04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
04-11-2025 12:43
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
28-10-2025 15:37
Carl FarmerI'd be grateful for any suggestions for this strik
03-11-2025 16:30
Hans-Otto Baral
Hello I want to ask you if you have found this ye
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