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20-03-2026 16:16

Pseudomassaria-like on Cornus alba
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These 0.5 mm diam. acervuli were breaking through

20-03-2026 12:53

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Hello everybody, In the field, from distance, my

19-03-2026 19:34

Xylariaceae? on Carpinus betulus wood
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Hello everyone,a few days ago I collected this str

19-03-2026 18:25

Myriosclerotinia curreyana?
William Slosse William Slosse

Good evening everyone, On 18/03/26 I found a few

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Lasiobelonium corticale ?
François Freléchoux François Freléchoux

Bonjour, Voici la description rapide d'un petit d

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"Lasiosphaerioid"
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Hello everybody, I hope for some hints... Macro:

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Massarina on Corylus
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Hi to everybodyThese thiny, blackish pseudothecia

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Orbilia on Celtis occidentalis
Khomenko Igor Khomenko Igor

I recently examined Celtis occidentalis branches

17-03-2026 19:41

Pyréno sur branche morte de chêne
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

18-03-2026 17:22

Literature search
Katarina Pastircakova

Hi there,I'm looking for the following literature:

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Ciborinia en aulnaie à ail des ours
Bernard CLESSE, 05-06-2015 19:24
Bernard CLESSEBonsoir à tous,

Pouvez-vous me donner une piste pour ce Ciborinia greffé sur sclérote noir en forme de banane, trouvé en aulnaie à ail des ours dans un mélange de matière organique (feuilles) pourrissantes et terre mêlée ? 

a) asques IKI+
b) spores étroitement ellipsoïdes à ovales : 9-12,5x2,5-4,5
c) certaines spores présentent une enveloppe hyaline qui se détache (cf. spore1) 
d) paraphyses filiformes, septées, certaines flexueuses au sommet
e) excipulum à textura globularis 

Bernard
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Lothar Krieglsteiner, 05-06-2015 20:37
Lothar Krieglsteiner
Re : Ciborinia en aulnaie à ail des ours

Hi Bernard,


can you tell us how many spores are in the asci? In your picture I see 4, but the foto maybe shows not the whole ascus. 


Regards from Lothar

Hans-Otto Baral, 05-06-2015 20:52
Hans-Otto Baral
Re : Ciborinia en aulnaie à ail des ours
tres characteristique especes! The banana-shape, long and thin stipe, and occurrence in Alnetum leave no doubt about what Lothar surely also thoght: Sclerotinia capillipes.

This is usually 4-spored but 8-spored apothecia also occur. Uwe Lindemann wrote an article on it for which I also supplied data. here attached.

Zotto
Lothar Krieglsteiner, 05-06-2015 20:55
Lothar Krieglsteiner
Re : Ciborinia en aulnaie à ail des ours
yes, Zotto, you are right - I also thought of Sclerotinia capillipes :-)
Bernard CLESSE, 05-06-2015 21:00
Bernard CLESSE
Re : Ciborinia en aulnaie à ail des ours
Big thank you to Patrice Tanchaud (who offered me the name of species) as well as Lothar and Zotto for your confirmations and documentation on this Sclerotinia !

I'll check the number of spores per ascus in 30 minutes.

Bernard

Hans-Otto Baral, 05-06-2015 21:22
Hans-Otto Baral
Re : Ciborinia en aulnaie à ail des ours
The genus Ciborinia is surely better for this species because of tracheids in the sclerotial medulla, but that genus is today questioned again....
Bernard CLESSE, 05-06-2015 22:41
Bernard CLESSE
Re : Ciborinia en aulnaie à ail des ours
Good evening all,

I redid one preparation and I have predominantly observed 4spored-asci but sometimes with 3, 5, 6 or 8 spores !


Here are some more pictures of spores and paraphyses. Paraphyses are slightly swollen at the top and the spores are finally : 6-13x2,5-4,5

Bernard 

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Hans-Otto Baral, 06-06-2015 08:46
Hans-Otto Baral
Re : Ciborinia en aulnaie à ail des ours
Thanks! The interesting thing is that the spores are binucleate in 4-spored asci, because there are no aborted spores. This seems to mean that the 8 nuclei are going as pairs in the spores. In 8.spored asci the spores should then be uninucleate. This is unusual because in some other species of Sclerotiniaceae 4 spores abort early and are then much smaller than the other four.

Nuclei are difficult to see. usually staining with IKI helps.
Bernard CLESSE, 06-06-2015 08:52
Bernard CLESSE
Re : Ciborinia en aulnaie à ail des ours
OK Zotto, great thanks for this information.

Bernard