I have no idea but I doubt abour the crystals. I never saw crystals and VBs in combination. Do you have a photo of the crystals?

Hi Zotto

Maybe the crystals are not true crystals but resinous exudate or even a mixture of both: exudate with minute acicular crystals because they are very easily removed of the tips and I cannot see free released crstals in the mountings.

Anyway, lacking crystals, do you know a foliicolous Lachnum with these characters?

Thanks in advance

Though it sounds strange, the material does not disappear in KOH 10%.

Yes indeed. But true crystals look different. Did you test in CRB (aqueous)?
Sorry, I overlooked your third plate in the pdf. So clearly the material stains in CRB. This tells for a resinous exudate.

Hi Zotto

Anyway you don't know this species, isn't?

Actually not. Lachnum charretii (?= L. virgineum) is described with croziers, so is excluded.

Zotto

Thanks Zotto. Thanks again

Hi Enrique and Zotto ,

Did you compare this collection to Lachnum '' gemmarum'' ? But for the resinaceous lumps around hair tips, I find their macro and micro features  quite comparable .

Enrique, did you also search the leaves buds envelops where gemmarum is supposed to grow ?

Amitiés Michel

 

Hi Michel

good idea! But I know L. gemmarum only without VBs.

Zotto

Hi Michel

Wellcome to the matter! Yes. Macroscopically are quite similar but Zotto's pics show us more celled hairs narrowly attenuated towards their tips. Unfortunately I have never studied this common species on Fagus buds but I think the hairs of my collection are more regulary cylindrical only 1-2 septate and the paraphyses have Vbs as Zotto says.

Hi Enrique,
excuser me for giving my opinion on this matter too.
I think it is more a Dasyscyphella although I can not find a matching species, the hairs are not typical but judging your photos show in CB Lactophenol some glandular apical cells. This is also matching with the dimorphism in the ascospores which is a feature of Dasyscyphella as well is the resinous exudate.
This gemmarum looks indeed somewhat related.
Stip

Hi Stip. Do you think this is a Dasyscyphella with so fully granulate and regular hairs? I think these hairs are not very typical for this genus.

Thanks

Hoi Stip

I need to object here that your suggestion sounds interesting but I never met a species of Dasyscyphella with VBs. Who knows...

Anyhow, I remember such excretions to have seen sometimes in Lachnum. In my pics I found some exudate on hairs of L. reynoutriae, for instance.

Zotto

Hi Enrique et Zotto,
I was pointing to the similarities with Dasyscyphella, I had never seen a Lachnum with exudate. This looks for me as an intermediate species between Genera, it would be interesting to get a sequence out of it.

cheers
Stip

Maybe, Stip. I'll keep you informed. Before we will make a test with polarized light searching for crystals.