This is pretty, Gary, and what a good idea to try to save the seeds. My sister-in-law does that and always has many nice flowers around their property. She also dries flowers and makes amazing greeting cards using the tiniest portions some of them to create hummingbirds, etc.
Yeah, I did that once, with milkweed. We're gone so much, I think I miss the other plants I would be interested in (primarily Black-eyed Susans). Now (a) I've reached the age where it's too tedious and (b) we're not sure how much longer we'll be in this house...