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18-09-2025 08:35

Chaetomium
Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

17-09-2025 19:43

Lachnellula suecica ?
Philippe PELLICIER

Sur branche morte de Mélèze. Les ascospores sphÃ

18-09-2025 19:40

Pulvinula sp
Sylvie Le Goff

BonjourPensez vous que le genre Pulvinula puisse c

18-09-2025 16:14

Literature request
Bernard Declercq Bernard Declercq

Hello,I am looking for a copy of following paper:H

17-09-2025 16:14

Sepultaria ?
Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Ascomycete on Polystichum proliferum
Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Marthamycetales revision published
Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

16-09-2025 12:53

Encoeliopsis rhododendri
Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

03-09-2025 12:44

Ascolichen on Blechnum?
Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Engler & Prantl, Nat. Pflanzenfam. (Ed. 2) 1938
Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a digital copy of the seco

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Rutstroemia-like, but not quite
Edvin Johannesen, 24-11-2021 22:28
Edvin Johannesen
Apothecia on twigs from a deciduous tree (Central Norway), 3-5 mm in diameter, short-stalked. Outside somewhat "scurfy", stalks short, pale, but darker towards the base. No sign of stromatised host tissue. Asci IKI+ (blue in Lugol), 110-120 x 12-13 mcr, spores 16-18 x 4-5 mcr, with two or three guttules plus some smaller. Paraphyses filiform, 1.5-2 mcr broad. Excipulum I guess is textura intricata. I was expecting Rutstroemia, but don't find a match. There doesn't seem to be any sign of dark lines in the host tissue.  Are there some kind of resin in the hymenium?

Photos of re-wetted material. All measures in water.

Suggestions appreciated. Thanks
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Peter Püwert, 24-11-2021 22:48
Peter Püwert
Re : Rutstroemia-like, but not quite
Hi, looks like Rutstroemia firma ?

Regards Peter.
Edvin Johannesen, 24-11-2021 23:10
Edvin Johannesen
Re : Rutstroemia-like, but not quite
That's what I thought initially. I checked images of the differet forms in Zotto's folder and I thought the spores were too narrow. No septa or budding seen, but that may because the spores aren't mature, I guess. This is collected in a spruce forest in Central Norway (but on deciduous wood), so Quercus and Fagus is out of the question. Betula or Salix most probable substrate.

Thanks.
Peter Püwert, 25-11-2021 00:42
Peter Püwert
Re : Rutstroemia-like, but not quite
Yes, probable immature. And there are also references in literature on Alnus, Betula and Corylus.

Regards Peter.