tulip seed?

There are these very curious forms on the top of stems from some of my faded Tulip plants.

They look like big seed pods to me.

I didn't know Tulips made seed like this. I've only ever seen bulbs for sale. So now I'm wondering if I can dry the pods, grow the seeds, and spread more tulips through my yard. Kind of silly, as I'm not really fond of tulips, but they do give easy color in the front yard for a good part of the spring, and the plant that's doing this, at least one I think is my favorite of all the colors- the purple. Of course, I don't know if the seeds would make the same color flowers, or different ones...