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13-02-2026 18:05

Tiny disc on Acer
Margot en Geert Vullings

On February 9, 2026, we found these small hairy di

14-02-2026 10:58

Asco blanc sur Diatrype
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

13-02-2026 03:30

Unknown near Pseudohalonectria
Tomaz Vucko Tomaz Vucko

Hello! I found these immersed perithecia on a stic

13-02-2026 18:02

Help ID
Nogueira Héctor

November 2025 León (SPAIN) ID Help Hello! Thi

12-02-2026 21:34

Attaque des feuilles de Quercus suber
patrice Callard

Bonjour, la face inférieure des feuilles ce certa

11-02-2026 22:15

Rutstroemia maritima?
William Slosse William Slosse

Today, February 11, 2026, we found the following R

12-02-2026 14:55

Brown-spored and multiseptate loculo on Euonymus europaeus - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10581810

11-02-2026 19:28

Pezizaceae spec. from Germany
Lothar Krieglsteiner Lothar Krieglsteiner

on small deciduous twig on the ground in forest wi

25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

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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.

  • message #77363
  • message #77363
  • message #77363
  • message #77363
  • message #77363
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: