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Mot de passe perdu? S'inscrire

18-03-2019 23:10

Patrice TANCHAUD

Bonsoir, récolte réalisée sous pins (seul coni

19-03-2019 17:12

Per Marstad Per Marstad

We have found this to day, on Betula pubescens.Ca.

18-03-2019 19:41

Per Marstad Per Marstad

We have found this to-day, in Norway, ca. 1 mm in

18-03-2019 21:48

Ethan Crenson

Hello again,On the same branch as my previous post

17-03-2019 22:26

Ethan Crenson

Found yesterday in New York City.  Substrate is a

18-03-2019 12:06

Enrique Rubio Enrique Rubio

Hi to everybodyThese minute, white, sessile, pruin

18-03-2019 11:32

Peter Püwert Peter Püwert

Hi all, here I find no solution. Apos max. 1 x o,

11-03-2019 14:02

Elisabeth Stöckli

 Bonjour, Récolté sur branche morte de lierre

17-03-2019 21:38

Ethan Crenson

Hello all, In New York City yesterday I came acro

17-03-2019 10:12

Pintos Angel Pintos Angel

Good morning,  has anybody information about Nect

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Stictis friabilis ?
Patrice TANCHAUD, 18-02-2019 19:45
Bonjour

récolte sur épicéa, spores 62-83 x 3-3,6 µm.

Me semble conforme à Stictis friabilis.
Merci d'avance pour vos avis éventuels.

Patrice
Hans-Otto Baral, 18-02-2019 22:23
Hans-Otto Baral
Re : Stictis friabilis ?
Yes, this could be. Did you test IKI and KOH+IKI, the hymenium/asci must be entirely inamyloid.
Patrice TANCHAUD, 19-02-2019 09:14
Re : Stictis friabilis ?
Thanks Zotto. Here is a photo.
  • message #56377
Hans-Otto Baral, 19-02-2019 10:10
Hans-Otto Baral
Re : Stictis friabilis ?
Oh this speaks against friabilis. But it cannot be that a positive reaction in IKI turns negative after KOH. It looks as if you did not wash enough with water (KOH neutralizes iodine by forming KI).

Another possibility could be Karstenia idaei. I think this possible confusion could be ruled out by a section of the margin.
Patrice TANCHAUD, 19-02-2019 10:49
Re : Stictis friabilis ?
Perhaps better here ?

Thanks in advance.
Hans-Otto Baral, 19-02-2019 11:39
Hans-Otto Baral
Re : Stictis friabilis ?
So it is clearly amyloid! The margin needs to be a section, otherwise I am lost. But Stictis usually has crystals, Karstenia not.
Patrice TANCHAUD, 19-02-2019 12:12
Re : Stictis friabilis ?
Here, in your DVD, you note "no crystals".
  • message #56382
Hans-Otto Baral, 19-02-2019 12:16
Hans-Otto Baral
Re : Stictis friabilis ?
Yes, this may be so. But I found S. friabilis completely inamyloid, with or without KOH.
Patrice TANCHAUD, 19-02-2019 12:46
Re : Stictis friabilis ?
Here, good KOH and very good IKI, and a good preparer ...
  • message #56385
Patrice TANCHAUD, 20-02-2019 08:55
Re : Stictis friabilis ?

The blue color is probably due to IKI or melzer and looks like what I got.

It's not easy to find the differences for an amateur between S. friabilis et K. idaei ...
Hans-Otto Baral, 20-02-2019 09:21
Hans-Otto Baral
Re : Stictis friabilis ?
Perhaps a closeup macro would help?  I was thinking that there is some macroscopical difference between the two genera.

Karstenia is now in Odontotremataceae and Stictis in Stictidaceae (when you look in my folders).

I would perhaps see clear with a median section of the margin, I know it is not easy but possible (with a razor blade).
Patrice TANCHAUD, 20-02-2019 11:14
Re : Stictis friabilis ?
Photo x 5 sous le microscope.
Hans-Otto Baral, 20-02-2019 11:16
Hans-Otto Baral
Re : Stictis friabilis ?
Yes, I think this looks more like a Karstenia. K. idaei has finally up to 15 septa as I remember.
Patrice TANCHAUD, 20-02-2019 12:01
Re : Stictis friabilis ?
Spores in melzer.
  • message #56414
Hans-Otto Baral, 20-02-2019 12:42
Hans-Otto Baral
Re : Stictis friabilis ?
C'est si bon :-)

We come to an end I feel.  Sherwood does not mention the number of speta, but figures 8-12. She says J- for the paraphyses and nothing for the asci. Since she used MLZ and does not state whether she applied KOH, her data are uncertain. But given that my HB 7242c is correctly identified, I conclude that K. idaei is the much better solution.

Zotto
Patrice TANCHAUD, 20-02-2019 13:03
Re : Stictis friabilis ?
Thank you Zotto for all your explanations. I had not noticed the existence of K. idaei with similar spores and distinguishing them is not easy.