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30-11-2024 18:43

Yanick BOULANGER

BonjourVoici une récolte du 31/10/2024 sur boisJe

03-12-2024 12:47

Vasileios Kaounas Vasileios Kaounas

Hymenoscyphus conscriptus ? In Hedera helix, in f

03-12-2024 02:17

Francois Guay Francois Guay

I found this species back in September. Growing on

02-12-2024 19:02

Margot en Geert Vullings

On a fallen branch, probably Acer, we found these

02-12-2024 20:09

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

18-04-2013 18:16

Nina Filippova

Good evening. Some loculoascomycet was found on l

02-12-2024 16:13

Paul Diederich Paul Diederich

Flora of Lichenicolous FungiVolume 2 · Hyphomycet

02-12-2024 14:29

Przemyslaw Drzewiecki

Hello everyoneFound 30.11.2024 near Bydgoszcz, Pol

02-12-2024 12:53

JOHN RATCLIFFE

Hello,         found on upperside of fallen d

02-12-2024 05:45

Ethan Crenson

Hello all, Yesterday in a wooded park in the Bron

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Pleospora-like from sphagnum
Nina Filippova, 18-04-2013 18:16
Good evening.

Some loculoascomycet was found on leaves of sphagnum, probably somebody may have acquaintance with it. I am only fiddling around Pleospora, but have not looked seriously into the keys of this group yet.


Pseudothecia globose (130-200 mk), without stroma, site single at the surface of sphagnum leaves and at miscellaneous substrates, attached to the surface with many "hairs" (brown hypha arising at the surface at base and sides and outspread to the substrate), the same hairs but shorter arise from upper part.


Peridium from angular cells about 5 mk in diameter, hairs 3 mk thick at base; asci clavate - near globose, with 1 single spore, about 90 x 55 mk; paraphysoid tissue ("parenchymatic") present; spores muriform, hyaline when in asci, dark brown when mature, elongated with middle constriction at first, but enlarged to oval, almost globose when mature, with 3-5 longitudinal and up to 10 transverse septa, with many oil droplets inside, 64-81 x 26-46 (N=11).

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  • message #22976
  • message #22976
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Georges Greiff, 02-12-2024 19:00
Re : Pleospora-like from sphagnum
I think Julella might be appropriate for this collection based on the general features, particularly hyaline to darkening mature spores with few (1?) developing to maturity per ascus. These are likely algicolous rather than bryophilous s.str., but certainly worth investigating.
George