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27-04-2026 20:52

Mollisia or related genus from Portugal - with quite peculiar character
Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Micropodia pteridina?
Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

another anamorph on monocotyleous remains from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

bright green minute anamorph on Citrus aurantius-twig from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

anamorph on monocotyleous leaves from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Spiral conidial crust
Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Microdiplodia henningsii
Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

Ramularia sp ?
William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

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Yellow discomycete
Per Vetlesen, 08-12-2015 11:37
Hei
I found this Ascomycete on a log of a dead hardwood tree (Acer platanoides?) in Stange, Norway.
Spores: 20.9 [25.6 ; 27.8] 32.5 x 5.7 [6.6 ; 7] 7.8 µm, Q = 2.9 [3.8 ; 4.2] 5 ; N = 29 ; C = 95%. Me = 26.7 x 6.8 µm ; Qe = 4
Asci: 107.9 [120.2 ; 128.4] 140.7 x 14.5 [15.4 ; 16.1] 17 µm. Q = 6.7 [7.6 ; 8.2] 9.1 ; N = 16 ; C = 95%. Me = 124.3 x 15.7 µm ; Qe = 7.9

Thanks in advance for help!


Regards


Per

  • message #39371
  • message #39371
Martin Bemmann, 08-12-2015 11:53
Martin Bemmann
Re : Yellow discomycete
Hei Per,

most probably Pezicula acericola. Try Lugol without KOH. I bet the apical apparatus will turn bright red (hemiamyloid).

Regards
Martin
Per Vetlesen, 08-12-2015 13:30
Re : Yellow discomycete
Hei Martin.

Yes, you are right, it became red (redder than in the photo). I have looked at data about P.acericola on Internet and it seems to fit very well with my disco. As far as I can see it is not recorded in Norway before!


Thank you very much!


Regard
Per

  • message #39374
Per Vetlesen, 13-12-2015 22:10
Re : Yellow discomycete
Hi Martin,
I have now checked it up with Gerard J. M. Verkley's work: A monograph of the genus Pezicula and its anamorphs, and the descriptions/comments by Irina Morozova/Stip Helleman: http://www.ascofrance.com/forum/17358/pezicula-acericola-aesculea-what-is-the-difference
Just to be sure I have re-measured the ascospores: L/W = 2.9 [4 ; 4.3] 5.4 ; N = 100. I found several bluntly hooked spores, and with the asci's length 120.2 - 128.4 µm and paraphyses' apical cell less than 4,5 µm in diameter, it fits very well with Pezicula aesculea.
Thank you for guiding me to the genus.

And thanks to Kåre Homble for helping me identifying it.

Regards
Per