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Mot de passe perdu? S'inscrire

31-12-2025 19:27

Baited fungus, help with ID.
Spooren Marco Spooren Marco

Collected from loamy soil, at waterside (completel

29-12-2025 17:51

En Rosmarinus
Blasco Rafael Blasco Rafael

Hola, me pueden ayudar con esta muestra.Recogida s

30-12-2025 16:44

Tubercularia aff. lateritia
Pascal Ducos

Bonjour,Une anamorphe rose stipitée, très nombre

29-12-2025 23:20

Sordariomycetes
éric ROMERO éric ROMERO

Bonjour, Une récolte du mois d'août 2025 en tou

30-12-2025 17:14

Asco brun sur renouée du Japon (Reynoutria japonica) (d'Albert Grobelny)
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous aider Albe

30-12-2025 15:31

Starform
Johan Boonefaes Johan Boonefaes

I found this unknown star form by the microscopy o

29-12-2025 10:15

Propolis sp. on Pinus sylvestris
Hulda Caroline Holte

Hello, I found and collected this propoloid ascom

30-12-2025 09:04

Pyrenomycete on rosemary
Josep Torres Josep Torres

Hello.A Pyrenomycete sprouting sparsely but very d

29-12-2025 17:44

Lamprospora ? laquelle ?
Isabelle Charissou

Bonjour,J'aimerais savoir si d'autres personnes au

12-11-2021 00:03

White dots on pine
Lepista Zacarias

Hi everybody,A week ago in my fiels trip I noticed

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Sclerotinia sclerotiorum?
Gernot Friebes, 28-08-2018 20:42
Hi,

I'm wondering if this is S. sclerotiorum, found at 2.300 m alt. among Cirsium spinosissimum. Sometimes the apothecia grew directly on strongly decayed stems of the Cirsium, but in some cases such a connection was not readily apparent. The ascospores are 2-nucleate, measure about 12–15.5 x 6–7 µm, the excipulum is weakly amyloid. 

Best wishes,
Gernot
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  • message #54537
  • message #54537
Hans-Otto Baral, 28-08-2018 21:33
Hans-Otto Baral
Re : Sclerotinia sclerotiorum?
The VBs in the paraphyses exclude a Sclerotinia. I suggest a Botryotinia (now Botrytis). Did you study the medulla of the sclerotium for host tissue?

How large are the apos?

But I am sure what it is: Sclerotinia cirsii-spinosissimi. This is actually a Botryotinia according to the sequence.
Gernot Friebes, 28-08-2018 22:00
Re : Sclerotinia sclerotiorum?
Right, I forgot about the VBs... The authors of S. cirsii-spinosissimi write that the medullary excipulum is not blueing in IKI; I did observe a blueish reaction, however (see second plate, photo on the bottom right). Maybe this feature can vary?

Thank you and best wishes,
Gernot
Gernot Friebes, 28-08-2018 22:04
Re : Sclerotinia sclerotiorum?
PS: I did not study the sclerotium. The apothecia were relatively large and fleshy and thus hard to overlook, up to about 8 mm in diameter.
Hans-Otto Baral, 28-08-2018 22:18
Hans-Otto Baral
Re : Sclerotinia sclerotiorum?
I can imagine variation in the blueing of the medulla, but I am not sure.