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24-06-2015 20:08

Carmel Sammut

Found under olive tree - on dead olive leaf (could

23-06-2015 21:32

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,this fungus was found in a tropical lowland

23-06-2015 13:52

Enrique Rubio Enrique Rubio

Hi to everybody On last spring my friend Mikel T

23-06-2015 13:04

Yatsiuk Iryna Yatsiuk Iryna

Hello! I collected this Trichopeziza(?) on dead s

23-06-2015 17:02

Vasileios Kaounas Vasileios Kaounas

Found in Abies cephalonica, 23-06-15. With Melzer,

22-06-2015 20:16

Bometon Javier Bometon Javier

Ascomas hasta 4mm, en un tronco de Salix, semiente

23-06-2015 09:04

Marja Pennanen

Hi,here's another mystery. These are about 0,2 mm

23-06-2015 08:50

Marja Pennanen

Hi,the summer finally started here.These change co

22-06-2015 17:16

Malcolm  Greaves Malcolm Greaves

This Scutellinia was found growing on a Picea cone

22-06-2015 14:06

Thorben Hülsewig

Hi there, before 3 weeks ago i found on a tribe (

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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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  • message #77010
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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  • message #77012
Nihad Omerovic, 28-09-2023 22:22
Re : Rutstroemia from a Bosnian mountain
paraphyses, ascus tip IKI
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  • message #77013
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.