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29-06-2016 15:18

Per Vetlesen

HiIt was found on the bark of a dead branch of Jun

07-01-2018 22:47

Per Vetlesen

Grown in moist chamber on bark/resin of fallen Pin

06-04-2026 15:04

David Chapados David Chapados

Hi! Could someone help me identifying this specim

06-04-2026 21:36

Viktorie Halasu Viktorie Halasu

Hello, could anyone please send me the article wi

06-04-2026 19:40

David Gibbs David Gibbs

Help with this one much appreciated, on rotting Fa

06-04-2026 11:07

Louis DENY

Bonjour forum, Trouvé sur bois de feuillu très d

06-04-2026 16:24

Juuso Äikäs

Last Tuesday I found some tiny white Helotiales gr

05-04-2026 13:33

Sylvie Le Goff

Bonjour à tousPuis avoir votre avis sur ce champi

05-04-2026 20:40

Robin Isaksson Robin Isaksson

Hi!Found i Japan on bark of Abies sp. Spores 35-4

06-04-2026 08:15

Lothar Krieglsteiner Lothar Krieglsteiner

some days ago, on the lower surface of leaf of Que

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Hypoxylon rubiginosum?
Riet van Oosten, 06-05-2023 15:45
Riet van Oosten
Hello, found by Ruud van Middelkoop, April 2023, the Netherlands.

Is this Hypoxylon rubiginosum?

KOH extractable pigments orange

Yellow granules beneath the surface

Ostioles umbilicate

Asci J+

Spore sizes Me: 10.6 x 4.4 µm
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Riet van Oosten, 06-05-2023 15:54
Riet van Oosten
Re : Hypoxylon rubiginosum?
Ruud thinks the wood is softwood.

I tried woodanatomy, but only got a tangential section.

I wonder if this is softwood.
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Martin Bemmann, 06-05-2023 18:37
Martin Bemmann
Re : Hypoxylon rubiginosum?
Hi Riet,

do you think Robinia is possible (hardwood) for this site?


Best

Martin
Riet van Oosten, 06-05-2023 20:28
Riet van Oosten
Re : Hypoxylon rubiginosum?
Hi Martin,

Ruud did not notice any Robinias and he does not know if they were ever there, but Robinia could be, microscopically it looks very similar.

So we can exclude softwood :-)

Thank you very much!