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02-02-2026 21:46

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

02-02-2026 14:55

Andgelo Mombert Andgelo Mombert

Bonjour,Sur thalle de Lobaria pulmonaria.Conidiome

02-02-2026 14:33

Andgelo Mombert Andgelo Mombert

Bonjour,Sur le thalle de Peltigera praetextata, ne

31-01-2026 10:22

Michel Hairaud Michel Hairaud

Bonjour, Cette hypocreale parasite en nombre les

02-02-2026 09:29

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pour cette récolte de 2

01-02-2026 19:29

Nicolas Suberbielle Nicolas Suberbielle

Bonjour, Marie-Rose D'Angelo (Société Mycologiq

30-01-2026 22:49

éric ROMERO éric ROMERO

Bonjour tous, Récolté dans les Vosges le 22/10/

31-01-2026 09:17

Marc Detollenaere Marc Detollenaere

Dear Forum,On decorticated wood of Castanea,I foun

29-08-2025 05:16

Francois Guay Francois Guay

I think I may have found the teleomorph of Dendros

30-01-2026 21:20

Arnold Büschlen

Bryocentria brongniartii und B. metzgeriae mit ihr

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Bisporella citrina??
William Slosse, 09-02-2016 20:32
William Slossegrowing on fallen dead branches of birch in old dunearea.
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Hans-Otto Baral, 09-02-2016 20:51
Hans-Otto Baral
Re : Bisporella citrina??
I think it is Calycina (earlier Bisporella) clariflava (= Bisporella sulfurina)

If you check the iodine reaction it should be negative. C/B. citrina has larger spores and amyloid asci.
William Slosse, 09-02-2016 21:43
William Slosse
Re : Bisporella citrina??

Thx for your reaction, Hans-Otto.


I'm new on this forum, but very pleased with this quick response.


I have still a fresh specimen in collection and I will check the reaction with Meltzer's reagens.


I found not a (good) key to convince me if it's citrina or sulfurina so I thought why not putting the question on this forum.


Nice to become some very interesting information from experts.

Hans-Otto Baral, 09-02-2016 21:54
Hans-Otto Baral
Re : Bisporella citrina??
You could also try to check the ascus base: citrina with croziers, claroflava without, but it is not easy.

Btw, it is better to use Lugol/IKI for testing ascus reactions.
http://invivoveritas.de/articles/iodine-reaction-in-ascomycetes-why-is-lugols-solution-superior-to-melzers-reagent/

best regards
Zotto
William Slosse, 09-02-2016 22:35
William Slosse
Re : Bisporella citrina??

The habitus of croziers is indeed for me something difficult to recognize.


I detected following structure while searching for asci etc. Can this be a crozier?

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Hans-Otto Baral, 09-02-2016 22:42
Hans-Otto Baral
Re : Bisporella citrina??
no, but on the left of your pic I see a bit unsharp that croziers are absent (asci are "simple-septate").
William Slosse, 09-02-2016 22:52
William Slosse
Re : Bisporella citrina??
Thx for all your info, Hans-Otto, very instructive for me!