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26-04-2025 16:01

Jacques Fournier Jacques Fournier

J'ai le regret d'informer les membres du forum qui

26-04-2025 07:15

Dragiša Savic

Hello everyone,the lichen is Candelariella aurella

25-04-2025 22:48

Gustaf Fredell Gustaf Fredell

Hello,I hope everything is going well. I couple mo

18-04-2025 23:16

Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

24-04-2025 21:35

Thorben Hülsewig

Hi there,last week i could found this asco on an S

25-04-2025 17:24

Stefan Blaser

Hi everybody, This collection was collected by J

25-04-2025 09:33

Josep Torres Josep Torres

Ascomata shaped like deformed black grains, measur

24-04-2025 21:53

Lothar Krieglsteiner Lothar Krieglsteiner

... 15.7.24 in the Alps. There were many asci with

23-04-2025 20:16

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon Looking for Octospores / Lamprospo

24-04-2025 15:03

Henri Koskinen

Hello, I collected this Lasiobolus 22.04. near Hel

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Christmas Calycellina
Michel Hairaud, 26-12-2011 12:51
Michel Hairaud  Bonjour à tous , Hi to everyone,

Here are a few pics of an orbilloïd fungus 0,1-0,7 mm large, greenish-yellowish found on inner side of Acer bark yesrterday (December 25) 
It would match C. chlorinella but it is on wood (C. chlorinella is supposed to be caulicolous, I already found it on Sambucus ebulus ) and with negative IKI.
Spores would suit C. vulgaris ones' dimensions but I cannot find any description ot pic of this taxon.

Voici quelques images d' disco orbillioïde, verdâtre jaunêtre récoté hier 25 /12 sous l'écorce d'Acer;
Les caractères sont très proches de C; chlorinela que j'ai déjà récolté sur sureau yèbe mais ici les asques sont IKI- et cette espèce est sensée être caulicole. 

Merci de vos avis,et documents. 
Bonne fin d'année et amitiés à tous
Michel 
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Hans-Otto Baral, 26-12-2011 13:13
Hans-Otto Baral
Re : Christmas Calycellina
Hi Michel

the type of Calloria luteola Roumeguère, on stems of Cannabis, is C. chlorinella but with inamyloid asci. See DVD HB 7644.

McPartland & Cubeta, Mycol. Res. 101(7): 854 (1997)?, made a combination in Orbilia (!), therefore, I studied this material.

There is also a find on Salix by Bernd Fellmann, with inamyloid asci (Calycellina chlorinella 15.XI.08).

Was your find some cm or m above ground? Because inamyloidity would suggest that. Do you have a closer photo of a dead ascus apex in IKI, best more immature? I wonder about an apical thickening, because there is an "Orbilia" veratri Velen. (HB 6399) which is similar to this luteola.


Zotto
Michel Hairaud, 26-12-2011 16:16
Michel Hairaud
Re : Christmas Calycellina
Thanks, Zotto for your diigent answer.
Yes I had noticed in your DVD the inamyloïd ascus of Roumeguere's collection.
And yes, it was a 20 cm large trunk, ca 1 m above ground . 

Here are more ascus pics in water and IKI

Spore guttulation is different from ''O'' veratri in your HB 6399 plate

Michel
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Hans-Otto Baral, 26-12-2011 16:51
Hans-Otto Baral
Re : Christmas Calycellina
That's fine, a clear apical thickening, but with an middle conical chamber.

It is probable that this is a species different from chlorinella, but perhaps not confined to wood alone.

You said you had a previous collection on Sambucus ebulus. Any pics? Was this also erect and falling dry?

Zotto
Michel Hairaud, 26-12-2011 18:56
Michel Hairaud
Re : Christmas Calycellina
It seems a different fungus indeed, with longer ascus (ca 20 µm longer) , longer spores. and a positive IKI reaction , copper brown at first turning bluish after a while ( don't ask me how long, I did not notice) 
I do not remember if the Sambucus stem was still erect 
Unless the taxon includes this variability

Here are pics of this collection (MH 181110) made on November 15 last year.  

Amitiés
Michel
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Hans-Otto Baral, 26-12-2011 21:40
Hans-Otto Baral
Re : Christmas Calycellina
Yes, this sounds for typical chlorinella. The reaction is RB, first blue, at higher conc. red.

Zotto
Michel Hairaud, 26-12-2011 23:54
Michel Hairaud
Re : Christmas Calycellina
I noticed the reverse colour transformation but I suppose th ereason is the same (concentration in water)

By the way, is   inamyloïdity in more drought resisting apothecia, i.e quite above ground surface,  a regular rule ? (As you suggested in your previous answer )?

Michel
Hans-Otto Baral, 27-12-2011 10:48
Hans-Otto Baral
Re : Christmas Calycellina
It is a strong tendency but, s any rule, it has its exceptions. F.ex., Mollisia caespiticia and ligni are inamyloid and strictly on xeric substrate. But you can also find some other Mollisias with amyloid rings on such attached branches.

Inamyloid Helotiales that occur strictly on the ground are rare, however, and usually they belong in genera which have all inamyloid asci (e.g., Claussenomyces).

Zotto