22-04-2026 01:06
Richard VALERI
Bonjour à tous.Je vous présente cette Nectria s.
21-04-2026 13:36
Gernot FriebesHi,I am out of ideas for this one. I collected Sal
21-04-2026 13:19
Gernot FriebesHi,this Lophodermium on Typha has ascospores measu
21-04-2026 13:05
Gernot FriebesHi,this hyphomycete feels familiar but I was not a
20-04-2026 22:00
Malcolm Greaves
These pale yellow, hairy ascos were growing on cul
19-04-2026 21:23
Steve ClementsBonjour, I found this anamorphic fungus on old pl
19-04-2026 20:46
Steve Clements1 mm diameter approx spherical conidiophores on pl
12-04-2026 17:56
Hardware Tony
Found on dead stems in February earlier this year
Hymenoscyphus sp?
Rot Bojan,
06-11-2025 16:50
Yesterday I found a fungus on or near a needle, about 5 mm high. It is yellowish when fresh, later brownish with hairy and longitudinally whitish fibers. The spores are on average 16.2 x 6.1 microns. IKI+
Thanks in advance and best regards!
Hans-Otto Baral,
06-11-2025 17:14
Re : Hymenoscyphus sp?
You don't have it fresh for microscopy? The insertion of the stipe cannot be clarified?
My guess is a Rutstroemia, although the excipulum looks rather hyaline. Good would be to see the shape of the amyloid ring, also the contents of the living paraphyses.
Rot Bojan,
06-11-2025 17:44
Re : Hymenoscyphus sp?
Thanks for the quick reply.
The stipe is centrally inserted and gradually expands into the disc, without a distinct margin between the stipe and the hymenial surface.
I am attaching photos of the paraphyses in water and of the apical ring – slightly enlarged. The specimen was fresh, but not in perfect condition.
The stipe is centrally inserted and gradually expands into the disc, without a distinct margin between the stipe and the hymenial surface.
I am attaching photos of the paraphyses in water and of the apical ring – slightly enlarged. The specimen was fresh, but not in perfect condition.
Hans-Otto Baral,
06-11-2025 19:36
Re : Hymenoscyphus sp?
The paraphysis is dead but the apical ring is perfectly sclerotiniaceous. A possibility would be Rutstroemia luteovirescens on Acer petioles.
Rot Bojan,
06-11-2025 20:12
Re : Hymenoscyphus sp?
Thanks