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Philippe PELLICIER

Sur branche morte de Mélèze. Les ascospores sphÃ

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Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

16-09-2025 12:53

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

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Enrique Rubio Enrique Rubio

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Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

10-09-2025 17:18

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Pyrenopeziza/Mollisia on stems of Impatiens
Mlcoch Patrik, 06-11-2021 19:59
Mlcoch PatrikHi,
Please about help with determination of this collection.
Found on the dead stems of Impatiens glandulifera in the Czech Republic, 2. 9. 2021.
Marginal cells 16 x 5,5 um, excipular cells 13-15 x 10-12,5 um, dark brown. Asci IKI(+?), 35-40 X 5-7 um, paraphyses 30 x 1,8 um. Ascospores fusoid, hyaline, OCI=0-1, 7-9(9,5) x 1,7-2,5 um, Q=3,5, Me=8 x 2,3 um. KOH reaction of excipulum negative. 
Any idea?? Thanks. 
  • message #70558
  • message #70558
Hans-Otto Baral, 06-11-2021 20:53
Hans-Otto Baral
Re : Pyrenopeziza/Mollisia on stems of Impatiens
To me this looks like a Mollisia. The crucial KOH reaction refers to the hymenium. Did you study living paraphyses? Herewith you can distinguish Pyrenopeziza which has no VBs (refractive vacuoles). To suggest a species name is difficult. M. revincta has a yellow KOH-reaction
Mlcoch Patrik, 06-11-2021 23:21
Mlcoch Patrik
Re : Pyrenopeziza/Mollisia on stems of Impatiens
Thanks, this was microscopied in the freshes condition, what was possible.
Hans-Otto Baral, 07-11-2021 10:06
Hans-Otto Baral
Re : Pyrenopeziza/Mollisia on stems of Impatiens
The your methods are not appropriate

- water as mountant

- don't apply pressure on the cover slip when studying sections and only very slight pressure for squash mounts.