Minute white apos on Rubus idaeus

06-05-2025 13:37

Looking for digital literature of Munk Anders

Thomas Flammer

Munk, Anders (1953). The System of the Pyrenomycet

08-05-2025 20:50

Greyish aquatic asco

Andreas Jacob

Good evening, due to contstant drought I started

07-05-2025 18:29

Olla or Urceolella?

Francois Guay

I found this small hyaline ascomycete on moist, de

08-05-2025 02:22

White Lasiobelonium?

Francois Guay

I found this white, hairy ascomycete on the bark o

08-05-2025 18:32

On Yucca filamentosa - conidia like Robillarda, but aseptate

Ethan Crenson

Hello all, I was looking at leaves of Yucca from

08-05-2025 08:59

Xylaria para ID 0402

Castillo Joseba

Me mandan el material de Galicia, (España) , reco

07-05-2025 10:18

Fusarium sambucinum

Thomas Flammer

I have found on Genistae sth. that looks like puli

05-05-2025 09:35

Inoperculé noir sur herbacée

Nicolas Suberbielle

Bonjour à tous,Marie-Rose d'Angelo de la Sociét�

06-05-2025 12:52

En madera de Eucalipto 0237

Castillo Joseba

Me mandan el material de Galicia (España), reco

06-05-2025 13:22

En Helecho, 0256

Castillo Joseba

Me mandan el material de Galicia (España), reco

« < 1 2 3 4 5 > »

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.

Hans-Otto Baral, 12-11-2023 17:31

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

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:

https://doi.org/10.1111/njb.03846

Accès membres

Forum AscoFrance