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23-05-2026 11:44

Charles Grapinet Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:44

François Bartholomeeusen

Hi forum members,During an excursion organised by

25-05-2026 16:35

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

22-05-2026 13:29

Gernot Friebes

Hi,I am curious to hear your opinion on this mater

23-05-2026 18:57

Sylvie Le Goff

Bonjour à tousRécolté sur une branchette de Sal

23-05-2026 23:53

Moreno Miriam

Bonjour ! Je travaille sur mon mémoire de master

22-05-2026 14:44

Lothar Krieglsteiner Lothar Krieglsteiner

in unripe condition citrine yellow, then soon fadi

22-05-2026 21:35

Steve Clements

Bonjour, I expected this find on old wood on our

22-05-2026 18:12

Lothar Krieglsteiner Lothar Krieglsteiner

... in moist chamber from Portugal.As the fungus s

22-05-2026 20:08

Ethan Crenson

Hello all,  Yesterday in NYC I was visiting an e

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Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony, 12-04-2026 17:56
Hardware TonyFound on dead stems in February earlier this year and following regrowth confirmed this substrate. Seeking help identify at least for the genus as at a loss where this belongs, spores shape probably important but apprecaite any help.

Substrate: Nepteta cataria (Catmint) dead lower stem.
Ascocarps: Superficial, gregarious, subglobose, 0.1mm rounded black. No obvious ostiole. Surface roughened.
Asci: Clavate, fairly thin-walled, up to 89 – 93 x 9.7 – 10.3 µm, IKI -, 8-spored, uniseriate spores, croziers not obvious and appears negative.
Ascospores: Ellipsoid-fusoid, 1 – 3 septate, 1-2 inside ascus, 3 – matured, turning into one side flattened slightly, with 2-5 fairly large random oil drops, thin walled, no constriction, hyaline 17.0 – 21.5 x 6.0 – 8.0 µm
Excipulum: Textura angularis, hymenium bluing reaction in water.

With many thanks Tony Hardware
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Hardware Tony, 14-04-2026 00:10
Hardware Tony
Re : Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Due to the bluing perithecia in transmitted light it all seems to fit Gibberella pulicaris. Thanks to those that took the time to consider.  Tony
Mathias Hass, 19-04-2026 00:26
Mathias Hass
Re : Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hi,

The current name of Gibberella pulicaris (s.str.) is Fusarium sambucinum. However determinetion of Gibberella/Fusarium species is not simple. There are multiple taxa with very similar morphology, see for example:


http://www.ascofrance.com/uploads/forum_file/GIBBERELA-Samuels-G.-J.-H.-I.-Nirenberg-and-K.-A.-Seifert-0001.pdf


Maybe helpful, maybe not.


cheers Mathias

Hardware Tony, 19-04-2026 20:48
Hardware Tony
Re : Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Thank you Mathias, any further description and keys is always helpful. I became aware of the change in name when entering the record and also noted that G. cyanogena (maybe British issue only) has now been lumped together with G. pulicaris, now Fusarium sambucinum as you stated. I closely checked the keys and am still reasonably happy with F. sambucinum as most other species generally have much smaller width spores, very much larger spores generally or have specific substrates. I didn't observe conidia nor tried to culture but something I might consider in future if species are accepted through culture results. Thank you once again for your interest.  Tony.