Small white dics on birch - Forum ASCOFrance

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Small white dics on birch

Margot en Geert Vullings, 10-01-2024 17:28

On decayed birch on the ground we saw these very small white discs, no stem and they appear to have no hairs.

Spores measured in water:
Me = 11.3 × 3.8 µm ; Qe = 3

Ascus measured in water:
Me = 61.9 × 10 µm ; Qe = 6.2
IKI+

Paraphyses septated, cylindrical, slightly thickened towards the apex, without VBs.

We were thinking towards Hyaloscypha and were suggested Hyaloscypha minuta (Parorbiliopsis) , a species without hairs, but with reaction IKI neg.
Does anyone have an idea about this?

Thanks in advance,
Margot&Geert