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23-03-2026 13:24

Literature search
Paul Cannon

Could anyone provide me with a pdf of Auerswald'sÂ

20-10-2017 09:23

Hymenoscyphus ¿calycinoides?
Garcia Susana

Este otro crecía en el mismo trocito de madera qu

21-03-2026 15:13

MYXOMYCETICOLOUS FUNGI
Lepista Zacarias

Hello everyone, Does any one know of any literatu

21-03-2026 22:59

Hysteriaceae ??
Petr Soucek

Good evening, I would appreciate some advice on th

20-03-2026 12:53

Eutypa spec. (?)
Stefan Blaser

Hello everybody, In the field, from distance, my

20-03-2026 16:16

Pseudomassaria-like on Cornus alba
Edvin Johannesen Edvin Johannesen

These 0.5 mm diam. acervuli were breaking through

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
Filip Fuljer Filip Fuljer

Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

17-03-2026 10:09

Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

19-03-2026 15:58

"Lasiosphaerioid"
Stefan Blaser

Hello everybody, I hope for some hints... Macro:

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Micropeziza(?) on Chamaenerion
Stefan Jakobsson, 05-06-2022 02:07
On an old stem of Chamaenerion angustifolium on the ground I found a swarm of small brown disks together with many other discomycetes.

The disks are sessile, 80-200 µm wide, with a darker slightly raised margin. The exciple is covered with a crust covering everything and preventing a view of what is behind. A similar crust is in part also covering the hymenium (pseudoepithecium?). Asci eight-spored, 32-55 × 5.9-7.3 µm, the bases are so agglutinated that I dont't know about croziers, negative in Lugol with and without pretreatment. The spores are 7.0-8.0 × 2.6-2.9 µm, with a few small guttules at each end. The parafyses are slighly clavate, 3.0-4.2 µm at apex and unfortunately so easily dying that I can't say anything about their contents.


I can't find a Micropeziza with such small spores - or is it something else?

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Hans-Otto Baral, 05-06-2022 11:07
Hans-Otto Baral
Re : Micropeziza(?) on Chamaenerion
Good docu! Micropeziza has very striking VBs in the living paraphyses (in the apex). I am not sure if you saw living paraphyses here. I would check with KOH if the pigment gets dissolved.

In my Cordieritidaceae folder, subfolder "Skyttea = Durella redbrown", might be similar species, but they show the ionomidotic recation and I never saw them on herbs.
Stefan Jakobsson, 06-06-2022 01:18
Re : Micropeziza(?) on Chamaenerion
I added KOH to a water mount but I could observe no dissolving pigments.

But I think I found some living parafyses. They have a not very refractive guttule at the apex. They are very sensitive to pressure - as soon as I touch the cover slip they are mostly gone.


The crust of my fungus is very similar to the the one on photo "Durella, II.2014-2" in the Skyttea folder.

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Hans-Otto Baral, 06-06-2022 09:30
Hans-Otto Baral
Re : Micropeziza(?) on Chamaenerion
This all looks indeed like a Micropeziza, but I wonder why these VBs in the paraphysis apices are angular, not roundish. Maybe they are already distorted?

This is actually the same species as you have pointed out:

"Javier Balda: I found this on "dry Angelica still standing" croziers - IKI -". I am not sure with the absent croziers, but it could be. Did you make up your mind regarding croziers?

I put the two in a folder "Angelica + Chamaenerion" but fear they are misplaced in Cordieritidaceae.
Stefan Jakobsson, 06-06-2022 19:56
Re : Micropeziza(?) on Chamaenerion
I made another attempt to find croziers and the result is that I am about 55 percent sure there are croziers. When applying some pressure on the preparation to make it thinner the result is that most old asci break just below the last spore. Young asci never get clearly visible.

Thank you, I suppose this is as far as it is possible to get with morphology alone.

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Hans-Otto Baral, 06-06-2022 21:22
Hans-Otto Baral
Re : Micropeziza(?) on Chamaenerion
On the right picture it is clearly withput croziers (in case these are ascus bases). A possibility is that some asci have protuberances which do not rejoin. Complete croziers are required in order to be sure.