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Edvin Johannesen
These tiny (0.2-0.6 mm), white, pulvinate apotheci
23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
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Marcel Heyligen
Found on a barked branch, 14 mm in diameter, of Ro
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S. RebeccaWe just had the Bavarian Mycology Conference in Au
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Ethan CrensonHello all, This was found last weekend on a hardw
Disco on Rumex
Chris Yeates,
02-09-2021 18:17
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
Peter Thompson,
02-09-2021 18:23
Re : Disco on Rumex
Hello Chris,
Dasyscyphus castaneus? Parasitic on Stictis spp.
With Best Wishes,
Peter.
Dasyscyphus castaneus? Parasitic on Stictis spp.
With Best Wishes,
Peter.
Stip Helleman,
02-09-2021 21:04
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
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