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18-07-2025 23:03

Josep Torres Josep Torres

Hello.Fruitings between 51 and 130 microns in tota

17-07-2025 11:55

Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y abetos, en tieraEjemp

16-07-2025 17:34

Bernard Declercq Bernard Declercq

Hello,I have trouble distinguishing above mention

14-07-2025 11:20

Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

15-07-2025 13:27

Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

16-01-2023 21:31

Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Gernot Friebes

Hi,do you think this collection could be R. ulmari

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Sur Cytisus scoparius
Yannick Mourgues, 16-03-2009 23:09
Yannick MourguesBonsoir à tous.

Voici une chose curieuse trouvée sur bois mort décortiqué de Cytisus. Elle se présente sous la forme de nombreuses structures +- coniques, noires, couvertes de poils blanchâtres, avec au sommet un pore par lequel sort un liquide opaque brunâtre.

La micro ne donne pas grand chose :
Conidiospores cylindriques, hyalines, 2-3x1-1,5 um.
Structure les supportant : voir photo jointe ci-bas.
Poils hyalins, paroi épaisse 2-3um, en pointe arrondie, difficilement visibles dans KOH.
Paroi devenant violette dans KOH.

Je ne sais pas où chercher ce genre de chose... Une idée ???

Yannick
  • message #7131
Yannick Mourgues, 16-03-2009 23:14
Yannick Mourgues
Re:Sur Cytisus scoparius
Hi.

Here is a curious thing found on dead decayed wood of Cytisus. It appears under the shape of numerous structures + - conical, black, covered with whitish hairs, with in the summit a pore by which a brownish opaque liquid goes out.

Micro doesn't look much:
Conidiospores cylindrical, hyalines, 2-3x1-1,5 um.
Structure supporting them: see photo joined.
Hyalins hairs, thick wall 2-3um, sharp rounded off, with difficulty visible in KOH.
Becoming wall dyes purple in KOH.

I don't know where to look for this specie... An idea???
  • message #7132
Yannick Mourgues, 16-03-2009 23:14
Yannick Mourgues
Re:Sur Cytisus scoparius
autre vue...
  • message #7133
Yannick Mourgues, 16-03-2009 23:15
Yannick Mourgues
Re:Sur Cytisus scoparius
Structure portant les conidiospores...
  • message #7134
Yannick Mourgues, 16-03-2009 23:16
Yannick Mourgues
Re:Sur Cytisus scoparius
Paroi dans KOH
Wall in KOH
  • message #7135
Christian Lechat, 17-03-2009 06:19
Christian Lechat
Re:Sur Cytisus scoparius
peut-être un Dendrophoma
Hans-Otto Baral, 17-03-2009 08:24
Hans-Otto Baral
Re:Sur Cytisus scoparius
The violet KOH-reaction clearly proves that this is the anamorph of Proliferodiscus pulveraceus, the excipulum of which also reacts violet. As in Lachnellula the anamorph is currently called Cytospora.

Zotto
Christian Lechat, 17-03-2009 09:10
Christian Lechat
Re:Sur Cytisus scoparius
Hi, Zotto,
I don't believe that it's the genus Cytospora because in this genus there are not pycnidia but pseudopycnidia, subperidermal, erumpent and multilocular conidiomata

Christian
Hans-Otto Baral, 17-03-2009 13:00
Hans-Otto Baral
Re:Sur Cytisus scoparius
Hi Christian

thanks, this is an interesting idea. Erumpent would fit to tzhe anamorph Lachnellula, but not and mutlilocular. I see that Dharne compared Cytospora and others but finally decided that Naemaspora fits best. But apparenty these Naemaspora are light-coloured pycnidia while Cytospora is dark-coloured. I strongly suppose that true Cytospora does not have this violet KOH-reaction.

Earlier P. pulveraceus was also placed in Lachnellula. I think Spooner and Kohn wrote Cytospora

Zotto
Yannick Mourgues, 20-03-2009 21:18
Yannick Mourgues
Re:Sur Cytisus scoparius
Bonsoir et merci à tous les deux.
En résumé, il s'agit donc ici, si j'ai bien compris, de l'anamorphe de Proliferodiscus pulveraceus. Mais alors, Cytospora ou pas ?
Yannick

Good evening and thanks to both.
In summary, it is thus here, if I understood well, about the anamorphe of Proliferodiscus pulveraceus. But then, Cytospora or not?
Yannick
Hans-Otto Baral, 20-03-2009 22:15
Hans-Otto Baral
Re:Sur Cytisus scoparius
I am unaware that anybody named the anamorph of P. pulveraceus although it is known since perhaps 100 years. But my opinion is that anamorphs do not need a separate name.

Anamorph nomenclature is a controversy issue. You can either use a generic name as a form genus, and then it is not so important that this is a phylogenetically defined group, only the morphological similarity is important. This is what I try to do. Or you give a name for any anamorph, which is a quite difficult and somewhat useless task.

Zotto
Yannick Mourgues, 20-03-2009 22:27
Yannick Mourgues
Re:Sur Cytisus scoparius
Thank you for this precision !
Yannick!