Hyalopeziza - Forum ASCOFrance

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Hyalopeziza

Elisabeth Stöckli, 31-07-2016 23:27

Bonsoir,

Encore une espèce d'altitude (2'335m), sur fleurs mortes de Cirsium spinosissimum
apothécies 0.25-0.5mm de diamètre, entièrement orange, surface externe et marge couvertes de poils, asques 75-90x9-12µm, octosporés, IKI rouge, spores 9-12x4.5-5µm (peu de spores en dehors des asques), 0-1x septées, lisses, hyalines, paraphyses filiformes et septées, poils réfringents jusqu'à 65µm, KOH 3% aucun changement.

Merci d'avance pour votre avis.

Elisabeth

Stip Helleman, 01-08-2016 01:21

Re : Hyalopeziza

Dear Elizabeth,
the hairs look to me more like Olla or Unguiculella with only a lumen at the base.
Please check the stability of the glassy parts of the hairs in a higher KOH concentration
(> 5% is reliable) If you do not have higher concentration try KOH boiling and see if hairs are losing refractiveness and become permeable to Congo Red or Melzer.
Are asci with croziers, I can not see from your photos.

cheers,
Stip

Kosonen Timo, 01-08-2016 09:21

Re : Hyalopeziza

Olla seems unlikely, but that should be easy to rule out with KOH/MLZ just as Stip suggested. Maybe some hairs are somewhat typical "Unguiculella", but then I found Hyalopeziza latispora from Raitviirs book (2004). Never seen the species, thou. What do you think?

Timo

Stip Helleman, 01-08-2016 23:40

Re : Hyalopeziza

Hi Timo,
never seen this species too but it fits very well, perhaps this alpine finding even could be regarded as H. schachdarica as Raitviir suggests.
from the original schachdarica description.
pili 35-50 x 1.5-2.5 asci 80-100 x12-18 spores 11-13,5 x 4-6 (this 18 um wide asci appear very strange to me and nothing about Iodine reaction or croziers)
regards,
Stip

Kosonen Timo, 02-08-2016 11:25

Re : Hyalopeziza

Maybe this goes without saying, but If you have the time Elisabeth and the sample is still fresh, please make good annotations both water/alive and in dead state too!

T

Elisabeth Stöckli, 02-08-2016 21:23

Re : Hyalopeziza

New collection from the same site, very common on old flowers of Cirsium spinosissimum, young apothecia orange, later yellow ocher.

MLZ-/IKI red/KOH+IKI blue, still glassy hairs in KOH 5%, croziers+

Elisabeth

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