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15-01-2020 20:10

Mlcoch Patrik Mlcoch Patrik

Please about determination this interesting collec

15-01-2020 19:48

Stip Helleman Stip Helleman

Dear all, on behalf of our collegue Ricardo Galan

13-01-2020 22:10

Thorben Hülsewig

Hi there,yesterday i found this Nectria-like fungu

15-01-2020 15:30

Benko Gabor Benko Gabor

Dear Members! Can you help me please with this? I

13-01-2020 15:37

Mirek Gryc

Something like Hydropisphaera?Yesterday found on o

14-01-2020 16:00

Thomas Læssøe

This material was brought in recently in airdried

17-12-2019 22:45

Viktorie Halasu Viktorie Halasu

Hello forum,is there any index of host plants for

13-01-2020 20:14

Maren Kamke Maren Kamke

Good evening, does anyone have a copy of this art

12-01-2020 10:28

Simon Kennedy

I apologise for raising this topic again, but can

13-01-2020 11:00

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, could someone provide this publication, ple

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unknown discomycete on the Petasites petiole
Mlcoch Patrik, 15-01-2020 20:10
Mlcoch PatrikPlease about determination this interesting collections from summer. 

Apothecia only several milimetres in diam., without marginal setacceous cells, excipulum consist of subhyaline to yellowish cells of textura angularis-(intricata), 8-10 x 5-7,5 um. Asci IKI- in lugol reagens, 90-100x8,5-9,5 um, base (see fig. 2 - in dead, detail 6), paraphyses 112 x 7 um, guttulate (OCI see fig. 2 - in dead, detail 3 and 5), ascospores 0-1-septate, 17-19,5 x 4,5-5,5(5,7) um, Q=3,5-4, Qav=3,8, Me=18x4,8 um. 
On dead petiole of Petasites hybridus, Slovakia, near the Tatra National Park, 800 metres above sea level, soc. Typhula uncialis. 
Thanks you for determination.
  • message #60913
Hans-Otto Baral, 15-01-2020 20:49
Hans-Otto Baral
Re : unknown discomycete on the Petasites petiole
This is Micropeziza umbrinella (= Allophylaria spoederholmii).

Let me say that the majority of cells are dead in your "live" collage anyway. Water alone is not sufficient, avoiding pressure keeps them alive.