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20-12-2025 23:08

Malvipezia pauli !
Patrice TANCHAUD

Bonsoir, récolte sur sol sablonneux dans l'arriÃ

21-12-2025 09:32

Spherical Pyrenomycete
Josep Torres Josep Torres

Hello.A tiny ascomycete found embedded in wood in

21-12-2025 01:54

Ophiostoma
David Chapados David Chapados

Hi,Would it be possible to find the species with t

20-12-2025 15:47

Greenish asco on pine?
Mirek Gryc

Hi.These grew on pine wood that was heavily covere

20-12-2025 10:49

Small resin asco?
Mirek Gryc

Hi. „I doubt it is possible to identify this ti

18-12-2025 21:17

Two collections of yellowish discs on bare ground
Pol Debaenst

The identification took me to Byssonectria deformi

15-12-2025 07:09

indet. Rutstroemiaceae sp. on unk. fallen leaves
Danny Newman Danny Newman

indet. Rutstroemiaceae sp. on unk. fallen leavesMc

19-12-2025 10:10

Peziza vers varia ?
Patrice TANCHAUD

Bonjour, récolte réalisée en milieu dunaire, a

18-12-2025 17:23

Polydesmia fructicola ?
Bruno Coué Bruno Coué

Bonjour,je serais heureux d'avoir votre avis sur c

18-12-2025 18:07

Phaeoisaria like?
Margot en Geert Vullings

These plumes were found on rotten wood.They strong

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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
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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