08-11-2025 00:29
Francois Guay
I found this species in Quebec, Canada, on herbace
04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
04-11-2025 12:43
Edvin Johannesen
Hi! One more found on old Populus tremula log in O
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
Ciborinia en aulnaie à ail des ours
Bernard CLESSE,
05-06-2015 19:24
Bonsoir 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
Lothar Krieglsteiner,
05-06-2015 20:37
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
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
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
Lindemann-2011-Sclerotinia-capillipes-0002.pdf
Lothar Krieglsteiner,
05-06-2015 20:55
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
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.
I'll check the number of spores per ascus in 30 minutes.
Bernard
Hans-Otto Baral,
05-06-2015 21:22
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
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
Hans-Otto Baral,
06-06-2015 08:46
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.
Nuclei are difficult to see. usually staining with IKI helps.
Bernard CLESSE,
06-06-2015 08:52
Re : Ciborinia en aulnaie à ail des ours
OK Zotto, great thanks for this information.
Bernard
Bernard