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23-09-2020 16:41

Josep Torres Josep Torres

Hola. Pequeñas fructificaciones sobrias la superf

27-09-2020 10:53

Polina Havrysh Polina Havrysh

Dear community!There's a coelomycetes fungus on Ta

26-09-2020 17:20

Gérard MELARD

Bonjour,Je cherche à identifier ce champignon sur

25-09-2020 18:06

Andgelo Mombert Andgelo Mombert

Bonsoir, Un petit Unguiculariopsis intéressant.

25-09-2020 16:41

Thomas Læssøe

Any thoughts on this one:https://svampe.databasen.

25-09-2020 11:01

Mirek Gryc

Hi One small ascomata (about 8 mm in diameter) fo

24-09-2020 17:08

Garcia Susana

Apotecios estipitados, de hasta 1mm de diámetro.

24-09-2020 16:05

Angel Pintos Angel Pintos

Anybody can help with this?:Rhinocephalum chochrja

05-01-2019 14:57

Edvin Johannesen Edvin Johannesen

These orange "jelly"-like apothecia grow at the ap

21-09-2020 08:57

Castillo Joseba Castillo Joseba

De ayer en madera de FagusPelos hasta 1533µA ver

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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.