I just stopped back to have a look at the plants again. I did take a couple of quick phogtos but was going to say that the plant itself looked like tall blades of grass. So Yellow Star Grass may be a good id.

The blue in the 1st pic is centaura cyanus aka annual bachelor button. The tall yet to bloom appears to be cosmos bipinnatus aka annual cosmos. The red vine is lathyrus odoratus an annual sweet pea. The last pic appears to be verbena bonariensis hanging out over the side. You can indeed collect seed from these. Some of them will automatically reseed themselves if had been ground planted.

It's been a few years since I last grew shungiku but I seem to recall that the petals drooped and the center disk became more rounded with age. I dug back through my photos and came up with one that shows a number of young blossoms and one starting to age in the upper left. On the aging flower, the petals are starting to drop down and the center is taking on a more rounded appearance. Perhaps stress of being moved or age is contributing to the appearance of the OP's flower. FataMorgana

Abutilon theophrasti, Velvetleaf. Here is a link that might be useful: Abutilon theophrasti Google image results