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14-06-2025 13:28

titre : Hypoxylon sur populus
Richard VALERI Richard VALERI

Bonjour à tous.Trouvé au sol, longuement résupi

13-06-2025 16:34

Strossmayeria-like on Fagus
Andgelo Mombert Andgelo Mombert

Bonjour,Un petit discomycète qui me résiste. Il

13-06-2025 19:57

Helvella
Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y avellanosEjemplar uni

12-06-2025 19:36

Lachnum sp. on Larix sp. cones
Rodríguez Borja Rodríguez Borja

Hi, I have got this collection hoping you can giv

13-06-2025 09:41

Aquatic ascomycete.
Josep Torres Josep Torres

Hello.A cerebriform ascomycete sprouting scattered

12-06-2025 15:53

Arthoniales? Saccothecium-like
Viktorie Halasu Viktorie Halasu

Hello, I keep finding something with spores like

12-06-2025 08:58

Help with some synnemata.
Josep Torres Josep Torres

Hello.Some synnemata sprouting in a scattered but

12-06-2025 19:26

Bryoscyphus conocephali
Charles Aron Charles Aron

Hi All, Recently I found this minute Bryoscyphus

12-06-2025 13:04

literature request
Angel Pintos Angel Pintos

Hi, does anyone have the following article: Tibel

11-06-2025 13:44

Ciboria sur feuille d'Alnus alnobetula
Nicolas Suberbielle Nicolas Suberbielle

Bonjour,J'ai trouvé cette espèce aux alentours d

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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.