Accès membres

Mot de passe perdu? S'inscrire

12-04-2026 17:56

Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

17-04-2026 19:16

Enrique Rubio Enrique Rubio

Hi to everybodyI would appreciate any assistance r

14-04-2026 05:32

Ethan Crenson

Hi all, A few weeks back a friend pointed out som

17-04-2026 15:14

Bruno Coué Bruno Coué

Bonjour.Récoltes du 16/04/2026, sur feuilles mort

12-04-2026 15:52

Gernot Friebes

Hi,I'm looking for help with this anamorph collect

14-04-2026 21:52

Gernot Friebes

Hi,found on dead leaves of Carex elata. Conidia: 4

16-04-2026 22:09

Buckwheat Pete

Hello, I'd like to ask about this older specimen:

15-04-2026 19:33

Fátima Durán Manzaneque

Hi!! I need help, I found this Ascomycete but I d

14-04-2026 20:31

Gernot Friebes

Hi,can this be Psilachnum lateritioalbum on Phragm

12-04-2026 12:22

William Slosse William Slosse

In a dune grassland in Oostduinkerke (Belgium), on

« < 1 2 3 4 5 > »
Pyrenopeziza
Guy Buddy, 29-04-2020 18:52
Good day,
I found these fruits on dead stems of Hydrangea arborescens in Pennsylvania, USA. Apothecia when fully opened 1-2mm. Spores in H20 measure (8.7) 11.6 - 15.6 (16.2) × (2.1) 2.3 - 3.2 (3.5) µm, Q = (3.7) 3.8 - 5.7 (6.6) ; N = 15, Me = 13.4 × 2.7 µm ; Qe = 4.9. Spores obovoid, aseptate even in the ascus, smooth. Asci measure ~50-60 x 9-10 um. IKI + blue. Paraphyses filiform. Hairs on outside appear smooth. 

I was thinking maybe P. fracta, which has been reported on Hydrangea before, spore size and shape match, but I am not sure.


Best,
Devin

  • message #62956
  • message #62956
  • message #62956
  • message #62956
Guy Buddy, 29-04-2020 18:57
Re : Pyrenopeziza
Micro
  • message #62957
  • message #62957
  • message #62957
  • message #62957
  • message #62957
  • message #62957
Hans-Otto Baral, 29-04-2020 20:36
Hans-Otto Baral
Re : Pyrenopeziza
This sounds a reasonable ID. Do you have literature which gives a spore size? Perhaps Seaver? The old authors don't give but mention the oblong clavate spore shape. I dod not hear of this species so far.
Guy Buddy, 30-04-2020 00:38
Re : Pyrenopeziza
Hey Hans,
P. fracta was from Linnean Society of London, 1904 that I pulled from Google. I am not confident on that and the name might be outdated or not even valid. I dont have much literature on this genus except Gremmen 1958, which depending on if "the receptical is verrucose or hairy" keys me out to Section 1, subsection b or Section 7 Trichantina, which includes P. escharodes. E. Rubio's micrographs of escharodes compares to what I am seeing with my specimen, thats as far as I have gotten.
Devin
Hans-Otto Baral, 30-04-2020 10:06
Hans-Otto Baral
Re : Pyrenopeziza
Oh yes, I see. So you have larger spores, maybe because they are alive.

The spores are larger than in P. escharodes. I suppose when you repeatedly collect this species on Hydrangea and it has always such large spores, it would be a hint on a good species. Otherwise only DNA will help to clarify this taxon.

Zotto