Hello,

today we searched for ascos in a wet mountain meadow with Filipendula, Dactylorhiza, Meum and Scirpus.

Besides Myriosclerotinia scirpicola and on Juncus Myriosclerotinia curreyana there was a small white substipitate hairy ascomycete on Scirpus leaves, very common there.

The lanceolate paraphyses and the not very differenciated hairs (in fact I couldn't really recognize them as "hairs") suggest the genus Psilachnum, though I didn't find the "Psilachnum-bubble" in the asci.
Psilachnum acutum looks similar, but the spores of our collection was far bigger, 8,2-10,6 x 1,8-2,3 µm, without oil content.

Asci 28-32 x 7-7,5 µm, with croziers, IKI bb 3

Do you have any suggestions?

thank you and best regards

Hans-Otto Baral, 12-05-2019 21:06

Re : Psilachnum (?) on Scirpus

When you look in my P. acutum folder there are several samples with a spore size like this or even more, including my old one Psilachnum acutum, HB 733.JPG.

I see several smaller bubbles in the asci, not very clear.

Zotto

Andreas Gminder, 12-05-2019 21:13

Re : Psilachnum (?) on Scirpus

Hello Zotto,

yepp, thank you - I just succeded in seeing a few asci with guttule, and also the hairs.

Is this species common?

B.t.w., I didn't succeed to find Pyrenopeziza in your folders - are they missing?

best regards,
Andreas

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Hans-Otto Baral, 12-05-2019 22:29

Re : Psilachnum (?) on Scirpus

Good guttule! These guttules may be inconsistent sometimes within a collection.

The last photo I do not understand.

Pyrenopeziza is in Ploettnerulaceae.