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11-03-2026 17:36

Help for Genus and Species ID
Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

11-03-2026 16:48

Saccobolus minimoides ?
Bruno Coué Bruno Coué

Bonjour, je serais heureux d'avoir votre avis sur

11-03-2026 14:14

Scopinella on Dryas octopetala
Gernot Friebes

Hi,I would like to share a collection of Scopinell

15-09-2020 17:27

Thyridaria sp.
Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte décortiquée de Berbe

10-03-2026 18:08

Orange discs on Arctium
Marc Detollenaere Marc Detollenaere

Dear Forum,On stems of Arctium, I found some downy

05-03-2026 10:07

White apothecia on pine cone
Hulda Caroline Holte

Hello, I found and collected this species growing

07-03-2026 13:06

Phaeohelotium parasulphuratus ?
éric ROMERO éric ROMERO

Bonjour tous, Sur cône d'épicea fortement imbu,

23-12-2025 08:27

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

28-02-2026 11:05

Peziza
Yanick BOULANGER

Bonjour à tousLe 24/02/2026 à Montmacq, devant m

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Pyrenomycet on hardwood.
Per Marstad, 16-12-2017 14:18
Per MarstadI would like a name on this. 2 mm in diameter, dark brown, growing on dark brown mycel (subiculum). Spores 25-30 x 10 my. Asci 200x10.
  • message #51630
  • message #51630
Vizzini Alfredo, 16-12-2017 14:29
Re : Pyrenomycet on hardwood.
Hi,
Rosellinia?
Alf
Jacques Fournier, 16-12-2017 14:42
Jacques Fournier
Re : Pyrenomycet on hardwood.
Hi Per, if you want a name you need to be more explicit because there is more than one Rosellinia spp.
Is 2 mm the diameter of a single stroma?
What is the host?
dimensions and shape of the apical apparatus, in iodine
Do the spores have a germ slit? Lenght, location and shape are needed.
Do ascospores have cellular appendages and/or slimy caps? Is there a slimy sheath around ascospores?, to be checked in India ink.
With this information you should find a name in Petrini's papers, Sydowia 41 and 44, available on the internet.
Good luck,
Jacques
Per Marstad, 16-12-2017 22:10
Per Marstad
Re : Pyrenomycet on hardwood.
I have found Rosellinia aquila in British Ascomycetes which seems to be my fungus!
It has been found a few times here in Norway before.
Thank you for help.
Per.