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15-07-2025 13:27

Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

14-07-2025 11:20

Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

16-01-2023 21:31

Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Gernot Friebes

Hi,do you think this collection could be R. ulmari

25-02-2023 18:36

Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

12-07-2025 16:45

Thierry Blondelle Thierry Blondelle

Bonjour à tous,J'avais d'abord pensé à des stro

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

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Hymenoscyphus on Rubus
Chris Yeates, 15-11-2021 16:37
Chris Yeates
Bonjour

Continuing my work on fungi on Rubus I recently collected a small section of dead Rubus fruticosus stem with three long-stalked Hymenoscyphus apothecia.

Under the microscope at x400 these looked like typical H. scutula (H- 19.2-22.5 x 4.4-5µm), though I could see no evidence of cilia. With oil at x1000 the usual cilia one might expect were not seen, but almost every ejected spore had 2 (occasionally 3) short projections, mostly at the "tail" end but also often at both ends. I managed to find something similar in Zotto's folder:

scutula - vitellinus H- > Hymenoscyphus scutula on Impatiens, 5.X.08.jpg

So this is not an unknown feature, I was interested, though, that this was not an occasional occurrence - with careful searching most (of many) spores showed this.

Chris
  • message #70697
  • message #70697
  • message #70697
  • message #70697
  • message #70697
Hans-Otto Baral, 15-11-2021 16:56
Hans-Otto Baral
Re : Hymenoscyphus on Rubus
Yes, this is nothing rare. Did you look for the ascus base? Surely without croziers I assume.

You can see them in my Hymenoscyphus menthae paper in H. macroguttatus (figs 32 33 36) and in a species on Vitis (62). In H. vitellinus they tended to be longer. This is quite a difficult group and requires DNA study.
Chris Yeates, 15-11-2021 18:22
Chris Yeates
Re : Hymenoscyphus on Rubus
Ah wie dumm von mir!


Thanks Zotto, and yes - as I think I said before - without croziers "H-"