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11-03-2026 17:36

Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

09-02-2026 22:01

ruiz Jose

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

11-03-2026 16:48

Bruno Coué Bruno Coué

Bonjour, je serais heureux d'avoir votre avis sur

11-03-2026 14:14

Gernot Friebes

Hi,I would like to share a collection of Scopinell

15-09-2020 17:27

Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte décortiquée de Berbe

10-03-2026 18:08

Marc Detollenaere Marc Detollenaere

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

05-03-2026 10:07

Hulda Caroline Holte

Hello, I found and collected this species growing

07-03-2026 13:06

éric ROMERO éric ROMERO

Bonjour tous, Sur cône d'épicea fortement imbu,

23-12-2025 08:27

Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

28-02-2026 11:05

Yanick BOULANGER

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

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Apothecia with hyphomycetes on Helianthus - Denmark
Karen Poulsen, 13-04-2024 12:49
On standing stem from last year. Surrounded by hyphomycetes and seen elsewhere without.

Small, greyish apothecia, approx. 250 µm diam. Slightly tapered, but without an actual stalk. The outside consisting of round (at the bottom) to more elongated cells, ending at the top with long cells rounded at the tip. A few cells appear to end in a hair?. Paraphyses +/- curved at the top, where they are also slightly expanded to approx. 3 µm. Otherwise 2.2-2.4 µm. Asci 8-spored, somewhat thick-walled, club-shaped, J- in lugol, 44-54 x 11-15 µm. Spores 0-1(3) septate, with a sort of sheath around, from which the spores may be released. Some spores seem to be without. Is measured up to 6 µm in width. The spores measure 17.4-20.9 µm.


Best regards,


Karen P.

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Martin Bemmann, 13-04-2024 12:55
Martin Bemmann
Re : Apothecia with hyphomycetes on Helianthus - Denmark
Hi Karen,

sounds and looks like Strossmayeria sp.

Compare with this collection:


Do you have pictures of the Conidia of the hyphomycete?

Regards

Martin
Karen Poulsen, 13-04-2024 14:44
Re : Apothecia with hyphomycetes on Helianthus - Denmark
Hi Martin,

Thank you. I have uploadet photos of hyphomycetes with conidia. Does any Strossmayeria have that kind of conidia?
Martin Bemmann, 13-04-2024 14:54
Martin Bemmann
Re : Apothecia with hyphomycetes on Helianthus - Denmark
I don't think that these are mature conidia (too hyaline and small). Attached is a selection of different species from Iturriaga & Korf 1990.

Regards

Martin
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Karen Poulsen, 13-04-2024 16:13
Re : Apothecia with hyphomycetes on Helianthus - Denmark
The material is from February, so doesn't mature any more. I have looked at the bottom and find darker and larger conidia, 16-22 x 5-65 µm.
Martin Bemmann, 13-04-2024 16:38
Martin Bemmann
Re : Apothecia with hyphomycetes on Helianthus - Denmark
Hmm.. they do not fit to Pseudospiropes :-(

 So maybe it is something else...

Sorry

Martin
Karen Poulsen, 13-04-2024 16:46
Re : Apothecia with hyphomycetes on Helianthus - Denmark
Thanks anyway :-)
Hans-Otto Baral, 13-04-2024 16:54
Hans-Otto Baral
Re : Apothecia with hyphomycetes on Helianthus - Denmark
The living ascus of the 2nd photo looks fully maturem and I conclude that the spores are non-septate when mature. This is no Strossmayeria but I have no idea what else.

In Strossmayeria the spores are multiseptate when ejected. Usually parts of the excipulum react amyloid (blue), which could be checked here.
Karen Poulsen, 13-04-2024 18:06
Re : Apothecia with hyphomycetes on Helianthus - Denmark
Thank You,

There is no reaction at the excipulum in lugol - dried material.

Regards,

Karen P.