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25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

24-04-2026 03:16

Trinacrium robustum?
David Chapados David Chapados

Found while looking at something else from wood in

22-04-2026 01:06

Neonectria ou thelonectria ?
Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

22-04-2026 20:17

Pseudaegerita spec.
Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

23-04-2026 06:46

Fungus sp
François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Peziza
Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

22-04-2026 19:12

Poilu, violet avec KOH
Louis DENY

Bonjour forum.Trouvé à Belfort, est de la France

21-04-2026 21:00

Hymenoscyphus sp
Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

21-04-2026 13:36

Wentiomyces-like on Salix
Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

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Black discomycete on Rhododendron ferrugineum
Gernot Friebes, 06-06-2018 12:46
Hi,

this one I collected on a dead branch of Rhododendron ferrugineum. The ascospores measure about 11-11,5 x 3,5-3,8 µm and are filled with numerous oil drops. The asci have croziers and are IKI-. The paraphyses are hyaline and slightly thickened apically. The medulla contains greenish material. Thanks again for your help!

Best wishes,
Gernot
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Hans-Otto Baral, 06-06-2018 13:03
Hans-Otto Baral
Re : Black discomycete on Rhododendron ferrugineum
Did you test KOH for ionomidotic?
Gernot Friebes, 06-06-2018 14:19
Re : Black discomycete on Rhododendron ferrugineum
There is indeed a yellowish/greenish pigment extracted in KOH. Do you have something specific in mind?
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Hans-Otto Baral, 06-06-2018 18:24
Hans-Otto Baral
Re : Black discomycete on Rhododendron ferrugineum
It should be a Cordieritidaceae, and there it is very difficult to give a name.

I have a folder Phaeangella which is a potential name for these fungi.  Compare "semilichenia" and P. ulicis. They are quite similar but their DNA is very divergent!

Your fungus will be difficult to distinguish from them by morphology I fear.

How large are your apos?
Gernot Friebes, 06-06-2018 19:58
Re : Black discomycete on Rhododendron ferrugineum
Great, thanks. That does look very similar. The apos are around 0,5 mm in diam.

Best wishes,
Gernot
Hans-Otto Baral, 06-06-2018 21:43
Hans-Otto Baral
Re : Black discomycete on Rhododendron ferrugineum
Und das war richtig in den Alpen? Wahrscheinlich hat auch daran Guy großes Interesse.
Gernot Friebes, 06-06-2018 21:49
Re : Black discomycete on Rhododendron ferrugineum
Der Fundpunkt ist ± identisch mit den Orbilien, die ich dir heute geschickt habt (nur etwas weiter SW).