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16-08-2015 10:56

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Pongo unas fotos de una Peziza que

12-08-2015 21:57

Lepista Zacarias

Dear all,Can you help in identifying this ascomyce

15-08-2015 16:14

Blasco Rafael Blasco Rafael

Hola, he visto esta Sporormiella sobre excremento

15-08-2015 17:23

Blasco Rafael Blasco Rafael

Hola, tengo esta muestra y no se por donde mirar,

14-08-2015 00:43

Malcolm  Greaves Malcolm Greaves

We have had a lot of dry weather lately and a log

12-08-2015 13:48

Blasco Rafael Blasco Rafael

Hola, tengo esta muestra desde hace un mes en casa

14-08-2015 10:09

Castillo Joseba Castillo Joseba

de pequeño tamañoNo se por donde comenzarJoseba

14-08-2015 01:00

Claude Kaufholtz-Couture Claude Kaufholtz-Couture

Bonjour ! Je viens d'étudier Pulvinula carbonari

14-08-2015 10:13

Castillo Joseba Castillo Joseba

estas pequeñas setas,   a  las que no he apreci

22-08-2014 18:01

Bernard Declercq Bernard Declercq

Hallo to everybody,Does anyone have following docu

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Rutstroemia from a Bosnian mountain
Nihad Omerovic, 28-09-2023 22:11
Hello,
Looking for opinions on this Rutstroemia; I considered R. alnobetulae - spore size, shape and content match, but there's no IKI blue reaction with paraphyses.

Date: 10. 09. 2023.
Habitat/substratum: peat bog fragment around a mountain stream, 1800 m elevation, with Alnus, Salix, Pinus mugo, on a dead twig, possibly from Alnus glutinosa.

Spore size: Me = 26.5 × 6.2 µm ; Qe = 4.3 (some over 28 µm)
Asci: around 170 µm, croziers +

Could not make proper section - ascoma was gelatinous and then kind of squishy.

Last picture is twig section.
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Nihad Omerovic, 28-09-2023 22:13
Re : Rutstroemia from a Bosnian mountain
Macro
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Nihad Omerovic, 28-09-2023 22:20
Re : Rutstroemia from a Bosnian mountain
spores
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Nihad Omerovic, 28-09-2023 22:22
Re : Rutstroemia from a Bosnian mountain
paraphyses, ascus tip IKI
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Nihad Omerovic, 28-09-2023 22:23
Re : Rutstroemia from a Bosnian mountain
sections
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Hans-Otto Baral, 29-09-2023 09:50
Hans-Otto Baral
Re : Rutstroemia from a Bosnian mountain
Alnus is the only possible genus among the three trees you mentioned. You can verify it by a radial section by looking for the ladder-like perforations.

Spores etc. fit that species. I am not sure how constant this reaction of the VBs is. The VBs look correct. Also I am not sure if this reaction works on herbarium material.
Nihad Omerovic, 29-09-2023 23:27
Re : Rutstroemia from a Bosnian mountain
Thank you.

Radial section:


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Hans-Otto Baral, 30-09-2023 20:33
Hans-Otto Baral
Re : Rutstroemia from a Bosnian mountain
Sorry I failed to say that you must hit the vessels. The rows of larger cells in your cross section show such ladders in radial section. Vessels are often very abundant but here they are more scattered. Bad luck!
Nihad Omerovic, 01-10-2023 19:08
Re : Rutstroemia from a Bosnian mountain
Thank you for the explanation.
I made several cuts/photos but posted only these two.
Could this be the "ladder"?
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Hans-Otto Baral, 01-10-2023 20:36
Hans-Otto Baral
Re : Rutstroemia from a Bosnian mountain
Yes it is, very good. So it is clearly a Betulaceae and only Betula comes in consideration besides Alnus.