18-08-2025 15:07
Lothar Krieglsteiner
.. 20.7.25, in subarctic habital. The liverwort i
02-02-2026 21:46
Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
02-02-2026 14:55
Andgelo Mombert
Bonjour,Sur thalle de Lobaria pulmonaria.Conidiome
02-02-2026 14:33
Andgelo Mombert
Bonjour,Sur le thalle de Peltigera praetextata, ne
31-01-2026 10:22
Michel Hairaud
Bonjour, Cette hypocreale parasite en nombre les
02-02-2026 09:29
Bernard CLESSE
Bonjour à toutes et tous,Pour cette récolte de 2
01-02-2026 19:29
Nicolas Suberbielle
Bonjour, Marie-Rose D'Angelo (Société Mycologiq
31-01-2026 09:17
Marc Detollenaere
Dear Forum,On decorticated wood of Castanea,I foun
29-08-2025 05:16
Francois Guay
I think I may have found the teleomorph of Dendros
on old bark of populus
Robin Isaksson,
03-02-2020 21:07
found this on old damage on populus tremula.does some one recognice it?
have hard to tell genus.
spores 17-20x 4-5 um
Asci is 8 spored, asci not react to lugols. 75- 90 long
Regards
Kosonen Timo,
03-02-2020 21:29
Re : on old bark of populus
Hello,
Could you give measures for the hairs? What about MLZ and CB reactions? Study carefully excipular cells and hairs for any staining small nodules (MLZ dark or CB+). Looks almost like having croziers, can you confirm? -"Psilocistella"... No more precise opinion at this moment.
Timo
Robin Isaksson,
03-02-2020 22:03
Re : on old bark of populus
hi Timo,
I would say it is croziers but ist actully very hard to tell for sure.
in melzer i couldent se any reaction but in cotton blue it was a yellowgrren rect in the bottom fo apotecium.
see foto, the hairs is 5 um wide and hard to tell but 60-80 um long
regards
I would say it is croziers but ist actully very hard to tell for sure.
in melzer i couldent se any reaction but in cotton blue it was a yellowgrren rect in the bottom fo apotecium.
see foto, the hairs is 5 um wide and hard to tell but 60-80 um long
regards
Kosonen Timo,
04-02-2020 07:44
Re : on old bark of populus
ok.
The green colour is most probably an artefact of the yellow pigment of the apo combining with blue.
I can only say "Psilocistella" with relatively big spores. The thin-walled, not-glassy multiseptate hairs with round apex is the uniting character in this group. but but... I am not saying these species make a nice (monophyletic) genus. It seems more complicated.
--btw. Did the apothecia (hymenia) turn reddish brown when mature/dry?
You can check Baral's folder for Psilocistella. And also Luis Quijada had recently an article on Psilocistellas (Quijada et al 2014. Is Psilocistella quercina (Velen.) Svr?ek a good taxon?). And as usual, the sequence material coverage for this part of Hyaloscyphaceae is intriguingly low.
Please carry on! :-)
Timo
Robin Isaksson,
04-02-2020 21:03
Re : on old bark of populus
Ok,
I have tryed Baral's folder and Quijada et al 2014. no clear fit. To big spores and big harris combined with Spore. Maybe i could send it for a sequencing ITS-region and put it in official hebraria if it will help in the future?
The apotecium is orange/ brown dry.
I have tryed Baral's folder and Quijada et al 2014. no clear fit. To big spores and big harris combined with Spore. Maybe i could send it for a sequencing ITS-region and put it in official hebraria if it will help in the future?
The apotecium is orange/ brown dry.
Kosonen Timo,
05-02-2020 06:22
Re : on old bark of populus
I'll be happy to check the sample. I'll send you email.
Timo