30-07-2025 18:06
Stefan JakobssonOn a decorticated twig of Alnus incana on moist so
30-07-2025 20:52
Bohan JiaHi together, I've been looking posts in AscoFra
30-07-2025 10:12
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
13-06-2025 09:41
Josep Torres
Hello.A cerebriform ascomycete sprouting scattered
13-06-2025 16:34
Andgelo Mombert
Bonjour,Un petit discomycète qui me résiste. Il
21-07-2025 19:22
Ethan CrensonHello all, Here is an Orbilia found by a friend
Rutstroemia-like, but not quite
Edvin Johannesen,
24-11-2021 22:28
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
Peter Püwert,
24-11-2021 22:48
Re : Rutstroemia-like, but not quite
Hi, looks like Rutstroemia firma ?
Regards Peter.
Edvin Johannesen,
24-11-2021 23:10
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
Re : Rutstroemia-like, but not quite
Yes, probable immature. And there are also references in literature on Alnus, Betula and Corylus.
Regards Peter.