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17-02-2016 22:49

Ueli Graf Ueli Graf

Hello, I'm looking for  Donadini J.C.  1981 Le g

14-08-2022 18:08

Edvin Johannesen Edvin Johannesen

Found on deciduous wood (probably Betula) in subal

14-08-2022 15:50

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,this Orbilia grew on a strongly rotten branc

13-08-2022 17:18

Stephen Mifsud Stephen Mifsud

I assumed these are weak colonies of Neurospora on

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Pierre-Yves Julien

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

04-07-2022 18:45

Enrique Rubio Enrique Rubio

I can find no suitable answer for this white Bryos

11-08-2022 00:45

Stefan Jakobsson

On a thin deciduous stick (Salix/Alnus/Betula) on

10-08-2022 18:45

François Bartholomeeusen

Good evening all, On 5 August 2022, a friend gave

11-08-2022 08:16

Josep Torres Josep Torres

Hola.Un muy diminuto Pirenomyceto sobre un tronco

10-08-2022 09:11

Josep Torres Josep Torres

Hola.Un Piremomyceto recogido este pasado domingo

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Lasiobelonium nidulum sur Phalaris arundinacea ?
Bernard CLESSE, 18-05-2016 18:11
Bernard CLESSEBonsoir à tous, 

Je renvoie ce message car apparemment il ne vous est pas parvenu…

J'ai trouvé hier, sur tiges pourries de baldingère (Phalaris arundinacea) ce que je pense être Lasiobelonium nidulum. Pourriez-vous me le confirmer ?

a) poils cylindriques, septés, bruns, à extrémité hyaline, soit cylindriques à extrémité un peu enflée, soit coniques à base ampullacée
b)  asques IKI+, plus courts que les paraphyses
c) paraphyses lancéolées, plus longues que les asques : 69-84x5
d) spores étroitement fusiformes : 8-15x1,5-2 

Bernard
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Enrique Rubio, 18-05-2016 18:16
Enrique Rubio
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
Pourquoi non L. horridulum?
Hans-Otto Baral, 18-05-2016 18:52
Hans-Otto Baral
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
I see L. horridulum as a Lasiobelonium, but this here with its rather broad hairs with capitate apex is a Trichopezizella, and I see no clear difference to T. rubroguttatus.

I am unaware of samples on grasses however. Important would be to claruy the ascus base, then we could see if T. nidulus (without croziers) can be excluded, though this species never has such long spores.
Bernard CLESSE, 18-05-2016 21:24
Bernard CLESSE
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
Hi Zotto,

I've just made a new preparation and there is no crozier at the base of asci.

Therefore, is that it is Lasiobelonium nidulum ? I rechecked spore size and a lot of them reach 15 mu in length.

Bernard 

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Hans-Otto Baral, 18-05-2016 22:59
Hans-Otto Baral
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
This is wonderful work now, and I would exclude T. nidulus mainly because of the long spores and the restriction of that species to Polygonatum.

The problem is that T. rubroguttata occurs with and without croziers, and nobody knows if they are one species or more, or what character the type has.

But so far I had this species only on dicots. Could you do me a favour: cross-cut the culm and take a macrophoto of it: I think it should be easy to verify the host family. Forget this if your culm includes the nodes which are characteristic of Poaceae.
Bernard CLESSE, 19-05-2016 08:27
Bernard CLESSE
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
Hi Zotto,

I'm sure that the host plant is Phalaris arundinacea (Poaceae family, a family that I know well) but I will gladly do a macro shot of nodes and another of a culm section.

See you tonight.

Best regards,

Bernard
Bernard CLESSE, 19-05-2016 19:45
Bernard CLESSE
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
Hi Zotto,

This is a macrophoto of a section of a culm of Phalaris arundincaea and a second photo of Trichopezizella rubroguttata.

Best regards,

Bernard
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Hans-Otto Baral, 19-05-2016 20:07
Hans-Otto Baral
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
The culms look a bit angular, but I believe it. Better would be a closeup in prder to see the vascular bundles.
Bernard CLESSE, 19-05-2016 20:16
Bernard CLESSE
Re : Lasiobelonium nidulum sur Phalaris arundinacea ?
I cut the rotten culms with scissors so it's difficult to see their original round section.
But if you want I can try to make a fine cut and see under the microscope.

Bernard