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12-11-2023 16:54

Minute white apos on Rubus idaeus
Stefan Jakobsson

On a dead stem of Rubus idaes I found a small grou

13-11-2023 19:43

Helotiale on Osmunda
Andgelo Mombert Andgelo Mombert

Bonjour, Sur tige morte d'Osmunda regalis, en tou

14-10-2023 11:29

Orange disks
Leif Goodwin

This summer I found some cup fungus on soil with a

26-04-2021 02:59

Literature request
Masanori Kutsuna

Hello everyone,I am looking for this articles. Ba

12-11-2023 23:47

Lophodermium neesii Duby
Ueli Graf Ueli Graf

Hallo, ich habe diesen Pyrenomyceten auf einem Bla

06-11-2023 22:44

Biscogniauxia sp.
Zetti Mario

I am not sure how much you can help me with these

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Podospora sp
Bruno Coué Bruno Coué

Bonjour,auriez-vous un avis sur la récolte ci-dss

10-11-2023 22:37

Cistella sur Pteridium aquilinum
Bernard CLESSE Bernard CLESSE

Une idée de nom pour ce Cistella trouvé sur pét

10-11-2023 17:11

Diplodia-like
Bernard Declercq Bernard Declercq

Hello,Collected on a fallen corticated branch of P

10-11-2023 21:15

Asco imparfait sur Pteridium aquilinum
Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Que pensez-vous de cet a

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Minute white apos on Rubus idaeus
Stefan Jakobsson, 12-11-2023 16:54
On a dead stem of Rubus idaes I found a small group of apos, 200 µm diameter, no obvious hairs. The colour is white, turning light ochraceous when drying.

The spores are 26-33 x 1.4-2.1 µm. Sometimes (especially in CR) they seem to have three septa. The asci are not much longer than than the spores, 30-35 x 5.7-8.4 µm and somewhat thick-walled. The whole ascus turns blue in low concentrations of IKI and brown at higher concentrations. The ascus base is difficult to observe. The paraphyses are clavate, multiseptate, short-celled, sometimes branched.


I would be grateful for help with this one.

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Hans-Otto Baral, 12-11-2023 17:31
Hans-Otto Baral
Re : Minute white apos on Rubus idaeus
I think I saw this but cannot find. I thought in Vezdaea (in my folder Lecanorales) but I see no species with such spores.

Helicogonium conniventis has similar spores, and there is a H. paraconniventis folder with minute white apothecia, but all Helicogonium have inamyloid asci.
Stefan Jakobsson, 14-11-2023 15:10
Re : Minute white apos on Rubus idaeus
Thank you! That Vezdaea helped me to find Bacidina, which now has been confirmed by Stefan Ekman. He sais that it is Bacidina chloroticula.
Hans-Otto Baral, 14-11-2023 17:07
Hans-Otto Baral
Re : Minute white apos on Rubus idaeus
Ha! This was probably what I remembered. I have two species in my folder Bacidina (Ramalinaceae, Lecanorales), B. arnoldiana and B. delicata. Both are relatively similar to yours, and I am not able to tell the differences.
Stefan Jakobsson, 14-11-2023 18:11
Re : Minute white apos on Rubus idaeus
For anybody interested, here is a link to a paper on Scandinavian species: