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20-12-2025 10:49

Small resin asco?
Mirek Gryc

Hi. „I doubt it is possible to identify this ti

23-12-2025 08:27

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

23-12-2025 11:27

blanc poilu
Louis DENY

bonjour forum,sur débris de bois de feuillu (acer

21-12-2025 09:32

Spherical Pyrenomycete
Josep Torres Josep Torres

Hello.A tiny ascomycete found embedded in wood in

21-12-2025 21:32

Anamorf on decaying leaves of Euonymus japonicus 'Microphyllus'
Pol Debaenst

Hello, Garden, Burgweg 19, Veurne, BelgiumOn 10/1

22-12-2025 23:38

Phylloscypha labessiana ?
Patrice TANCHAUD

Bonsoir, récolte sur un mur en pierre, apothéci

21-12-2025 12:34

Nectria ??
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

22-12-2025 00:47

Phylloscypha boltonii
Patrice TANCHAUD

Bonsoir, récolte à proximité du milieu dunaire

21-12-2025 21:40

recherche de références biblio
Isabelle Charissou

Bonjour, j'aimerais connaitre les références de

20-12-2025 23:08

Malvipezia pauli !
Patrice TANCHAUD

Bonsoir, récolte sur sol sablonneux dans l'arriÃ

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Bionectriaceae (?) on stems of Rosa rugosa, March 2020, Denmark
Thomas Læssøe, 07-03-2020 15:22
spores mostly 11x 7 µm, but very variable, and asci not always with 8 spores. Slightly roughened walls, non-constricted, 2-celled, hyaline. KOH negative (or slightly pinkish under LM). Surface white bristly hairy; hairs widened at the tips. Outer exc. of very thick-walled,clavate cells. Apparently gathered on some stroma -nothing underneath in section

see images on the Danish atlas project

https://svampe.databasen.org/observations/10085848

Christian Lechat, 07-03-2020 15:54
Christian Lechat
Re : Bionectriaceae (?) on stems of Rosa rugosa, March 2020, Denmark
Hi Thomas,
it could be a species of Fusicolla but you should check it the ascomata change of colour in lactic acid, which become bright yellow to orange in this reagent.

If there is no change in colour, maybe you should consider the genus Nectriopsis.

I attach two articles with illustrations about Fusicolla.

All the best,
Christian
Thomas Læssøe, 07-03-2020 16:16
Re : Bionectriaceae (?) on stems of Rosa rugosa, March 2020, Denmark
thanks :-)