09-11-2025 13:20
Josep Torres
Hello.A tiny ascomycete, appearing as erupting gra
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Francois Guay
I found this species in Quebec, Canada, on herbace
04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
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Edvin Johannesen
Hi! One more found on old Populus tremula log in O
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
Hypoxylon rubiginosum?
Riet van Oosten,
06-05-2023 15:45
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
Riet van Oosten,
06-05-2023 15:54
Re : Hypoxylon rubiginosum?
Ruud thinks the wood is softwood.
I tried woodanatomy, but only got a tangential section.
I wonder if this is softwood.
Martin Bemmann,
06-05-2023 18:37
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
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!