It looks like you have I.D. it tiffany. I usually do not go out on the balcony until mid afternoon so I never saw the buds open. Today I went out at 11 am and they were still open but looked like they were ready to close. I just find it strange that the seeds took 2 yrs to bloom.
I went back and looked when I posted if the plant was hardy. This is really one of the slow forums it is on page 2 it was the summer of 2012. I brought the pot inside for the winter because I have other tender sucs in the pot. But they have never showed their face since 2012.
The thread "Hardy or Not" in
Purslane and Portulaca forum
This is what the blooms looked like since I was able to see them before they closed.
