Seeds: parsley or celery?

[Ann123]

Last summer my mom saved some seeds and when they were dry she didn't remember if they were flat parsley seeds or celery seeds.
She has 2 batches. Maybe they are both parsley or both celery or one is celery and the other one parsley. yes, not easy.
Is it possible to identify them? I tasted them. They have a carrot taste and maybe that the darker batch has some celery taste.

On the first pic the darker batch is upper, the one with clearer lines down.
Second pic: darker
Third pic: clearer lines