Me neither, that's why I had added the question mark. There are quite a lot of similar looking plants, making it hard to determine the family, let alone the exact species.
From what I read about the P. ostruthium and P. oreoselinum, the flowers are very similar. If only I had taken a photo of the leaves, the determination would be easier, because according to this site, oreoselinum has pinnate leaves and ostruthium ternate.
"So I was sitting in my cubicle today, and I realized, ever since I started working, every single day of my life has been worse than the day before it. So that means that every single day that you see me, that's on the worst day of my life."
--Peter Gibbons (Office Space)