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15-12-2025 15:54

Johan Boonefaes Johan Boonefaes

Unknown anamorph found on the ground in coastal sa

15-12-2025 15:48

Danny Newman Danny Newman

Melanospora cf. lagenaria on old, rotting, fallen

15-12-2025 07:05

Danny Newman Danny Newman

Pseudosclerococcum golindoi (det: Zotto)near Cosb

15-12-2025 11:49

Danny Newman Danny Newman

ITS sequences from the following two collections B

15-12-2025 07:09

Danny Newman Danny Newman

indet. Rutstroemiaceae sp. on unk. fallen leavesMc

15-12-2025 12:34

Danny Newman Danny Newman

indet. Rhytismataceae on oak leafnear Purchase Roa

09-12-2025 12:06

Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche l'article concernant Hypobryo

13-12-2025 17:26

Buckwheat Pete

Hello everyone,I have a rather interesting ascomyc

13-12-2025 11:58

Mirek Gryc

HiSupposedly this is a species that occurs quite o

12-12-2025 18:39

Mirek Gryc

Hello everyone.Macrofeatures similar to Mollisia b

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Unknown asco on Cirsium sp.
Maren Kamke, 02-06-2015 05:57
Maren KamkeHi 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
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Hans-Otto Baral, 02-06-2015 09:08
Hans-Otto Baral
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
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Maren Kamke, 02-06-2015 17:54
Maren Kamke
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
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Hans-Otto Baral, 02-06-2015 18:24
Hans-Otto Baral
Re : Unknown asco on Cirsium sp.
yeah, looks exactly as it should :-)