Salut à tous,

On 26/3/2014 I found some little perithecia on Carex Pendula I am having some problems with:

Perithecia immersed, 0.4 - 0.5mm, ostioles barely protruding through host tissues which are blackened at the surface.

Ascospores 20.6 - 23.7 x 6.2 - 7.7 µm, 1-septate, spore walls thickened at septa, with faint to distinct logitudinal striations, surrounded by a short-lived gel sheath which is greatly thickened at the poles.

Asci with complex subapical apparatus, IKI blue

Paraphyses filiform, septate.

I looked in Ellis & Ellis and found Ceriophora palustris, which seemed a good fit apart from the lack of ascospore striations (also there is no thickening at the setpta, but this could just be an author oversight...). I couldn't find any information on the iodine reaction of this species.

I also looked in 'Revision of Amphisphaeria' Wang, Aptroot & Hyde (the striations reminded me a little of the germ slits in Cainia) and found Arecophila saccharicola which seems a better fit, though a little exotic as it's a Jamaican species described from Sugarcane.

Does anyone have have any experience of these groups? Am I going down the wrong path?

Amitiés et comme toujours, merci pour l'aide!

Nick

Björn Wergen, 29-03-2014 00:01

Re : Cainiaceae on Carex?

Hi Nick,

it rather looks like Cainia desmazieresii, but spores are a bit too broad and the substrate is Cyperaceae anyway, which may more typical for C. graminis with larger spores over 30µm length.

Is it possible to send a sample of this interesting species?

regards,
björn

Björn Wergen, 29-03-2014 08:38

Re : Cainiaceae on Carex?

Yes, I think so to, there are currently a few species described in this genus, and there is a confusion with Amphisphaeria / Arecophila saccharicola, described by Sivanesan 1975. I would like to check that.
Adress via email.

Thanks.

björn

Alain GARDIENNET, 30-03-2014 08:33

Re : Cainiaceae on Carex?

Salut les amis,

Your analysis is right Nick. Arecophila is the good genus, I think

Have you compared to Arecophila striatispora, a french species. Do you observe a true clypeus on the surface, or only blackened tissues ?

It seems to be very  closed.

Alain

Jacques Fournier, 31-03-2014 11:53

Re : Cainiaceae on Carex?

Hi all,
sorry I missed the train.
It fits well Arecophila indeed, and Amphisphaeria/Arecophila striatispora fairly well too. Bjorn, I have a collection of A. striatispora from Basque Country on bamboo, I will send you a piece for comparison. Can you send me (again?) your postal address?
Cheers,
Jacques