
06-05-2024 10:02
François BartholomeeusenGood morning,At the end of an excursion in De Zegg

05-05-2024 09:59
Gernot FriebesHello,I failed to identify this anamorph, which gr

19-04-2015 20:20
Hi again Could you help me with this paper? NANN

30-04-2024 16:22
François BartholomeeusenDear forum members,On April 25 2024, I found one f

03-05-2024 18:04

Hello, Found by Laurens van der Linde on Rubus fr

01-05-2024 23:22
Ethan CrensonHi all, Found late last week in a New York City p
Unknown perithecia on Osmunda!
François Bartholomeeusen,
06-05-2024 10:02
At the end of an excursion in De Zegge Nature Reserve on April 25, 2024, I randomly took some old Osmunda stems for research.
At home I was able to identify Urceolella aspera, but with other ascomata on those stems my determination failed.
Irregularly shaped black spots were located in the vicinity of U. aspera. After the stems were soaked in water, those spots burst open slit-shaped and the hymenium was visible.
Asci: 45 x 8 µm, clavate, probably bitunate, no croziers, IKI + blue
(Pseudo) Parafysen: 42 x 1.8 µm, curled at the top and sometimes branched;
Spore: (7.5) 8.1 - 10.5 (11.1) × (2.4) 2.6 - 3.3 (3.4) µm; Me = 9.3 × 2.9 µm; Qe = 3.2;
uninucleate, lacrymoid;
Textura peridium: globosa angularis.
Could the genus be Leptopeltis?
Any help is welcome,
Regards,
François