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29-11-2024 21:47

Calycina heterospora
Yanick BOULANGER

BonjourJ'avais un deuxième échantillon moins mat

27-02-2026 17:51

Parasite de Evernia Prunastri
Michel Hairaud Michel Hairaud

Bonjour, Quelqu'un peut il me donner un conseil p

27-02-2026 16:17

Sydowiella or Melanconis teleomorph on Betula
Mathias Hass Mathias Hass

Hi, Found this on Betula, rather fresh fallen twi

27-02-2026 12:56

Conidiomata on Pinus sylvestris cones
Åge Oterhals

Found on fallen cones of Pinus sylvestris in midle

27-02-2026 11:21

Nemania diffusa complex
Yannick Mourgues Yannick Mourgues

Hi to all. Here is a specie that can may be relat

26-02-2026 22:06

Geoscypha
Malcolm Greaves Malcolm Greaves

Can someone explain the features that split Geoscy

26-02-2026 15:00

En madera sin determinar
Castillo Joseba Castillo Joseba

Me mandan el material seco de Galicia, recolectada

24-02-2026 00:21

Pezizale
Benoît Segerer

Hello,I'm new to this forum, I hope I won't be irr

24-02-2026 11:01

Anamorph on Tilia
Gernot Friebes

Hi,found on a branch of Tilia, with conidia measur

23-02-2026 11:22

lasiosphaerioid on pine cone with small, slender spores - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10584971

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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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  • message #77363
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  • 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: