13-06-2025 16:34
Andgelo Mombert
Bonjour,Un petit discomycète qui me résiste. Il
13-06-2025 09:41
Josep Torres
Hello.A cerebriform ascomycete sprouting scattered
21-07-2025 19:22
Ethan CrensonHello all, Here is an Orbilia found by a friend
14-07-2025 11:20
Michel Hairaud
Bonjour, Voici une espèce de (?) Hyaloscyphace
18-07-2025 23:03
Josep Torres
Hello.Fruitings between 51 and 130 microns in tota
16-07-2025 17:34
Bernard Declercq
Hello,I have trouble distinguishing above mention
16-01-2023 21:31
Riet van Oosten
Hello, Nearby the find of Calycina claroflava on
Hymenoscyphus ->H. vacini
Margot en Geert Vullings,
19-09-2023 10:46
With Ellis&Ellis and Fungi of Temperate Europe we ended up at Hymenoscyphus, because of the large spores.
Fruit bodies: 0.5-2mm diameter, dark yellow
Spores size: 22-23.4 x 5.6-6.06 µ (measured in water)
Ascus size: 92.7-113.5 x 9.64-11.8 µ (measured in water)
Paraphyses: VB's
Ascus: we haven't found any croziers, but we still find that very difficult.
We can't figure it out with this key: https://web.micolosa.net/wp-content/uploads/claves-hymenoscyphus.pdf
Which Hymenoscyphus could this be?
Thank you in advance,
Margot
Hans-Otto Baral,
19-09-2023 15:17
Re : Hymenoscyphus
This must be H. vacini on Acer. I never had it on another tree. Typical the skeletonized leaf and the fine dark network on the receptacle and dark stipe. The reticulum is not celar on your pics, though. And I do not know the species dark yellow or yellow-orange as I see on my screen.
I have published on this species in my paper about H. fraxineus/albidus.
The absence of croziers I cann see:
Margot en Geert Vullings,
19-09-2023 19:41
Re : Hymenoscyphus
Thank you very much Zotto, that could possibly be a new species for the Netherlands.
Acer leaf is very possible, there are also Acer trees.
Acer leaf is very possible, there are also Acer trees.
I added pictures of the reticulum, is that what you mean?
Margot
Hans-Otto Baral,
19-09-2023 20:42
Re : Hymenoscyphus
It could be, I think it is not always distinct under the micro but could be seen in macrophotos of the underside. But I really think it is not constant. More clear is the blackish stipe, like the H. albidus group.
I compared leaves of Acer pseudoplatanus with H. vacini in my folder, and actually the branching of the main veins of the leaf is alternate, contrary to the branching of the twigs of Acer.
Margot en Geert Vullings,
19-09-2023 21:38
Re : Hymenoscyphus
I have added a photo of the underside and a not so sharp photo of the leaf veins.
That part of the forest contains from Acer mainly Acer Pseudoplatanus, there was an inventory there last year.
Margot
Hans-Otto Baral,
20-09-2023 09:20
Re : Hymenoscyphus
At least the black stipe base and the dark marginal rim are typical.
Margot en Geert Vullings,
20-09-2023 10:21
Re : Hymenoscyphus
Thank you very much Zotto.
We saw that there is already one sighting in the Netherlands with the name Lanzia vacini.
Margot
Hans-Otto Baral,
20-09-2023 10:36
Re : Hymenoscyphus
Yes, that was the old school who considered all blackening of the substrate as indication for a relationship with Sclerotiniaceae. H. albidus was therefore transferred by Korf to Lambertella.