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25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

09-02-2026 22:01

Sp
ruiz Jose

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

10-02-2026 17:42

Hélotiale blanche sur Sambucus racemosa
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me donner

10-02-2026 18:54

Unknown pink heliotale on sphagnum
Erik Van Dijk

Does anyone has an idea what fungus species this m

09-02-2026 20:10

(2 different or one ?) Hypoxylon from the Algarve – on Acacia and Arbutus
Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Cistella granulosella of Hyphodiscus incrustatus?
Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

09-02-2026 11:42

Lachnum sp.
Ã…ge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

02-02-2026 21:46

Dark disc on Populus
Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

25-01-2026 23:23

Delitschia/Lojkania? on wood
Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

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Rutstroemia? sobre madera
Rubén Martínez-Gil, 17-09-2017 12:05
Rubén Martínez-Gil

Hola a todos.


Subo unas fotos de una Rutstroemia? que encontré ayer sobre ramitas sin identificar, en bosque mixto de F sylvatica-Q pyrenaica, entre otros.


Esporas de 20-23 x 5,3-6,2 micras.


Ascas amiloides, pleurorrincas.


¿Qué les parece?


Gracias por su ayuda.


Rubén

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Hans-Otto Baral, 17-09-2017 13:15
Hans-Otto Baral
Re : Rutstroemia? sobre madera
Great! Rutstroemia for sure, but I do not remember such with navicular spores.

Quercus and Fagus you should be able to distinguish with the wood pores (ring-pored or not).  Did you look at a broken twig?

Zotto
Martin Bemmann, 17-09-2017 13:28
Martin Bemmann
Re : Rutstroemia? sobre madera
Why not R. firma? esp. when Quercus is possibly involved. See White's drawing attached.

Regards
Martin
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Hans-Otto Baral, 17-09-2017 13:33
Hans-Otto Baral
Re : Rutstroemia? sobre madera
You are right, Martin, my impression was that the spore ends are acute, but they are rather obtuse. 

The strange thing is that R. firma usually has curved spores, but I saw also populations with straight spores. These here are completely straight. I wonder if this is all the same.

R. firma was also mixed with R. alnobetulae in earlier times, who knows how many taxa exist.

I suspect that DNA would help....
Zotto
Martin Bemmann, 17-09-2017 13:42
Martin Bemmann
Re : Rutstroemia? sobre madera
The spores in Rubén's collection seem to have a sheath (fig. 6). Is this confirmed for R. firma?
Hans-Otto Baral, 17-09-2017 16:53
Hans-Otto Baral
Re : Rutstroemia? sobre madera
Such sheath has almost every Sclerotiniaceae and Rutstroemiaceae, and not only.
Rubén Martínez-Gil, 18-09-2017 17:52
Rubén Martínez-Gil
Re : Rutstroemia? sobre madera

Gracias por su ayuda, Zotto, Martin.


Subo unas fotos del palito donde las encontré. Mide 5 mm de diámetro. No tengo claro que sea de Quercus o Fagus.


La dejo de momento como R firma.


Saludos


Rubén

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