07-12-2015 14:17
Zugna Marino
Buon giorno a tutti, ad un primo momento, non ess
29-01-2026 10:04
Jean-Paul Priou
Bonjour à tous, Marcel LECOMTE président de L'A
21-01-2026 16:32
Gernot FriebesHi,I need your help with some black dots on a lich
26-01-2026 11:49
Margot en Geert VullingsWe found this possible anamorph on a dead Cytisus
25-01-2026 23:23
Tomaz Vucko
Hello! I found this species that resembles Delitsc
18-01-2026 12:24
Josep Torres
Hello.An anamorph located on the surface of a thin
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.