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29-04-2016 00:58

Nick Aplin

Salut à tous, Hopefully there is someone here th

28-04-2016 19:37

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonsoir.Un collègue m'a transmis une belle récol

29-04-2016 16:00

UZUN Yasin UZUN Yasin

On sandy soil near the stream..Ascospores eliptic

30-04-2016 01:38

Nick Aplin

Salut Ascofrance, I wonder if anyone has any idea

28-04-2016 22:22

Lothar Krieglsteiner Lothar Krieglsteiner

I found only one ascoma - on February, the 27th. F

29-04-2016 17:27

Enrique Rubio Enrique Rubio

Hi to everybody I'm looking for this paper Lundqv

27-04-2016 08:24

Dragiša Savic

I found it last year (april) on dead stem of Laser

16-04-2016 15:02

Luc Bailly Luc Bailly

Bonjour à tous, Hi all,Pour terminer un article,

25-04-2016 18:30

Chris Yeates Chris Yeates

Bonjour tousAesculus hippocastanum (certainly in t

26-04-2016 18:34

Dragiša Savic

I need a description of Pirottaea imbricata. Does

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Helotiale on Platanus leaves
Nick Aplin, 29-04-2016 00:58
Salut à tous,

Hopefully there is someone here that can help me with this inconspicuous species I collected on the underside of Platanus x hispanica leaves on 24/4/2016:

Apothecia up to 0.4mm, smooth to densely hairy


51.128851°N, -0.152131°W 70 metres above sea level


Ascospores 8.1-10.5 x 2.9-4 µm, smooth, hyaline, aseptate, with few small droplets

Asci with croziers, IKI light blue, possibly with Hymenoscypus type ring (?)

Paraphyses with single elongated, +/- refractive vacuole

Hairs when present clavate, smooth, up to 3-septate, end cell with single vacoule.

I have no idea where this species belongs, so any hints whatsoever would be much appreciated!


Amitiés,
Nick

  • message #42338
  • message #42338
Stip Helleman, 29-04-2016 01:39
Stip Helleman
Re : Helotiale on Platanus leaves
Hi Nick,
the apical ring looks more Sclerotinaceous to me but about the genus I have currently no idea.

cheers,
Stip
Hans-Otto Baral, 29-04-2016 07:44
Hans-Otto Baral
Re : Helotiale on Platanus leaves
Hi Nich & Stip
this looks indeed a bit sclerotiniaceous, mainly the basal amyloid protrusion. Could you please characterise the excipulum? Possibly the fungus is related to Moellerodiscus, though being very small and apparently sessile.
Zotto
Nick Aplin, 30-04-2016 00:52
Re : Helotiale on Platanus leaves
Hi Zotto & Stip,

Thanks for the advice. I had briefly considered Sclerotiniaceae but ended up getting nowhere.

I must admit I haven't grasped the terminology to describe the excipulum, so I'm hoping the picture helps....If not, I can try some more sectioning but I fear I'll end up with less than ten fingers :)

You can see the outside of the apothecium is a rosy-brown colour and which darkens lower down. The point of attachment is black.

Cheers,
Nick
  • message #42355
Hans-Otto Baral, 30-04-2016 08:15
Hans-Otto Baral
Re : Helotiale on Platanus leaves
This is fine! I think the isodiametric cell shape at the flanks and the colour of the cell walls would not contradict my idea of a Moellerodiscus. But that genus is really difficult and badly studied.

I see there was a similar case of sessile ?Moellerodiscus growing on a twig of Ligustrum which I could study only in the dead state.
  • message #42357
Lothar Krieglsteiner, 30-04-2016 23:19
Lothar Krieglsteiner
Re : Helotiale on Platanus leaves

Hi Zotto,


ah - I remember this. I think it grew together with Tympanis ligustri there.


Regards from Lothar