02-10-2025 09:16
Josep Torres
Hello.Some tiny apothecia sprouting in a scattered
01-10-2025 20:16
Zuzana Sochorová (Egertová)
Hello,I would appreciate your opinion on this yell
01-10-2025 19:47
Philippe PELLICIERUn parasite sur les feuilles de graminées qui for
30-09-2025 22:08
Philippe PELLICIERBonjour, cette Otidea de petite taille de 1-2 cm c
29-09-2025 10:59
Jean-Luc RangerBonjour, Je ne sais trop où chercher ce champi
28-09-2025 12:30
Zuzana Sochorová (Egertová)
Hello, this fungus nicely fits Lasiosphaeris hirsu
26-09-2025 23:41
Lieve Deceuninck
Bonjour members du forum. Merci d'avance pour tout
Asco on Heracleum
Nick Aplin,
29-01-2013 22:25
I have been struggling with this little ascomycete found last week on dead Heracleum stems just above snow-level in the South of England:
Apothecia sessile to subsessile, to 0.3mm. Yellowing with age
Spores 12 - 15.1 x 4.5 - 6.1 µm mainly 1-septate in the asci, finally 2-septate at maturity
Asci tips with no reaction to iodine
Croziers present
Thank you for your ideas,
Nick
Hans-Otto Baral,
29-01-2013 23:05
Re : Asco on Heracleum
The colour looks greenish on my screen,but is it perhaps whitish in reality? It is not sure that the spores are 1-septate at maturity, I suspect they are ejected aseptate, because the ascus with septate spores has a strong apical thickeing, so this ascus is surely dead.
The excipulum sketsch shows flanks and margin? Does not look like Parorbiliopsis. No idea.
Zotto
The excipulum sketsch shows flanks and margin? Does not look like Parorbiliopsis. No idea.
Zotto
Nick Aplin,
30-01-2013 01:30
Re : Asco on Heracleum
Hi Zotto,
Thanks for your thoughts.
Yes the apothecia were whitish.
Thats interesting - It makes sense that some of the asci were dead - I kept the fungus alive for a couple of days before illustrating it.
I saw very few (none?) aseptate spores outside of the asci unless I squashed the preparation under the coverslip.
It reminded me of images I have seen of Allophyllaria, but that can't be correct with a negative iodine reaction, right?
Nick
Thanks for your thoughts.
Yes the apothecia were whitish.
Thats interesting - It makes sense that some of the asci were dead - I kept the fungus alive for a couple of days before illustrating it.
I saw very few (none?) aseptate spores outside of the asci unless I squashed the preparation under the coverslip.
It reminded me of images I have seen of Allophyllaria, but that can't be correct with a negative iodine reaction, right?
Nick
Hans-Otto Baral,
30-01-2013 08:12
Re : Asco on Heracleum
Allophylaria has a thick-walled excipulum (+/- oblita), of elongat cells. Yours seem thin-walled and +/- isodiametric.
But Allophylaria is usually deep red (hemiamyloid), thoughrarely inamyoid.
But Allophylaria is usually deep red (hemiamyloid), thoughrarely inamyoid.