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21-10-2021 13:57

Miguel Ãngel Ribes Miguel Ángel Ribes

Buenos díasMe han pasado esta Scutellinia recogid

21-10-2021 15:44

François Bartholomeeusen

Dear forum members,On a rotten piece of wood I fou

21-10-2021 13:26

Chris Yeates Chris Yeates

Bonjour tous While processing images of this deli

21-10-2021 21:09

Enrique Rubio Enrique Rubio

I would be grateful for an opinion on this Orbilia

20-10-2021 08:29

Mirek Gryc

Hello all.I would ask for help in identifying this

21-10-2021 20:14

Ronald Morsink

These i found on the side of a dry creek in the Ne

20-10-2021 21:37

Garcia Susana

Hola, He recogido este ascomyceto que crece de m

10-10-2021 17:35

Marek Capoun Marek Capoun

And one more question from me for today.It was the

18-10-2021 23:10

Jorge Hernanz

Hemos encontrado éste Geoglossum en hábitat alpi

18-10-2021 18:59

Thorben Hülsewig

Hi there,3 days ago I found this ascomycet on leav

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Disco on Rumex
Chris Yeates, 02-09-2021 18:17
Chris Yeates
Bonjour tous

This is a discomycete the colour of milky coffee, up to 0.5mm in diameter. The margin is slightly fringed. Growing with Stictis stellata and a yet to be explored pyrenomycete. On dead Rumex stem (probably R. obtusifolius).

Excipular cells rather thick-walled often with a globose guttule, in the living state active ?through Brownian motion. Paler apical cells forming the fringed margin.

Asci 8-spored, with croziers, apex IKI- with Baralsche Löhsung.

Ascospores small, ellipsoid, slightly curved in some views, consistently with two large guttules; 4.2-5.4 x 1.8-2.2µm.

As ever comments/suggestions welcome.

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Peter Thompson, 02-09-2021 18:23
Re : Disco on Rumex
Hello Chris,

Dasyscyphus castaneus? Parasitic on Stictis spp.

With Best Wishes,
Stip Helleman, 02-09-2021 21:04
Stip Helleman
Re : Disco on Rumex
Yes Peter and Chris a very good sugestion, I was thinking in Unguiculariopsis for mycroscopy of the hymenial elements and the excipulum. I think you might find it in Zotto's drive there. There is no valid combination made to my knowledge.


Chris Yeates, 02-09-2021 21:53
Chris Yeates
Re : Disco on Rumex
Thank you both

I doubt I would have managed to run this down without your help. I also doubt I wiould have considered Dasyscyphus and am a little surprised that Graddon saw the hairs as "granulis minutis dense incrustatis" they looked smooth to me, even under oil - I'll have another look.

I'm always amazed at how these parasites with rather specific hosts find them. Although this site is perfect for Stictis with a jungle of Epilobium, Urtica, Rumex, Filipendula etc. and I have collected Stictis stellata very close by, in quantity and on - rather surprisingly - dead leaves of Phormium tenax.

Thanks again, Chris