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30-09-2020 20:18

Thorben Hülsewig

Hi there, i found this asco on 25.09.2020 on a Fa

30-09-2020 11:49

Malcolm  Greaves Malcolm Greaves

Can I ask for opinions on this Scutellinia.Small g

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Joop van der Lee Joop van der Lee

Found on horse dung.Not directly recognized as a P

30-09-2020 07:16

Angel Pintos Angel Pintos

hello,anybody has this articles:Rhinocephalum choc

26-09-2020 17:20


Bonjour,Je cherche à identifier ce champignon sur

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Valencia Lopez Francisco Javier

Hola a todosTengo estos Thecotheus sp recolectados

27-09-2020 20:28

Mirek Gryc

Hi.Several fruiting bodies grew from a piece of st

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Andgelo Mombert Andgelo Mombert

Bonsoir, Un petit Unguiculariopsis intéressant.

23-09-2020 16:41

Josep Torres Josep Torres

Hola. Pequeñas fructificaciones sobrias la superf

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Polina Havrysh Polina Havrysh

Dear community!There's a coelomycetes fungus on Ta

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Hymenoscyphus laetus
Miguel Ángel Ribes, 18-03-2011 10:32
Miguel Ãngel RibesGood morning

This Hymenoscyphus is from Fuente del Paco, Huesca, Pyrenees, in a mixed forest of Fagus sylvaticus and Abies alba, 2-4 mm broad.

Spores (1000x, water, fresh material)
(13.4) 14.9 - 18.0 (23.9) x (3.9) 4.5 - 5.4 (5.8) µm
Q = (2.6) 2.9 - 3.8 (4.8) ; N = 67
Me = 16.5 x 4.9 µm ; Qe = 3.4

Are you agree with H. laetus?

Thank you.

Miguel Á. Ribes
  • message #14772
Miguel Ángel Ribes, 18-03-2011 10:33
Miguel Ãngel Ribes
Re:Hymenoscyphus laetus
Asci with croziers and apex blue with IKI
  • message #14773
Miguel Ángel Ribes, 18-03-2011 10:34
Miguel Ãngel Ribes
Re:Hymenoscyphus laetus
Spores in water
  • message #14774
Miguel Ángel Ribes, 18-03-2011 10:35
Miguel Ãngel Ribes
Re:Hymenoscyphus laetus
Paraphysis plenty of guttules
  • message #14775
Miguel Ángel Ribes, 18-03-2011 10:36
Miguel Ãngel Ribes
Re:Hymenoscyphus laetus
And finally ectal excipulum, I think with prismatic texture.

Thank you

Miguel Á. Ribes
  • message #14776
Hans-Otto Baral, 18-03-2011 14:23
Hans-Otto Baral
Re:Hymenoscyphus laetus
Did you find this in autumn? The substrate would be interesting: Abies and Fagus are easily distiinguished when breaking the twig (Fagus with distinct radial rays).

This is H. calyculus. H. laetus has very short stipes and the spores are completely homopolar (the spores on your pic have an upper and lower end, though not very distinct: slightly scutuloid).

Miguel Ángel Ribes, 18-03-2011 14:41
Miguel Ãngel Ribes
Re:Hymenoscyphus laetus
It is dated on 11-Oct-2010. I wiil check the wood, I think it is Fagus.

Perhaps in this photo the scutuloid spres are more clear.

Thank you Zotto

Miguel Á. Ribes
  • message #14790
Hans-Otto Baral, 18-03-2011 22:27
Hans-Otto Baral
Re:Hymenoscyphus laetus
yes, that's fine! And also the sheath bis visible here that detaches from the spores.

H. laetus is restricted to calcareous rivulets where it grows on wet wood lying for a long time in the running but shallow water.

Raúl Tena Lahoz, 19-03-2011 19:10
Raúl Tena Lahoz
Re:Hymenoscyphus laetus
Hi Miguel Ángel & Zotto
Here two links with my pics about Hymenoscyphus laetus:
But I saw a strange reaction in some tips of the asci. Not all reacted like that but it was striking to see some half red-half blue! Maybe due to the soaked habitat?
Also some carotenoids guttules in subhymenium.

  • message #14806
Hans-Otto Baral, 19-03-2011 23:14
Hans-Otto Baral
Re:Hymenoscyphus laetus
ah, you see the upper ring reddish. Did you also test KOH-pretreatment? Maybe the upper ring turns then also blue?

I must correct myself, I think Miguels colection is H. subferrugineus. I once thought that H. calyculus is frequent, but I actually did not see it for a long time. It has larger spores with larger LBs inside, but I admit the distinction to subferrugineus is not really clear.

Raúl Tena Lahoz, 20-03-2011 15:05
Raúl Tena Lahoz
Re:Hymenoscyphus laetus
Thanks Zotto
Yes, the upper ring red (hemiamyloid) and more down blue (euamyloid). Not tested KOH-pretreatment. I will check it when I get it again (I think it is common in my area).
Should I see then (after KOH-pretreatment) two types of blue if it is an hemiamyloid reaction? If upper part remains unstained (also after KOH-pretreatment, as in the attached image), then no hemiamyloid reaction?, so red colour is maybe then because of my IKI composition?
I attach an image of Hymenoscyphus caudatus asci (find on Populus nigra leaves) in IKI after KOH-pretreatment.

  • message #14814
Hans-Otto Baral, 20-03-2011 17:59
Hans-Otto Baral
Re:Hymenoscyphus laetus
I rarely saw such differences between blue and red in a single ring. If so, this diference will change to uniformly blue after KOH. If the upper ring does not get blue thereby, it s something else I do not understand.

Raúl Tena Lahoz, 20-03-2011 18:42
Raúl Tena Lahoz
Re:Hymenoscyphus laetus
Ok, thanks again.
Miguel Ángel Ribes, 21-03-2011 00:58
Miguel Ãngel Ribes
Re:Hymenoscyphus laetus
Hi Zotto, Raúl

I did not picked up this collection, but I know the place, and it is not so wet like Raul's collection of H. laetus.

I think spores of my collection are closer to your plates of H. subferrugineus than H. calyculus, thank you Zotto, so H. subferrugineus, by the moment.

Thank you,