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Add-on topic http://www.ascofrance.com/forum/7059
Yellow asco on Tilia wood
Enrique Rubio,
31-12-2012 17:12
Hi 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
Enrique
Hans-Otto Baral,
31-12-2012 17:56
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.
Zotto
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.
Zotto
Enrique Rubio,
31-12-2012 18:19
Re : Yellow asco on Tilia wood
The ascomata turns quickly reddish with the ammonia vapours as Psilachnum rubrotinctum!
Could be better in Psilachnum?
Could be better in Psilachnum?
Hans-Otto Baral,
31-12-2012 18:39
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
Re : Yellow asco on Tilia wood
OK. Thanks again
Michel Hairaud,
31-12-2012 18:52
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 !
Amitiés
Michel
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 !
Amitiés
Michel
Enrique Rubio,
31-12-2012 21:25
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
Enrique