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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


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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Yellow asco on Tilia wood
Enrique Rubio, 31-12-2012 17:12
Enrique RubioHi again:

Yesterday I have collected on Tilia wood at 800 m of altitude these small ascomata up to 0.45 mm in diam. with IKI bb asci, croziers (+), some of them with basal globule and + or - lanceolate paraphyses with small yellowish Vb's. Ectal excipulum of an elongate textura prismatica without gelified tissues. 
Hairs in fascicles very difficult to dissociate, + or - yellowish, multiseptate with end cell straight to slightly uncinate, KOH negative.

Maybe a Psilocistella species? because I think it's not an Hamatocanthoscypha as H. uncipila.
What's your opinion?

Many thanks again

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Hans-Otto Baral, 31-12-2012 17:56
Hans-Otto Baral
Re : Yellow asco on Tilia wood
Great! It is very similar to Psilachnum rubrotinctum, which I would place in Cistella, but the spores are too short, and the substrate woody.

Seppo Huhtinen once sent me photos of one growing on wood of Populus but mainly on a resupinate polypore. But the spores are a bit larger than yours (5-8 x 2 ?) , though ?similar.

I attach images (hairs are probably in KOH).

Please check NH4OH for a purplish reaction of the yellow VBs.


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Enrique Rubio, 31-12-2012 18:19
Enrique Rubio
Re : Yellow asco on Tilia wood
The ascomata turns quickly reddish with the ammonia vapours as Psilachnum rubrotinctum!

Could be better in Psilachnum?
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Hans-Otto Baral, 31-12-2012 18:39
Hans-Otto Baral
Re : Yellow asco on Tilia wood
Fine! I don't know such reaction in Psilachnum (with smooth, straight hairs). But also Cistella does not seem to have it. A matter for molecular people.
Enrique Rubio, 31-12-2012 18:45
Enrique Rubio
Re : Yellow asco on Tilia wood
OK. Thanks again
Michel Hairaud, 31-12-2012 18:52
Michel Hairaud
Re : Yellow asco on Tilia wood
Bravo Enrique pour cette superbe récolte . Il s'agit d'une nouvelle merveille pour Somiedo, je suppose !
Excellent pour terminer cette année 2012. 

J'espère que Somiedo révèlera ses richesses aux nombreux mycologues que nous recevrons dans ce paradis en juin 2013 !

Enrique Rubio, 31-12-2012 21:25
Enrique Rubio
Re : Yellow asco on Tilia wood

Cher ami:

  J'espère aussi que beaucoup de notres amis viendrons chez nous pour connaitre notre 'micobiodiversité'

A bientot