Top is a Silene. Which ones would occur where you are I don't know. I believe Silene Alba, White Campion, is a candidate.

Bottom is Aurinia saxatilis.

ETA healthy bunch of garlic mustard seed pods behind the Campion.😉

Where are the garlic mustard seed pods in the picture? I genuinely don't know what those are. I almost pulled out the Silene or White Campion but I realized it looked sort of cool. Total voilunteer. haven't seen it before.

ETA: I think I know what you mean now. These just started popping up in my yard (the garlic mustard) if they have needle-like parts that turn dry and brown. I read that they are invasive in N. America. I guess I'd better start pulling every one I see up.

The needle like parts are the seed pods. They start out green and then dry brown and disperse their seeds. Obviously the seeds follow the flowers which you may have missed.