Helotiales on Betula leaf - Forum ASCOFrance

31-12-2025 19:27

Baited fungus, help with ID.

Spooren Marco

Collected from loamy soil, at waterside (completel

29-12-2025 17:51

En Rosmarinus

Blasco Rafael

Hola, me pueden ayudar con esta muestra.Recogida s

30-12-2025 16:44

Tubercularia aff. lateritia

Pascal Ducos

Bonjour,Une anamorphe rose stipitée, très nombre

29-12-2025 23:20

Sordariomycetes

éric ROMERO

Bonjour, Une récolte du mois d'août 2025 en tou

30-12-2025 17:14

Asco brun sur renouée du Japon (Reynoutria japonica) (d'Albert Grobelny)

Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous aider Albe

30-12-2025 15:31

Starform

Johan Boonefaes

I found this unknown star form by the microscopy o

29-12-2025 10:15

Propolis sp. on Pinus sylvestris

Hulda Caroline Holte

Hello, I found and collected this propoloid ascom

30-12-2025 09:04

Pyrenomycete on rosemary

Josep Torres

Hello.A Pyrenomycete sprouting sparsely but very d

29-12-2025 17:44

Lamprospora ? laquelle ?

Isabelle Charissou

Bonjour,J'aimerais savoir si d'autres personnes au

12-11-2021 00:03

White dots on pine

Lepista Zacarias

Hi everybody,A week ago in my fiels trip I noticed

« < 1 2 3 4 5 > »

Helotiales on Betula leaf

Juuso Äikäs, 03-11-2024 07:27

This tiny (0.2 mm wide) brown cup fungus was growing on a decaying Betula leaf.

Asci 8-spored, IKI+(b). The asci have prominent basal protuberances, but seem to lack proper croziers.

There were some cylindrical cells without contents that might be paraphyses or marginal cells.

The excipulum seems to be of textura porrecta.

Spores:

9.6 - 11.89 (11.9) × (2.5) 2.53 - 3.28 (3.3) µm
Q = 3 - 4.1 ; N = 5
Me = 10.2 × 2.8 µm ; Qe = 3.6

Hans-Otto Baral, 03-11-2024 07:50

Re : Helotiales on Betula leaf

I imagined Hyaloscypha fuscostipitata but that has definitely smaller spores and particularly strongly tapering hairs, also a dark base. And you are right: the ascus protuberance does not fuse. What seems to be paraphyses is not clearly alive, are you sure that the fungus has no VBs?

Juuso Äikäs, 03-11-2024 08:38

Re : Helotiales on Betula leaf

Thanks, I'm not entirely sure about VBs -- maybe the fruitbody wasn't in the best condition. Wish I had some extra material. There was some brown pigment on the outside, maybe from crushed cells?

Hans-Otto Baral, 03-11-2024 08:56

Re : Helotiales on Betula leaf

There are globose bodies with that colour which could point to multiguttulate VBs, but not sure.

Accès membres

Forum AscoFrance