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07-03-2020 15:22

Bionectriaceae (?) on stems of Rosa rugosa, March 2020, Denmark
Thomas Læssøe

spores mostly 11x 7 µm, but very variable, and as

06-03-2020 10:31

Psilachnum lateritioalbum ?
jean claude chasle

Bonjour, Récolte sur feuille de poacée en déco

05-03-2020 19:11

Tarzetta 8548
Leandro Sánchez Leandro Sánchez

Sous Quercus ilex et Pinus pinaster, terrain sablo

04-03-2020 15:27

Unknown black asco on vine/creeper
Sigrid Jakob

Black spheres growing between bark and wood of unk

04-03-2020 21:41

Asco érompant sur branche morte de Tilia
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

05-03-2020 08:01

Orbilia/Hyalorbilia paper
Koszka Attila

Dear Forum, dear Zotto!I am writing a pocket-book

03-03-2020 13:18

Cordieritidaceae
Gernot Friebes

Hi, we collected this on a decorticated branch

04-03-2020 19:52

Ascobolus carletonii - a close look
Chris Yeates Chris Yeates

Bonsoir tous A collection of dung of the British

04-03-2020 15:21

Pequeños discos cristalinos
Castillo Joseba Castillo Joseba

Recolectada en plante herbacea, tallo gordo, quizÃ

04-03-2020 16:13

Calycina ? Mollisia ?
Castillo Joseba Castillo Joseba

Me mandan el materoial seco desde Galicia,   reco

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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 :-)