Accès membres

Mot de passe perdu? S'inscrire

30-04-2024 16:22

François Bartholomeeusen

Dear forum members,On April 25 2024, I found one f

03-05-2024 18:04

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde on Rubus fr

02-05-2024 20:04

éric ROMERO éric ROMERO

Bonjour, Une question à propos de la réaction a

01-05-2024 23:22

Ethan Crenson

Hi all, Found late last week in a New York City p

29-04-2024 21:32

Robin Isaksson Robin Isaksson

Hi! Found in Sweden. Ascomata with haris, se

01-05-2024 12:54

F. JAVIER BALDA JAUREGUI

Hello, everyone.An idea for this pyreno, I found u

30-04-2024 16:59

Sylvie Le Goff

Bonjour. Petite pézize récoltée au sol en bordu

30-04-2024 19:43

Gernot Friebes

Hi!We observed this hyphomycete growing between le

30-04-2024 16:08

maurice pelissier maurice pelissier

BonjourTrouvé dans un torrent de montagne au Chir

29-04-2024 21:51

Mathias Hass Mathias Hass

Hi everyone, Found on attached branches of top pa

« < 1 2 3 4 5 > »
Mollisia
Joop van der Lee, 23-11-2014 21:18
Joop van der Lee

Found on a little peace of wood.
Disk: grey/blue layer with cream coloured edges; when top layer is removed the inside is white.
Asco: 8-spored; biseriate in rows of two; 54-62x4-5 um.
Spores: elliptical; 7.5-10.5x2.0-3.0 um
Paraphyses have a slightly rounded top.


The last photo is a little too much on the green side

  • message #32283
  • message #32283
  • message #32283
  • message #32283
  • message #32283
  • message #32283
  • message #32283
Andreas Gminder, 23-11-2014 21:22
Andreas Gminder
Re : unknown asco

Hello,


this is a Mollisia species.


No chance to say anything more, many details are lacking.


 


best regards,


Andreas

Joop van der Lee, 23-11-2014 21:26
Joop van der Lee
Re : unknown asco
What more do you need Andreas?
Andreas Gminder, 23-11-2014 21:37
Andreas Gminder
Re : unknown asco

Hello Joop,


 


when I looked at the posting, the last four pictures weren't there ....


But nevertheless, at least the KOH reaction is important, though I believe that it should be negative here. In that case you will end up with Mollisia cinerea s.l., which still is an aggregation of very similar species were I have not the total clue for separating the different taxa.


You can do the KOH reaction macroscopically by putting a fragment of the hymenium in a drop of KOH 20% on a slide which is lying on a white sheet of paper. You then can see a yellow sap yielding from the fragment (KOH positive) - or no change of colour (KOH negative).


You can also do that microscopically by preparing a small piece of the hymenoum in a water mount and then adding KOH at the side of the cover slip. You can watch through the microscope when the KOH reached your piece of hymenium: The vacuolar bodies in the paraphyses will be dissolved rapidly by the KOH reaching these paraphyses. The dissolving will either result in a yellow colouration (positive) or the mount will stay completely colourless (negative).


 


best regards,


Andreas

Joop van der Lee, 23-11-2014 21:43
Joop van der Lee
Re : unknown asco
Ok, I will check that Rafael. I will let you know the results.
Joop van der Lee, 23-11-2014 22:19
Joop van der Lee
Re : unknown asco
KOH negative Rafael