31-03-2026 21:18
Miguel Ángel Ribes
Good evening. oes anyone have the original descrip
31-03-2026 20:57
Stefan BlaserHello everybody, I hope somebody can help me with
26-03-2026 15:31
Åke Widgren
Hello,I found this one in October last year, on r
31-03-2026 16:20
Mlcoch Patrik
Hello, Please about help with determination. On
31-03-2026 08:19
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
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William Slosse
Hello all,On 27/03/26, in Kraaiveld in Wingene (Be
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Yanick BOULANGERBonjourVoici des petites fructifications poilues s
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.