02-12-2025 18:59
Malcolm Greaves
This pair of ascos 2.5cm across were on recently b
02-12-2025 19:25
Buckwheat PeteHello, can anyone identify this hairy fungus growi
30-11-2025 12:53
Edvin Johannesen
White short-stipitate apothecia found on thin twig
30-11-2025 10:47
William Slosse
I recently found a collection of small Peziza sp.
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Thomas Læssøehttps://svampe.databasen.org/observations/10496727
27-11-2025 11:46
Thomas Læssøehttps://svampe.databasen.org/observations/10493918
17-09-2025 10:50
Heather MerryleesHi there!I am hoping for any advice on the identif
29-11-2025 08:40
Andreas Millinger
Hello,on a splintered part of a branch on the grou
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