Accès membres

Mot de passe perdu? S'inscrire

20-05-2026 12:57

Ingo Ibelshäuser Ingo Ibelshäuser

Hello everybody, on decayed hardwood e.g. Quercus

20-05-2026 20:08

Andreas Millinger Andreas Millinger

Good evening,another quite distinctive find from M

20-05-2026 21:49

Margot en Geert Vullings

We found this Lachnum on Juncus stems mown last ye

20-05-2026 17:47

Margot en Geert Vullings

We found this Mollisia on dead Juncus stems mown l

20-05-2026 18:15

Moreno Miriam

Hello! I am working on my master's thesis on the d

22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

17-05-2026 22:09

éric ROMERO éric ROMERO

Bonjour tous, Je sollicite vos avis pour ce Molli

19-05-2026 19:47

Andreas Millinger Andreas Millinger

Hello dear community,found this species the second

19-05-2026 12:55

Hardware Tony Hardware Tony

After checking Gminder and Otto's library I cannot

19-05-2026 10:27

Patrice TANCHAUD

Bonjour, récolte récente sur terre retournée i

« < 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