Accès membres

Mot de passe perdu? S'inscrire

03-06-2026 19:45

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoonI'm completely baffled by this suppo

03-06-2026 21:37

Tony Cumberlidge

This is my second post so just starting to get use

03-06-2026 14:39

Thomas Flammer

Apothecia yellow, glassy-transparent, 80 - 120 ymS

02-05-2016 17:12

Gilles Corriol Gilles Corriol

Bonjour à tous,Suivant le conseil de Nicolas VV,

12-02-2013 01:36

Renée Lebeuf

Bonjour, J'aurais de nouveau besoin de votre aide

16-03-2014 13:39

Enrique Rubio Enrique Rubio

HI to all I'm looking for B. Hein's article on Wi

02-06-2026 14:33

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a PDF copy of the followin

03-06-2026 08:21

Yanick BOULANGER

BonjourRécolté le 17/05/2026Sur un chemin, terre

18-10-2022 00:12

Valencia Lopez Francisco Javier

Hola amigos/asRecientemente encontré esta colecci

02-06-2026 17:58

Louis DENY

Bonjour forum, Sur feuille de Populus tremula, en

« < 1 2 3 4 5 > »
Hyphodiscus or Cistella?
Uwe Lindemann, 14-11-2009 01:37
Uwe LindemannHello Forum,
I recently found a little discomycet which I can't determine.
Macroscopic features:
Apothecia gregarious, sessile; Disc 0,1-0,3 mm, young pale beige, old greyish and brownish with a greenish tint (see photos)
Microscopic features:
Asci arising from croziers, 8spored, 45-55 x 6-7 µm, mostly biserate, IKI- and MLZ- !
Spores ellipsoid, hyaline, aseptate, with two polar guttules and/or some small guttules, 6-7,3(9) x 2,7-3(3,5) µm
Paraphyses filiform, 2 µm wide, sometimes slightly thickened at the apex
Hairs hyaline, thin to thick walled, coarsely warted, up to 5 µm wide; in some areas of the excipulum they are yellowish caused by a yellowish "exudate" which covered the outside of the excipulum.
Ectale excipulum: textura prismatica, mostly getalinous
It grows on Rubus.
My first guess is Hyphodiscus hymeniophilus but the size of the spores and the substrate are not fitting well.
What do you think about it? I would be very happy if you can help me!
Best Uwe
  • message #9536
Uwe Lindemann, 14-11-2009 01:38
Uwe Lindemann
Re:Hyphodiscus or Cistella?
Makro2
  • message #9537
Uwe Lindemann, 14-11-2009 01:38
Uwe Lindemann
Re:Hyphodiscus or Cistella?
Mikro
  • message #9538
Hans-Otto Baral, 14-11-2009 10:05
Hans-Otto Baral
Re:Hyphodiscus or Cistella?
Hi Uwe

this is 100% a Hyphodiscus, because of brownish colour and yellow exudate (which is onoly inconsistently present in Hyphodiscus but never in Cistella). The strongly gelatinized excipulum is also typica.

I would also say H. hymeniophilus, spore size , shape and gutules would fit quite well. But if you are right that the asci are inamyloid (in Lugol) then this would be the first time. I suggest you try pretretment with KOH and then test IKI or MLZ again. Hyphodisci are often hemiamyloid, so a clear blue is only obtained after KOH, and the IKI-red reaction sometimes overlooked.

My only collection with sch elongate spores and inamyloid asci was on Alnus viridis. Regrettably it was in bad shape, so I had no free spores:

H. cf. hymeniophilus. Asci IKI-/K+IKI-. Sp. *5-6(-8) x 2-2.2 µm, Ölm.1: 2-3 minute LBs in each end.

Was it Rubus idaeus or fruticosus-group?

Zotto
  • message #9539
Uwe Lindemann, 14-11-2009 11:02
Uwe Lindemann
Re:Hyphodiscus or Cistella?
Hi Zotto,
yes, the porus is hemiamyloid! After the pretreatment with KOH I can see the IKI-reaction (blue) very well. Thank you for your help!
An the substrate is of the rubus fruticosus-group (Brombeere).
All my best,
Uwe