-clavate, *5-6.5 x 1.8-2 µm, Ölm.0,5-1. Asci ca. *28-37 x 5-6 µm, IKI 2rb, very dirty red. Hairs on exterior only as cortical cells with many small finger-like outgrowths. Exudate over exterior light golden-yellow.

I suppose it was with croziers, but my photos do not clearly show. I had it in the folder of Stip's one on Pteridium. I have kept the material and hope to reexamine it at some time.

Zotto
Enrique Rubio, 01-05-2014 20:14
Enrique Rubio
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus

Hi Zotto


Your HB 9340 fits well but 'my asci' have any reaction in IKI. I'm very sure of it!


Thanks! 

Hans-Otto Baral, 01-05-2014 21:00
Hans-Otto Baral
Re : Mollisina (?) on seeds (samara) of Acer pseudoplatanus
Ah, you mean your asci have no reaction to Lugol. Mine are medium strong first blue then dirty red (= 2rb), I know you understood. Well, Mollisina is another crazy genus....