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13-12-2019 20:42

Götz Palfner Götz Palfner

Bonjour tous,Sorry, but as my French is crap, I wi

14-12-2019 10:09

Marc Detollenaere Marc Detollenaere

Dear forum,   On a decorticated trunk of Populu

11-12-2019 22:21

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Pourriez-vous me confirm

11-12-2019 23:29

Juuso Äikäs

I found these in a Picea abies dominated forest in

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

13-12-2019 16:20

Chris Yeates Chris Yeates

Bonjour tous this is an area I feel rather ignora

12-12-2019 23:42

Maren Kamke Maren Kamke

Hello together, can someone provide me with this

12-12-2019 18:36

Roland Labbé

Bonjours ! Voici un Trichoderma (Hypocrea) inconn

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

11-12-2019 23:25

Ethan Crenson

Hello all,This was found by a friend in New York C

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Karstenia?
Enrique Rubio, 03-05-2019 21:38
Enrique RubioThese apothecia grew in a decorticated branch of hardwood of 10 mm thick, fallen to the ground, product of a pruning.The hymenium is dextrinoid and the ascospores are multiseptate. I think in Karstenia as a good genus for it.
What do you think?
This collection is from central Spain at 1000 m of altitude, april 6(2019).
Many thanks again
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Hans-Otto Baral, 03-05-2019 21:56
Hans-Otto Baral
Re : Karstenia?
Hi Enrique
With Karstenia I agree. It could be valuable to make a KOH-pretreatment and test in IKI or MLZ (both the same), you will get a blue hymenium (hemiamyloid, not dextrinoid!) and perhaps a small blue  apical ring becomes visible under oil immersion, depending on the species. Dextrinoid would mean red in MLZ whereas your pic clearly shows no reaction in MLZ.

Zotto
Jason Karakehian, 03-05-2019 22:11
Jason Karakehian
Re : Karstenia?
Hi Enrique, do you observe longitudinal wrinkles on the ascospores at all?
Enrique Rubio, 04-05-2019 01:18
Enrique Rubio
Re : Karstenia?
No, Jason. I haven't observed any ornamentation on the spores.
Enrique Rubio, 04-05-2019 01:46
Enrique Rubio
Re : Karstenia?
From dried, not fresh material:
*Mlz. + KOH-pret. = negative
*IKI + KOH-pret. = reddish, not blue
I haven't observed any bluish apical pore.
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Hans-Otto Baral, 04-05-2019 08:37
Hans-Otto Baral
Re : Karstenia?
Sorry, but your KOH pretreatment must have been very weak. I cannot imagine that an ostropalen fungus does not turn to an I-blue reaction even if exposed to 1-2% KOH for a few seconds only.