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24-04-2026 03:16

Trinacrium robustum?
David Chapados David Chapados

Found while looking at something else from wood in

22-04-2026 20:17

Pseudaegerita spec.
Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

23-04-2026 06:46

Fungus sp
François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Peziza
Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

22-04-2026 19:12

Poilu, violet avec KOH
Louis DENY

Bonjour forum.Trouvé à Belfort, est de la France

21-04-2026 21:00

Hymenoscyphus sp
Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

22-04-2026 01:06

Neonectria ou thelonectria ?
Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

21-04-2026 13:36

Wentiomyces-like on Salix
Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

21-04-2026 13:19

Lophodermium on Typha
Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

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Ciboria on Betula catkin
Juuso Äikäs, 14-01-2021 17:39
Last April I found some quite small Ciboria fruitbodies growing from an old Betula catkin. 

On Betula there are at least two species, C. betulae and C. betulicola. The spore size would fit within the lower range of the former one. About the latter one I haven't found much info. 

The spores measure 9.4 - 10.9 × 4.1 - 5.2 microns. Unfortunately I didn't check the sample in IKI/MLZ or check for croziers. Is it still possible to say which one this is?
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  • message #67075
Hans-Otto Baral, 14-01-2021 18:13
Hans-Otto Baral
Re : Ciboria on Betula catkin
Quite small means less than 2-3 mm?

The one well-living spore looks to me like binucleate, though I am not sure.

In Fungi Canadenses (see my folder) C. betulicola is 2-8(-10) mm diam. with long stipe, and spores uninucleate.

C. betulae = seminicola has rough spores that are more slender.

So I have no idea.
Juuso Äikäs, 14-01-2021 18:42
Re : Ciboria on Betula catkin
The diameter of the apos was maybe max. 3 mm or so. I attached a pic of the entire catkin to give a better impression of the size. Here's also a couple extra micro pics. I'm not sure, but maybe I have accidentally photographed a crozier?
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Juuso Äikäs, 14-01-2021 18:44
Re : Ciboria on Betula catkin
Crozier?
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Juuso Äikäs, 14-01-2021 18:45
Re : Ciboria on Betula catkin
Spore.
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Hans-Otto Baral, 14-01-2021 20:39
Hans-Otto Baral
Re : Ciboria on Betula catkin
Yes, croziers and 2 nuclei. This would fit C. coryli. How certain is Betula?
Juuso Äikäs, 14-01-2021 21:04
Re : Ciboria on Betula catkin
Ah, ok! If I recall correctly, Betula was the only deciduous tree I saw in the near vicinity. But I can't say I'm 100 % sure. The place would be maybe a bit strange for Corylus. I think it was acidic and fairly nutrient-poor.

But I'll have to keep this in mind and later check the place again. Thanks!