Unknown asco on Cirsium sp. - Forum ASCOFrance

09-02-2026 11:42

Lachnum sp.

Åge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

09-02-2026 14:46

Cistella granulosella of Hyphodiscus incrustatus?

Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

02-02-2026 21:46

Dark disc on Populus

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

07-02-2026 20:30

Azores and seven are described as new to science: Byssoloma fuscum, Lecania azorica, Sphaerellothecium heterodermiae, S. parmotremae, Stigmidium micareae, S. sub- cladoniicola, Thelocarpon microsporum.

Robin Isaksson

Hi!Anyone that have this one and can sen it to me?

25-01-2026 23:23

Delitschia/Lojkania? on wood

Tomaz Vucko

Hello! I found this species that resembles Delitsc

06-02-2026 01:14

Amniculicola

Tomaz Vucko

Hello!How would you name this species? Most perith

04-08-2014 17:35

Pachyella 1898

Leandro Sánchez

Sur branche de feuillus, jusqu'à 22 mm diamètre,

05-02-2026 15:07

Asco in Pinus halepensis

Vasileios Kaounas

Found on a fallen needle of Pinus halepensis, diam

05-02-2026 06:43

At first glance, a Nitschkia, but...

Stefan Blaser

Hello everybody, Any help on this one would be mu

18-08-2025 15:07

pyrenomycete on dead parts of foliose liverwort from Norway

Lothar Krieglsteiner

.. 20.7.25, in subarctic habital. The liverwort i

« < 1 2 3 4 5 > »

Unknown asco on Cirsium sp.

Maren Kamke, 02-06-2015 05:57

Hi everybody,
apothecia beneath the surface and breaking the bark, up to 1 mm diameter, hymenium light olive-yellow. Asci 89x10 µm, IKl stains the ascuswall in young asci blue. Spores 52-65 x 2,5-3 µm, 6-septate, difficult to see. Paraphyses septate up to 3µm wide, apikal slightly tapering.
Thank you for your help
Regards, Maren

Hans-Otto Baral, 02-06-2015 09:08

Re : Unknown asco on Cirsium sp.

Hi Maren

undoubtedly this is a Karstenia. To be sure, the periphysoids at the margin could be verified by a section, they must reach down to the base of the lateral hymenium.

The iodine reaction is red (hemiamyloid) for the entire asci. After KOH the hymenium reacts deep blue.

It looks to me to be K. macer. Here a marginal section, and the apos and spores of another collection (spores *47-62 x 2.3-2.5 µm).

Zotto

Maren Kamke, 02-06-2015 17:54

Re : Unknown asco on Cirsium sp.

Hi Zotto,
thank you very much. Karstenia macer, I think this is it. I attached two Asci-Images (IKI) with and without KOH-treatment.
Regards, Maren

Hans-Otto Baral, 02-06-2015 18:24

Re : Unknown asco on Cirsium sp.

yeah, looks exactly as it should :-)

Accès membres

Forum AscoFrance