Accès membres

Mot de passe perdu? S'inscrire

19-12-2017 05:54

Help needed
Garrett Taylor Garrett Taylor

on where to start searching for this one. spores 4

13-12-2017 20:24

Geopora & Melanospora
Bernard CLESSE Bernard CLESSE

J'ai trouvé hier, dans un xérobrometum (pelouse

18-12-2017 12:24

Xylaria ? species
Pauline. Penna

Bonjour tousThese tiny Xylaria were found on a fal

19-12-2017 00:32

Phacidium?
Masanori Kutsuna

Hello everyone, I found this disco on fallen leaf

18-12-2017 21:42

One more pyreno on Corylus.
Per Marstad Per Marstad

Hello.Fruitbody 1-2 mm wide.Spores 15-18x9-10.Is i

14-12-2017 11:51

Discomycet on Salix.
Per Marstad Per Marstad

3-8 mm in diameter, black, sp. 14-15 x 7-8 my, asc

18-12-2017 10:41

Pyrenomycet on Corylus avellana.
Per Marstad Per Marstad

Hello.I would like a name on this.Spores 15x6 my.A

18-12-2017 12:24

Xylaria ? species
Pauline. Penna

Bonjour tousThese tiny Xylaria were found on a fal

17-12-2017 10:54

Pyrenomycet on Fagus.
Per Marstad Per Marstad

Hello.This was found on sticks of Fagus.Spores 11-

17-12-2017 13:17

En Rosa canina
Blasco Rafael Blasco Rafael

Hola, de nuevo necesito su ayuda con esta muestra,

« < 691 692 693 694 695 > »
Ciboria (?) en xérobrometum
Bernard CLESSE, 13-12-2017 10:41
Bernard CLESSEBonjour à toutes et tous,

J'ai trouvé hier en pelouse calcicole xérique très rase (xérobrometum) ce petit asco qui me fait penser à un Ciboria.

a) diamètre apothécie : 2,5 mm
b) longueur pied : 2 mm
c) spores elliptiques-subfusiformes, à 2 guttules polaires : 18,5-21x8,5-9 µ
d) asques IKI+
e) excipulum à textura globosa, à cellules brunes, les terminales hyalines et cylindro-clavées
f) paraphyses hyalines, à peine élargies à l'apex.

Bernard
  • message #51586
  • message #51586
  • message #51586
  • message #51586
  • message #51586
Lothar Krieglsteiner, 13-12-2017 11:15
Lothar Krieglsteiner
Re : Ciboria (?) en xérobrometum

Hi Bernard,


I think this is Sclerotinia trifoliorum.


You have overlooked the sclerotia.


Look at your ascus-foto - you see 4 small and 4 larger spores.


The habitat is quite typical, the species is quite common in meadows, but mostly only solitary or few ascomata.


Best regards, Lothar

Bernard CLESSE, 13-12-2017 11:22
Bernard CLESSE
Re : Ciboria (?) en xérobrometum
Big thanks for your answer Lothar!

Do you know the potential hosts of this Sclerotinia because in this environment there is to my knowledge no Trifolium but many other Fabaceae (Hippocrepis, Anthyllis, Medicago…) ?

Best regards,

Bernard

Lothar Krieglsteiner, 13-12-2017 15:34
Lothar Krieglsteiner
Re : Ciboria (?) en xérobrometum

Hi Bernard,


I fear I cannot help you with this - perhaps the species is not very specialized.


Best regards from Lothar

Bernard CLESSE, 13-12-2017 15:45
Bernard CLESSE
Re : Ciboria (?) en xérobrometum
OK Lothar, thank you.

Bernard
Martin Bemmann, 13-12-2017 16:01
Martin Bemmann
Re : Ciboria (?) en xérobrometum
Dear Bernard,

check this database: https://nt.ars-grin.gov/fungaldatabases/fungushost/fungushost.cfm

there are a lot of hosts for S. trifoliorum!

Best regards
Martin
Bernard CLESSE, 13-12-2017 16:14
Bernard CLESSE
Re : Ciboria (?) en xérobrometum
Great thanks Martin !

I see that Medicago, Lotus corniculatus and Anthyllis could be hosts of Sclerotinia trifoliorum, which may be suitable.

Best regards,

Bernard