23-06-2025 04:03
Francois Guay
Hi, I found this tiny sulfur yellow asco growing o
22-06-2025 13:52
DirkW
Dear friends,anyone out there with this paper?:DOU
26-05-2025 18:09
Henk RemijnGood day,In a burned forest near Hulst on the bord
20-06-2025 08:33
Josep Torres
Hello.Small, blackish, mucronated surface grains s
19-06-2025 22:19
Björn NordénBig thanks in advance.
11-06-2025 16:26
Jason Karakehian
Hi everyone, I am looking for the following protol
18-06-2025 19:24
Bernard Declercq
Good evening,On Oenanthe aquatica we collected a
18-06-2025 16:24
Andgelo Mombert
Bonjour,Un minuscule stade imparfait, qui pousse s
Hello everybody,I found an ascomycete (0,1 mm) on arnica.
Spores (11-13) 11,72 x 3,88 (3-4,5) µm, with two bigger oildrops and many small ones on both ends.
Asci 48-50 x 9-11, IKI blue, paraphyses 3 µm.
Thanks
Regards
Maren
you made no mistake with 0.1 mm? And it was in the mountains? On the old stems?
No idea actually. I looked in my database for Asteraceae with such a spore size, no good result.
Something of the Naevioideae perhaps. Schizothyrioma has larger apos and is reported on Achillea.
Zotto
thank you for your opinion.
There is an artifical arnica meadow on the westcoast of Schleswig-Holstein, we accompanied the botanical sektion to this spot to look after ascomycetes on arnica. What we didn't knew was that the meadow is mowed regularly and the clippings are removed. So we searched for arnica-stems. The botanist I talked to identified my stem as arnica, but it is not impossible that he was wrong.
On the same stem I found Cyathicula tomentosa, Mollisia cf. revincta (still without spores :( and Leptospora rubella.
The apos are really very small, max up to 0,15 mm.
I checked with the Naevioideae? on your DVD, the color and the macroscopical habitus matches Ploettnera solidaginis, but the microscopical details of course not.
The spores get one septa with age.
I think it could be a Diplonaevia sp. but which one?
Regards Maren
Arnica is not in the list of substrates in Hein 1976.
Zotto