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18-06-2018 04:55

Andgelo Mombert

Bonsoir,Sur tige morte de Gentiana lutea, en compa

11-06-2018 20:34

Andgelo Mombert

Bonsoir,Sur tige morte de plante, probablement d'A

18-05-2018 18:38

Riet van Oosten Riet van Oosten

Hello,Found 17-05-2018, The Netherlands.On: Phragm

17-06-2018 00:36

Alan Rockefeller Alan Rockefeller

Looks like what is passing for Caloscypha fulgens

14-06-2018 22:33

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toute et tous,Voici un Saccobolus trouv

14-06-2018 12:55

Savic Dragisa

Hi, I need help for this Helvella species. I found

15-06-2018 12:19

Pintos Angel Pintos Angel

anybody can help wiht this?Koskela P (1983) Arthri

15-06-2018 09:45

Yannick Mourgues Yannick Mourgues

Bonjour. Je suis à la recherche de : - Rivista

13-06-2018 12:01

Bernard Declercq Bernard Declercq

Hi to all, I would be very pleased to receive a p

06-06-2018 14:42

François Bartholomeeusen

Dear forum members, On Equisetum fluviatile I fou

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discomycete (Sclerotiniaceae?) on Arundo leaves in Portugal
Lothar Krieglsteiner, 02-02-2018 19:17
Lothar Krieglsteiner

Collected in Portugal, Algarve, nature reserve Fonte Benemola north of Loule, 3.1.2018.


Substrate is Arundo donax, as the leaf remains were partly still adhering to the thick lying stems. Unfortunately, most of the collection is badly ripe but I think I could get most of the important characters. Unripe spores in the asci mostly were much smaller (maybe 12-15 µm) than the free ones I measured here.


The IKI-reaction of the asci is weak and cannot be seen at all asci. For some time, I was not at all sure to have an inoperculate discomycete - but my pictures clearly show the porus.


I think this should be looked for in the Sclerotiniaceae (?) - but I do not have a good idea about the genus and species.


Who can help?


Best regards from Lothar

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Hans-Otto Baral, 02-02-2018 22:59
Hans-Otto Baral
Re : discomycete (Sclerotiniaceae?) on Arundo leaves in Portugal
Hoi Lothar

I see true croziers on your photo, though a bit difficult to recognize, because also basal protuberances occur.  This and the occurrence on Poaceae speaks for Rutstroemia calopus. In my folders this is the unpublished genus Clarireedia which exists only in the web. Actually, this group stands apart from Rutstroemia in phylotrees. It was suggested for the dollarspot disease Sclerotinia homoeocarpa, which clustered with a R. paludosa sequence in CBS (see my homoeocarpa folder).

Zotto
Lothar Krieglsteiner, 02-02-2018 23:48
Lothar Krieglsteiner
Re : discomycete (Sclerotiniaceae?) on Arundo leaves in Portugal

Hello Zotto,


thanks a lot for your expertise. I had thought of R. calopus but got away of it because I found the spores not typical for a Rutstroemia.


Nice to have a name, then :-)


Thanks again and best regards, Lothar