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28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

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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.

Chris
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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,
Peter.
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.

cheers,

Stip
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