
05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o

02-07-2025 18:45
Elisabeth StöckliBonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

04-07-2025 20:12
Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33
Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00
Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43
me mandan el material seco de Galicia (España)

03-07-2025 18:40
me mandas el material seco de Galicia (España) re

Collected in Portugal, Algarve, nature reserve Fonte Benemola north of Loule, 3.1.2018.
Substrate is Arundo donax, as the leaf remains were partly still adhering to the thick lying stems. Unfortunately, most of the collection is badly ripe but I think I could get most of the important characters. Unripe spores in the asci mostly were much smaller (maybe 12-15 µm) than the free ones I measured here.
The IKI-reaction of the asci is weak and cannot be seen at all asci. For some time, I was not at all sure to have an inoperculate discomycete - but my pictures clearly show the porus.
I think this should be looked for in the Sclerotiniaceae (?) - but I do not have a good idea about the genus and species.
Who can help?
Best regards from Lothar

I see true croziers on your photo, though a bit difficult to recognize, because also basal protuberances occur. This and the occurrence on Poaceae speaks for Rutstroemia calopus. In my folders this is the unpublished genus Clarireedia which exists only in the web. Actually, this group stands apart from Rutstroemia in phylotrees. It was suggested for the dollarspot disease Sclerotinia homoeocarpa, which clustered with a R. paludosa sequence in CBS (see my homoeocarpa folder).
Zotto

Hello Zotto,
thanks a lot for your expertise. I had thought of R. calopus but got away of it because I found the spores not typical for a Rutstroemia.
Nice to have a name, then :-)
Thanks again and best regards, Lothar