09-01-2026 10:08
Blasco Rafael
Hola, en el mismo habitat que la anteriorRetamaDia
08-01-2026 21:22
Blasco Rafael
Hola, He recogido esta muestra de Orbilia sobre Re
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Danny Newman
Pezicula sp. on indet. hardwood Appalachian Highl
07-01-2026 22:22
Danny Newman
Tatraea sp. on indet. hardwood The Swag, Great Sm
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Marc Detollenaere
Dear Forum,On a barkless Populus I found some smal
10-11-2021 17:33
Riet van Oosten
Add-on topic http://www.ascofrance.com/forum/7059
07-01-2026 10:05
Danny Newman
cf. Chaetospermum on XylariaCosby Campground, Grea
02-01-2026 17:43
MARICEL PATINOHi there, although I couldn't see the fruitbody, I
04-01-2026 17:45
Stephen Martin Mifsud
I was happy to find these orange asmocyetes which
Hello everyone!While working through the finds from last Sunday, I found groups of fruiting bodies of Lachnum virgineum whose hymenium was discolored purple.
Since I do not remember any "chemical abuse" of the find, I suspect a parasite as the cause of the coloration.
Does anyone know this discoloration and its cause?
Many thanks and best regards
Harald
I think the coloration is due to growth of bacteria.
Yours, Lothar
Following David's suggestion, I tried to make cross-sections of the infected fruiting bodies.
Here is the result with 16x and 100x objective.
It looks to me as if the hymenium is dissolved by the parasite and only the hairs, subhymenium and excipulum remain.
The obviously slimy layer of the parasite seems to have rod-like structures - bacterial parasite?
Best regards
Harald
This parasite is very common on Lachnum and Phaeohelotium, but not known which bacterium it is.
Maybe it could grow also on other Ascomycota.
I find it very exciting that the color changes.
best regards,
Thorben
Regards, Pimpek