Hi
I rarely meet purple Peziza so I don't have much experience with them, so please help me identify this collection.
Very microscopically similar to P. celtica but not in all details.
It grew on a gravel bed, on the side of a forest road, where rainwater collects, so the ground is wet. Ascobolus behnitziensis grew nearby.
The body is very thin, delicate.
I thought I had harvested the ascomat not ripe so I kept it for a few days, but without much effect. The spores grew minimally and the ornamentation remained the same, so their surface is only slightly rough. Certainly not like P. celtica.
Their dimensions are also much smaller.
I also don't like the ectal excipulum texture. Cells are oval in my collection.

Spores;
(13.4) 13.5 - 16.1 (16.6) × (7.4) 7.5 - 9.9 (10) µm
Q = (1.5) 1.6 - 1.9 (2); N = 14
Me = 14.8 × 8.5 µm; Qe = 1.7
greetings
Mirek