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16-07-2024 18:32
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Bonsoir, Un discomycète sur Liochlaena lanceolat
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17-07-2024 16:29
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Hello,A colleague found an unknown fungus on the s
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11-01-2022 16:36
Hi does anyone have a digital copy of Raitviir A (
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24-08-2020 13:00
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Dear friends.Looking for a copy of the following w
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11-07-2024 14:29
![Viktorie Halasu](/uploads/user_vgn/Halasu-0001.jpg)
Hello, a thin-fleshed Mollisia on a monocot stem
Erysiphe prunastri on algal crust on Prunus spinosa
Di Napier,
14-11-2023 14:16
While looking at lichens on a twig under a dissecting microscope, I noticed what looked like 100 um perithecia (some spherical, others apparently deflated into tiny black buttons) apparently growing on an algal crust on a Prunus spinosa twig. I now see they are called chasmo- or cleistothecia.
They look very similar to Erysiphe species (rather similar to E flexuosa on Aesculus? Update: similar, but not as wavy), with c. 100 um appendages about 6 um wide, with hooked tips.
There are several asci per cleistothecium, each with what looks like at least 8 ascospores. The asci are c 55 x 40 um. The spores are 15.5-17.9 x 9.9-11.3 um (5 spores measured).
Warwickshire, UK Thanks for any information.
Georges Greiff,
01-01-2024 13:59
Re : Erysiphe prunastri on algal crust on Prunus spinosa
Hi Di,
It does not answer your question per se but I find these fungi from time to time on bryophytes. It seems that mature fruitbodies fall from vascular plants, as they are not connected to other things via mycelium. I guess the blow around like a tumbleweed and disperse spores further away if the ascomata can act as propagules themselves. The hairs may allow them to get hooked onto vectors. Not sure, just a theory based on my own observations and thoughts.
All the best,
George
It does not answer your question per se but I find these fungi from time to time on bryophytes. It seems that mature fruitbodies fall from vascular plants, as they are not connected to other things via mycelium. I guess the blow around like a tumbleweed and disperse spores further away if the ascomata can act as propagules themselves. The hairs may allow them to get hooked onto vectors. Not sure, just a theory based on my own observations and thoughts.
All the best,
George