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Ethan CrensonHi all, I am at a foray in central New York stat
23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
16-09-2025 12:53
Philippe PELLICIERPézizes de 1-4 mm, brun grisâtres, sur les capsu
22-09-2025 09:14
ruiz JoseHola, me pasan este asco en cáscara de nuez. Esp
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Jorge HernanzEstoy buscando y no encuentro el siguiente artÃcu
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Philippe PELLICIERSur branche morte de Mélèze. Les ascospores sphÃ
Pyrenomycet on Corylus avellana.
Per Marstad,
18-12-2017 10:41
Hello.I would like a name on this.
Spores 15x6 my.
Asci 150x7
Greetings, Per
Gernot Friebes,
18-12-2017 10:53
Re : Pyrenomycet on Corylus avellana.
Hi, Per,
it looks like a Hypoxylon, e.g. H. fuscum, which is very common on Corylus. If you can, please put a piece of the stroma in a drop of KOH and observe the KOH-extractable pigments. For further infos also see here: http://pyrenomycetes.free.fr/hypoxylon/html/Hypoxylon_fuscum.htm
Best wishes,
Gernot
Jacques Fournier,
18-12-2017 15:31
Re : Pyrenomycet on Corylus avellana.
I agree with Gernot, it might be H. fuscum but the spores you show have a conical cellular appendage at base, which is unknown in Hypoxylon.Make sure they come from the stromata you show on pics 1-2.
Ascospores of H. fuscum are also distinctive in having a sigmoid, not straight germ slit, please take photos at higher magnification to illustrate this.
Jacques
Ascospores of H. fuscum are also distinctive in having a sigmoid, not straight germ slit, please take photos at higher magnification to illustrate this.
Jacques
Per Marstad,
18-12-2017 16:11
Re : Pyrenomycet on Corylus avellana.
The spores came from my pictures 1 and2.
I know H. fuscum well, but this has another shape.
Thank you both for help.
Per.
I know H. fuscum well, but this has another shape.
Thank you both for help.
Per.