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25-02-2023 18:36

Nectria
Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

12-07-2025 16:45

Sur écorce de Hêtre
Thierry Blondelle Thierry Blondelle

Bonjour à tous,J'avais d'abord pensé à des stro

05-07-2025 12:38

Pyrenomycetous fungi on dead Juniperus twig
Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

01-06-2025 09:37

Octospora
Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Auda con esta
Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España) recolec

07-07-2025 19:22

Ascomycota
David Chapados David Chapados

Hi,Does anyone know what could this anamorph be?ht

02-07-2025 18:45

Sur Osmunda regalis
Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

04-07-2025 20:12

Black thready anamorph
Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Ascomycete on a herbaceous stem.
Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Salvia leaf parasite
Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

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Tiny asco on Fallopia
Camille Mertens, 03-04-2023 12:39
Hi all.

Collected on Fallopia end of january.
Spores slighty curved, guttulated, wrapped in a sheet : 11-12 x 3,6-3,9 µm
Ascus with croziers, IKI (-)
Branched paraphysis.

Seems to me closed to Allophylaria "petasites" on Zotto's webside illutrations.
An idea?
Best regards.

Camille
Hans-Otto Baral, 03-04-2023 14:44
Hans-Otto Baral
Re : Tiny asco on Fallopia
Hi Camille

that is indeed similar, although Björn measured (9-)10,3-12,4x2,6-3µm.

Your IKI I do not much trust, or you need to remove the KOH better, or even better let KOH away and show what IKI does.

The marginal excipulum doe snot look like an Allophylaria, in Björn's specimen the cells are elongate and thick-walled (gel). Did you also see VBs in the paraphyses that get red-brown in IKI by extruding red granules?

Zotto
Camille Mertens, 03-04-2023 19:43
Re : Tiny asco on Fallopia
Hi Hans

I agree this does not fit an Allophylaria.
IKI was negative. Therefore I tried KOH pretreatment.
I cannot remember a red-brown reaction in IKI.
I add a photo of paraphysis in Crb.
Many thanks.

Camille
  • message #75755
Hans-Otto Baral, 03-04-2023 20:25
Hans-Otto Baral
Re : Tiny asco on Fallopia
Sorry, these paraphyses are dead, there I cannot see anything. They must be alive, best in water. Not sure how to proceed. The excipulum near the base could be helpful too.

I see a minute reactive (amyloid) ring in your ascus (KOH+IKI). But since the photo does not show any iodine colour (yellow-brown), I wonder how this would turn at higher IKI concentration.
Camille Mertens, 03-04-2023 20:39
Re : Tiny asco on Fallopia
Many thanks Hans.

Gonna try to collect new ones.