14-11-2025 16:26
Marian Jagers
Hello everyone, On dead wood of Cytisus scoparius
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Mick PeerdemanIn January i found these black markings on the dea
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Mick PeerdemanDear all,Last week i stumbled upon a leaf of ilex
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carl van den broeck
Dear guestIn Waardamme, Belgium, I found dozens of
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Andreas Millinger
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Bruno Coué
Bonjour,je sollicite votre avis pour la récote
unknown pyrenomycet 2
Gernot Friebes,
29-03-2009 15:18
here is my second pyrenomycet I found yesterday. It grew on a thin twig of a deciduous tree. Spores: 21-23 x 5,5-6,5 µm.
Best wishes,
Gernot Friebes
Gernot Friebes,
29-03-2009 15:19
Re:unknown pyrenomycet 2
perithecia
Gernot Friebes,
29-03-2009 15:24
Re:unknown pyrenomycet 2
spores
Jacques Fournier,
29-03-2009 15:35
Re:unknown pyrenomycet 2
Hi again,
the large allantoid spores could fit Eutypella dissepta (Diatrypaceae) but you need further data to support it.
Please make a vertical section to see how perithecia are arranged, and two slides: one in water or Congo red to see if asci are spindle-shaped and long stipitate, another in Melzer's reagent after pretreatment in 3% KOH to check the presence and reaction of apical ring.
More soon!
Jacques
the large allantoid spores could fit Eutypella dissepta (Diatrypaceae) but you need further data to support it.
Please make a vertical section to see how perithecia are arranged, and two slides: one in water or Congo red to see if asci are spindle-shaped and long stipitate, another in Melzer's reagent after pretreatment in 3% KOH to check the presence and reaction of apical ring.
More soon!
Jacques
Gernot Friebes,
29-03-2009 18:09
Re:unknown pyrenomycet 2
Hello Jacques,
thank you for your good tip. The asci are indeed long stipitate and don't have any reactions in Melzer's reagent.
At first a picture of the perithecia.
Best wishes,
Gernot
thank you for your good tip. The asci are indeed long stipitate and don't have any reactions in Melzer's reagent.
At first a picture of the perithecia.
Best wishes,
Gernot
Gernot Friebes,
29-03-2009 18:09
Re:unknown pyrenomycet 2
spores and asci
Jacques Fournier,
29-03-2009 18:22
Re:unknown pyrenomycet 2
in Eutypella dissepta the apical ring often does not react clearly with iodine. The configuration of the perithecia within the stroma fits E. dissepta. Moreover, the structure of the wood in cross section is much like that of Ulmus, the usual host of this fungus.
I think you can keep this name
Jacques
I think you can keep this name
Jacques