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06-06-2010 00:11

Uwe Lindemann Uwe Lindemann

Hello Forum, I recently found an inoperculate dis

05-06-2010 10:06

Marja Pennanen

Hello, I found these on the remnants of leaves of

03-06-2010 03:55

Roland Labbé

Bonjour ! Voici une planche de Neobarya parasit

02-06-2010 00:15

M. M. Gotink

On hare dung in a moist container again... Apot

01-06-2010 20:55

Enrique Rubio Enrique Rubio

Hi to all. What's your opinion about this Thecoth

31-05-2010 23:24

Peter Welt Peter Welt

Who can help? Because a finding of a Delitschia on

31-05-2010 15:43

Renée Lebeuf

Bonjour à tous, Je sollicite votre aide pour

31-05-2010 15:42

Luc Bailly Luc Bailly

Ce n'est pas facile de trancher, parfois! :/ Qu

31-05-2010 09:15

Marja Pennanen

Hello folks, these clusters can be nearly 1 mm

30-05-2010 22:25

Luc Bailly Luc Bailly

J'en suis à la compilation de mes notes du stage

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difficult inoperculate Discomycete
Uwe Lindemann, 06-06-2010 00:11
Uwe LindemannHello Forum,
I recently found an inoperculate discomycete which I can’t determine. I think it’s similar to Psilocistella quercina but I am not sure.
Here are some data:

Apothecia up to 0,3 mm, whitish-brownish
on wet, rotten wood of a broadleaf tree, between Hyaloscypha albohyalina var. albohyalina (see the red markers)

Asci 8sp, with croziers, IKI+ b, 38-43 x 6-7,5 µm
Paraphyses filiform, not pointed, no content
Ascospores hyalin, with two guttules, 5-6 x 3 µm
Ec. Excipulum yellowish-brownisch T. intricata
Medulla yellowish-brownisch T. angularis
Hairs ("marginal cells") smooth, yellowish-brownisch, up to 45 µm

I hope that you can help me.
  • message #11799
Uwe Lindemann, 06-06-2010 00:12
Uwe Lindemann
Re:difficult inoperculate Discomycete
  • message #11800
Hans-Otto Baral, 06-06-2010 13:11
Hans-Otto Baral
Re:difficult inoperculate Discomycete
Hi Uwe

I need to see the hairs. Are they cylindrical, septate? Width?

What is the substrate?
Uwe Lindemann, 06-06-2010 13:25
Uwe Lindemann
Re:difficult inoperculate Discomycete
Hi Zotto,
sorry, I am not precise enough in my description. You can see the hairs on the micr photo left above. The hairs are cylindrical, septate, width 2,5-3 µm.
The substrate is, as I wrote above, very wet and rotten wood of a broadleaf tree, maybe Quercus.
Best, Uwe
Hans-Otto Baral, 06-06-2010 16:47
Hans-Otto Baral
Re:difficult inoperculate Discomycete
Hi Uwe

sorry for being so blind! Well, yes, the hairs are well visible. And the excliple is a brownish angularis (I think you mixed ectal and medullary). This both looks like a Pyrenopeziza. The spores remind me of our P. ulicis nom. prov., but there the spores get warted. Spore size fits well and a bit hairs are also present there (DVD: HB 6600, JPP 22105).

Uwe Lindemann, 06-06-2010 17:31
Uwe Lindemann
Re:difficult inoperculate Discomycete
Oh, yes, P. ulicis looks quite similar.
I don't see warts on the spores, but the warts are maybe too little to see it with my technical equipment.
Thank you again very much for your help!
Hans-Otto Baral, 06-06-2010 18:37
Hans-Otto Baral
Re:difficult inoperculate Discomycete
On your photo the spores look a bit warted. This might be due to not enough resolution, but I think they mean a rough surface. The warts in P. ulicis are not very prminent. Perhaps you can stain them with cresylblue? I think a normal microscope is able to resolve them :-) And if a photo shows them, then direct viewing should even more be possibe. The warts appear to exist only very late in development. I wrote: inside living asci they look +/- smooth.

Uwe Lindemann, 06-06-2010 22:02
Uwe Lindemann
Re:difficult inoperculate Discomycete
I think it is due to the bad resolution that you saw warts ;-) In higher resolution (see photo) the spores are almost smooth except (maybe) the marked areas.
Thanks a lot for your additional explanations!
  • message #11821
Hans-Otto Baral, 06-06-2010 22:35
Hans-Otto Baral
Re:difficult inoperculate Discomycete

can you give me an idea of the kind of forest. We had this P. ulicis only on Ulex, but in Spain it was found on Eucalyptus :-) by Javier Fernandez, also with nicely warted spores.

Uwe Lindemann, 06-06-2010 23:01
Uwe Lindemann
Re:difficult inoperculate Discomycete
The find is from a fieldtrip last thursday - with Klaus, Fredi and Dirk ;-) - to the NSG Davert near Münster. It's an mixed (overgrown) forest with different broadleaf trees like Acer, Salix, Alnus, Quercus, Carpinus, Fagus and Ulmus. The place where I found it:,7.595973&daddr=&hl=de&geocode=&mra=dme&mrcr=0&mrsp=0&sz=15&sll=51.853435,7.600608&sspn=0.011663,0.020728&ie=UTF8&ll=51.852408,7.59578&spn=0.002916,0.00927&t=h&z=17
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