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01-03-2017 17:18

Enrique Rubio Enrique Rubio

Hi to everybodyCould you help me with a pdf copy o

18-09-2020 09:28

Viktorie Halasu Viktorie Halasu

Hello,this looks like Lophodermium petiolicolum, e

18-09-2020 12:45

Joaquin Martin

Hi,A colleague gave me this Pyrenomycete on Fagus

18-09-2020 10:15

Zugna Marino Zugna Marino

Buon giorno a tutti i colleghi.la specie che, a pr

18-09-2020 10:14

Zugna Marino Zugna Marino

Buon giorno a tutti i colleghi.la specie che, a pr

17-09-2020 11:07

Joop van der Lee Joop van der Lee

Normally Pilobolus are found on horse dung but thi

17-09-2020 09:19

Joop van der Lee Joop van der Lee

Found P. oedipus on horse dung yesterday.A perfect

17-09-2020 18:55

Juuso Äikäs

These were growing on a fallen trunk of a decidous

17-09-2020 19:38

Juuso Äikäs

I found these growing on a pile of dung in a fores

17-09-2020 17:53

Angel Pintos Angel Pintos

Hello anybody can provide this?Arx. Gen. Fungi Spo

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White Hymenoscyphus
Juuso Äikäs, 03-08-2020 20:40
I came by a shrub of some kind in a park-like environment and found these guys growing beneath it, on blackened twigs. 

The apos were fairly tough and yellowing. 

Asci with croziers, IKI+, paraphyses with VBs. If I interpreted correctly, the medullary excipulum is of textura intricata and ectal excipulum of textura prismatica. 

Spores:

(15.7) 16.7 - 18.9 (20.5) × (4) 4.3 - 4.9 (5) µm
Q = (3.2) 3.7 - 4 (5.1) ; N = 20
Me = 17.8 × 4.6 µm ; Qe = 3.9

Might someone know what the species could be?
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Hans-Otto Baral, 03-08-2020 20:43
Hans-Otto Baral
Re : White Hymenoscyphus
Well, this is the most comkmon discomycete since about 20 years: H. fraxineus, cause of the ash dieback disease. Differs from H. fraxineus merely by having croziers.

Both on blackened Fraxinus petioles.
Enrique Rubio, 03-08-2020 20:51
Enrique Rubio
Re : White Hymenoscyphus
Hi Zotto
Do you know if H. fraxineus has been found in Spain? I only see H.albidus.
Enrique
Juuso Äikäs, 03-08-2020 20:58
Re : White Hymenoscyphus
Ok then, thank you! H. pseudoalbidus is apparently an older name for it. Fraxinus isn't at all common here and I'm not too familiar with it. I thought it would be more tree-like. Or maybe that's some other plant and the petioles came from a nearby tree?
Hans-Otto Baral, 03-08-2020 21:22
Hans-Otto Baral
Re : White Hymenoscyphus
I am still unaware of  Spanish record. Even in Poitou-Charente I am not sure.

Certainly these are Fraxdinus petioles. The transsect should be bilateral-symmetrical (flattened).
Enrique Rubio, 03-08-2020 21:28
Enrique Rubio
Re : White Hymenoscyphus
It seems that Spanish ash trees are strong and still resist the advance of this fungus.
On the one hand I want to see the fungus, but on the other I don't.
Thanks, Zotto.
Hans-Otto Baral, 03-08-2020 21:35
Hans-Otto Baral
Re : White Hymenoscyphus
I can hardly believe that. maybe the climate is not good for the fungus, or the Pyrenees form a barrier. But in Croatia it occurs since many years.
Enrique Rubio, 04-08-2020 00:43
Enrique Rubio
Re : White Hymenoscyphus
It was just a joke.
Hans-Otto Baral, 04-08-2020 06:48
Hans-Otto Baral
Re : White Hymenoscyphus
It is hard to believe but it seems that there is no rapid spread by birds etc. but only by wind via a few 100 m per year. The height of the Pyrenees should not be a reason because in the Alps it occurs up to the subalpine region.
Martin Bemmann, 04-08-2020 10:24
Martin Bemmann
Re : White Hymenoscyphus
And what is worse: it jumps on Oleaceae other then Fraxinus:


as Phillyrea, native to mediterranian countries...

Regards

Martin
Enrique Rubio, 04-08-2020 11:20
Enrique Rubio
Re : White Hymenoscyphus
That's very interesting.
Thank you, Martin.